ABS Resin Injection Molding Grades: GP, High-Heat & V-0

Specifying “ABS” on a material drawing is roughly as precise as specifying “steel” on an engineering specification. Both cover a family of materials with performance ranges that span two to three times the difference in critical properties. A purchasing team at a consumer electronics manufacturer learned this the hard way when a supplier substituted a general purpose ABS resin injection molding grade for the flame retardant grade originally qualified for their product. The parts looked identical. The UL94 rating did not survive the change, and neither did the product’s safety certification for the European market.

There are a few factors that need to be considered when Choosing an adequate grade of ABS resin for injection molding. The purpose of the given material is to identify the four basic grades of ABS resin and provide information about the use of HIPS in the same context. Moreover, this report contains descriptions of the respective equivalents of major players in the industry and a decision-making tool that allows users to quickly determine the specification applicable to the task at hand, whether it involves initial grading or seeking an alternative for the first-choice grade.

After reading, you will be able to tell which grade of ABS fulfills your needs, be able to list the particular branded grades you will ask the supplier to deliver and understand the requirements that need to be fulfilled before shipping out the initial batch for production.

What Is ABS Resin?

ABS or acrylonitrile butadiene styrene is a widely used synthetic polymer, which is mainly obtained from complex polymerization of three basic monomers: acrylonitrile (resistance to chemicals and structural integrity), butadiene (hardness and functioning in cold), and styrene (surface property, hardness, and ease of working).

A noticeable firm framework is formed, but made resilient due to minor dispersion of elastomeric particles. It is this distinct feature that provides ABS: an effective combination of flexural stiffness, resistance to impact, and good surface appearance without compromising on cost. Easily processed using traditional injection molds, accepts paint and electroplates very well, and maintains stable dimensions over a variety of uses of such material.

When materials are characterized by a balanced property profile, they tend to be regarded as useful thermoplastics. In this regard, the acrylonitrile butadiene styrene plastic is of most interest as it has a two-phase structure including particles dispersed in a matrix. This is what provides its balance of stiffness, impact strength and cost-effective aesthetic. It molds without difficulty in normal injection molding machinery, paints well and electroplates beautifully with sufficient stability of dimensions in different ways it is put to use.

There isn’t a single high-performance mechanical engineering plastic where the acrylonitrile butadiene styrene plastic (ABS) is at the top when it comes to any of its categories. ABS, owing to it being the best overarching ‘commodity engineering plastic’ that is applicable for the middle range of performance, given it is nearly a third of that of engineering thermoplastics consumed worldwide. However, this is a broad “mid-performance” category. Also, the difference between a general-purpose, low-heat-resistance ABS, and one with high-zone heat resistance is significant to the point of affecting the usefulness of a component under a summer-packed car scenario.

Key ABS resin properties at a glance:

The Four Core ABS Grade Categories

The ABS resin injection molding grade you specify should match your application’s primary performance requirement. Four categories cover the vast majority of injection molding applications.

General Purpose ABS

What it is: Balanced properties grade optimized for processability and cost efficiency. Standard tensile strength of 40 to 50 MPa, heat deflection temperature (HDT) of 85 to 100 degrees C at 1.82 MPa, and Notched Izod impact resistance of 200 to 300 J/m.

Applications: Consumer electronics housings, appliance panels, computer peripherals, toys, office equipment, storage containers, and any interior component without elevated temperature, flame, or specialized surface treatment requirements.

Grade examples:

• Chi Mei POLYLAC PA-757: Standard injection molding grade; 93 degrees C HDT; widely specified for appliance panels and electronics enclosures
• LG Chem LUPOS HI-121H: High-gloss general purpose grade; 93 degrees C HDT; strong surface finish for consumer goods
• INEOS Styrolution TERLURAN GP-22: European-origin general purpose grade; 92 degrees C HDT; good balance of stiffness and impact
• Formosa TAIRILAC AG15A1: Cost-competitive general purpose grade; 90 degrees C HDT; suitable for high-volume consumer goods

When to choose it: Your application has no sustained temperature exposure above 80 degrees C, no flame retardancy requirement, and no specialized surface treatment beyond paint or standard lacquer.

High-Impact ABS

What it is: Grades with elevated rubber content for improved toughness, particularly at low temperatures. Notched Izod impact of 400 to 600 J/m, compared to 200 to 300 J/m for general purpose grades. Tensile strength is slightly lower (35 to 45 MPa) as the trade-off for toughness.

Applications: Tool housings, sporting goods, luggage shells, automotive interior trim, and any application where drop impact or handling impact is the primary design load.

Grade examples:

• Chi Mei POLYLAC PA-747: High-impact grade; 88 degrees C HDT; specifically formulated for applications prioritizing toughness over surface appearance
• LG Chem LUPOS XR401: Super high-impact grade; 88 degrees C HDT; rated for low-temperature impact performance down to minus 30 degrees C
• INEOS NOVODUR E 502: Reinforced impact profile for automotive interior and industrial applications

When to choose it: Your component must survive drop testing, repeated impact in service, or cold-climate handling conditions. If your design standard includes drop test requirements (1-meter drop is common for portable electronics), high-impact grade is the starting point.

High-Heat ABS (HDT 105 to 125 Degrees C)

What it is: Grades with heat deflection temperatures of 105 to 125 degrees C under 1.82 MPa load, compared to 85 to 100 degrees C for general purpose grades. Achieved through modified monomer ratios or addition of alpha-methylstyrene comonomer. Tensile strength is comparable to or higher than general purpose grades (45 to 55 MPa).

Applications: Automotive underhood components (air intake housings, fan shrouds, battery trays), electrical junction boxes exposed to elevated ambient temperatures, appliance components near heat sources, and any automotive interior component subject to sustained temperatures above 85 degrees C.

Grade examples:

• LG Chem LUPOS XR409H: High-heat grade; 110 degrees C HDT; automotive interior applications requiring heat resistance above standard ABS capability
• INEOS NOVODUR HH-112: 105 degrees C HDT; European automotive and industrial applications
• Trinseo MAGNUM 357HP: High-heat grade for automotive dashboard and underhood applications; low-emission specification available

When to choose it: Your application sees sustained temperatures above 85 degrees C. The standard test scenario is a parked vehicle in summer conditions: interior temperatures can reach 90 to 105 degrees C in hot climates. Any automotive interior component should be evaluated against this scenario using the HDT of your selected grade with an appropriate safety margin.

In the context of purchasing the materials of an acrylonitrile butadiene styrene plastic for an automotive component, a procurement team selected a default grade which was low-cost and available on a steady basis. Nonetheless, in the first six months after the introduction of the product, complaints from the Middle East market consumers came in. Arab countries are very hot, and consequently, the temperature in cars may climb much higher than 95 degrees Celsius inside while the cars are parked in the sun. In used parts, they started to distort. The problem with warranties was fixed by moving a top heat grade with a temperature of 110 degrees Celsius HDT. Unfortunately, to redress the situation, a new consideration was resources than would have been spent.

Flame Retardant ABS (UL94 V-0)

What it is: ABS grades formulated with flame retardant additives to achieve UL94 V-0 rating: burning stops within 10 seconds of two flame applications, and no flaming drips are produced. Standard ABS without flame retardant additive achieves UL94 HB at best, meaning it burns slowly in the horizontal position but is not self-extinguishing.

Applications: All electronics and electrical applications where UL94 compliance is specified. Connector housings, power tool enclosures, switch bodies, electrical panel components, charger housings, battery enclosures, and any consumer electronics sold in markets requiring documented flame retardancy.

Grade examples:

• Chi Mei POLYLAC PA-764: UL94 V-0 at 1.6 mm; 88 degrees C HDT; standard electronics flame retardant grade widely available in Asia-Pacific supply chains
• LG Chem LUPOS FR grades: V-0 rated; multiple thickness certifications available for electronics applications
• Formosa TAIRILAC flame retardant grades: Cost-competitive V-0 grades for consumer electronics production

Critical clarification on UL94 ratings:

UL94 thickness rating is dependent. A certified grade of V-0 at a thickness of 3.2 mm may not pass V-0 at 1.6 mm. For thin-wall electronics enclosures, e sure whether your selec et plastic is able to be certified to V I -0 according to the thickness of your wall. Obtain the Verification Card from your supplier, as opposed to a datasheet claim, for evidence. The Verification Card specifies the product, th ep grade and the thickness range in which this grade is certified.

When to choose it: Your product is destined for any market with UL94 compliance requirements, which includes the EU, North America, Japan, South Korea, and most regulated electronics markets globally. If your product requires CE marking, UL listing, or PSE certification, the enclosure material needs documented UL94 V-0 compliance at your design wall thickness.

Need help confirming which ABS grade meets your regulatory requirements? We stock Chi Mei POLYLAC and LG Chem LUPOS flame retardant grades with UL Recognition documentation. Contact us with your wall thickness and target market and we will confirm certification availability.

Additional ABS Grade Types Worth Knowing

Plating Grade ABS

This is one of the most used applications of Electroplated ABS especially in automobile inner finishing (chromed elements). The finishing grade of ABS is developed to provide a given surface’s configuration for efficient adhesion of chrome after deposition of nickel and chromium.

It should be noted that some acrylonitrile butadiene styrene plastic cannot be plated efficiently. Universal and high-impact grades cannot hold chrome well without being specially prepared through a plating-grade composition. Deviations from that standard in the design results in adhesion and coating failure.

• Chi Mei POLYLAC PA-717C: The most widely specified plating grade in Asia-Pacific automotive supply chains; documented chrome adhesion performance across major Tier 1 supplier qualification programs
• INEOS NOVODUR E 502 (plating variant): European automotive plating applications; processed according to supplier-specified surface treatment protocols

Transparent ABS (MABS)

Methyl methacrylate-acrylonitrile-butadiene-styrene terpolymer (MABS) grades provide optical clarity while maintaining the impact resistance of standard ABS. Used in medical device housings, consumer product windows, and display cases where visible-through ABS appearance is required.

• LG Chem LUPOS AT553: Transparent ABS grade; 97 degrees C HDT; medical device and consumer goods applications requiring clarity with ABS impact performance

Major Branded ABS Grades: Reference Table

The following branded ABS grades are available through China-based distribution channels with manufacturer COA documentation.

Verify all grade specifications against current manufacturer datasheets before specifying. Grade availability varies; confirm stock status with your supplier at the time of inquiry.

In case your OEM order or quality specification mentions usage of a certain grade brand, that specification will prevail. Even when direct properties of the material seem to be the same, brand interchanges are not allowed without requalification. In automotive supply chains, every change of a branded material is subject to a formal approval procedure by the OEM.

ABS Grade Selection by Industry Application

Electronics and Electrical Equipment

Plastics for electronics enclosures typically require flame retardance to UL94 V-0 first, followed by dimensional and aesthetic suitability. Consumer electronics manufacturers almost universally state that flame-retardant ABS (acrylonitrile butadiene styrene plastic), PA-764, or similar other grades are the minimum requirement for outer cases, as opposed to general-purpose grades only for ‘structural components’ encased under the visible part of the product case.

For electronics applications, confirm:

• UL94 V-0 rating at the wall thickness specified in your product design
• RoHS and REACH compliance for EU market electronics
• Dimensional stability in the temperature range the product encounters in shipping and storage, not just in-use conditions (shipping containers in summer can exceed 60 degrees C)

Automotive Interior Components

Automotive interior ABS specifications are typically the most demanding, covering thermal performance, VOC emission levels, gloss, and scratch resistance. Most European and North American OEM material specifications require:

• HDT greater than or equal to 100 degrees C for instrument panel components; greater than or equal to 105 degrees C for parts with direct sunlight exposure
• Low-emission certification (VDA 278 or equivalent) for interior components
• Specific gloss level ranges for Class A visible surfaces

Elevated temperature variants of acrylonitrile butadiene styrene plastic (such as HH112, XR409H) or any other equivalent are primarily used in automobile interiors. It is advised to first check with the original equipment manufacturer whether or not the material is approved before any orders for production are placed. In a majority of automotive supply chains, material approval documents are part of the contract, not some unnecessary quality check step.

Consumer Goods and Appliances

The most versatile and highly polished qualities lead it high in the list. It is of top quality when visible parts’ surface is under consideration, products handled or carried need severe impact resistance, or prices need to make sense in the large sever of competitive supply.

As far as household equipment is concerned (coffee makers, kitchen appliances, or fridge moldings), make sure the grade designated for the application has an FDA certification. Basic ABS is not suitable for food contact in its naked form. Some health-safety grades do exist while approved for direct food contact as well however, their ABS product portfolio is without them as default. It is important to check and ask to see the certificate from your supplier; ifet in food-safe claims, the grade but there is no certificate, it is not confirmed.

ABS Processing Parameters for Injection Molding

ABS is hygroscopic: it absorbs moisture from ambient air during storage and handling. Undried ABS produces surface defects including splay, blistering, and silver streaks that cannot be corrected after molding. Drying before processing is mandatory, not optional.

Standard processing parameters for ABS injection molding:

• Drying: 2 to 4 hours at 80 to 90 degrees C; moisture content below 0.1% before molding
• Melt temperature: 220 to 260 degrees C; typical range 235 to 245 degrees C
• Mold temperature: 50 to 80 degrees C (70 to 80 degrees C recommended for high-gloss surfaces)
• Injection pressure: 80 to 120 MPa
• Molding shrinkage: 0.4 to 0.7% (anisotropic; verify in gate-to-end direction for precision parts)

Processing windows for high-heat and fire-retardant grades are limited. Check the manufacturer’s processing manual for the processing parameters of the particular grade before configuring machine settings. Flame retardant acrylonitrile butadiene styrene plastic in isolation is very sensitive to the extent that processing temperatures above the maximum melt temperature can cause the breakdown of the flame retardant system.

ABS Limitations: What to Know Before Specifying

The goal of ABS is to provide a useful robust medium range of all physical properties. It cannot be advertise engineering thermoplastic that tops in performance in all aspects, and indeed it has some characteristic weaknesses that carry weight with some applications. In this case, the user is warned.

Resistance to UV rays: It is standard that ABS will disintegrate when exposed to UV radiation for long. After about 6 months use out of doors in the absence of UV stabilizer, the surface turns yellow. For such conditions, ASA (acrylonitrile styrene acrylate) should be used; not unwarranted of course. ASA is akin to ABS but structurally it has got stability to UV rays unlike ABS, behaves the same during processing and has good mechanical properties that can be used in outdoor conditions.

Solvent resistance: Acrylonitrile butadiene styrene plastic is not capable of supporting exposure to aromatic hydrocarbons, chlorinated solvents, esters, and ketones. If you are using any products containing these chemicals, for cleaning purposes or assembling a product using ABS, make sure there is no adverse chemical reaction before placing an order. This is of special concern when industries have to use products that are cleaned with solvent-based cleaners.

Continuous Service Temperature Limit: Ordinary ABS cannot be processed for service exceeding 80 degrees C. The higher heat ABS resins allow operation around the 100 degree C mark. For still higher ranges, take turns with either PC/ABS alloys, PA66 or PPS depending on the temperature range and the equipment design.

It is more helpful to be upfront with these restrictions at the outset than getting to know them after a failed produktion.

Sourcing ABS Resin from China: What Verification Looks Like

For international customers seeking acrylonitrile butadiene styrene plastic from China, this publication affirms that the branded saroma grades seen here PA-764, HI-121H and GP-22 are authentic Chi Mei, LG Chem and INEOS products respectively. It is the practice of swapping branded grades for low specification unnamed materials that presents salvage risks for an abs plastic supplier China operating.

Before placing a production volume order with any China-based ABS supplier, verify the following:

1. COA from the original manufacturer: The Certificate of Analysis should identify the brand name (Chi Mei, LG Chem, INEOS), the specific grade (PA-764, HI-121H, GP-22), and the production lot number. Cross-reference the Melt Flow Index (MFI) value on the COA against the published manufacturer datasheet for that grade. A significant deviation indicates either a non-conforming lot or a document not issued against the actual material.
2. UL94 certification documentation for flame retardant grades: Request the UL Recognition Card for the specific grade and wall thickness. A product listing claim of “V-0” is not equivalent to a UL-issued certificate. The Recognition Card shows the product family, certifying body, certified thickness range, and material identification.
3. Physical sample before volume commitment: Request 1 to 5 kg from the same lot as your planned order. Run the material through your injection molding process and compare melt behavior, surface finish, and part output against your qualified baseline. Any significant deviation in cycle time, fill behavior, or surface appearance warrants investigation before the full order proceeds.

At Yifuhui, we stock Chi Mei POLYLAC, LG Chem LUPOS, INEOS Styrolution TERLURAN/NOVODUR, and Formosa TAIRILAC ABS grades with manufacturer-issued COA documentation for every shipment. Minimum order starts at 25 kg across all grades, with FOB Shanghai as our standard export term.

Request an ABS grade recommendation with COA documentation — specify your application requirements and we will confirm grade availability and sample pricing within 24 hours.

Conclusion: Match the Grade to the Requirement

The ABS resin injection molding grade you specify determines whether your product meets its performance, safety, and compliance requirements from the start, or whether it requires re-qualification after market problems surface.

The selection framework is direct:

• No elevated temperature, no flame requirement: general purpose grade (PA-757, HI-121H, GP-22)
• Impact-critical applications or low-temperature service: high-impact grade (PA-747, XR401)
• Sustained temperatures above 85 degrees C: high-heat grade with HDT 105 to 125 degrees C (HH-112, XR409H)
• Any regulated electronics or electrical product: flame retardant grade with documented UL94 V-0 at your design wall thickness (PA-764 or equivalent)
• Electroplating requirement: plating grade (PA-717C)
• Optical clarity with ABS impact performance: transparent MABS grade (AT553)

Branded grade names provide the specificity your supplier, COA documentation, and quality system need to verify supply consistency across production lots. Generic “ABS resin” specifications do not.

Yifuhui maintains stock of branded ABS grades from Chi Mei, LG Chem, INEOS Styrolution, and Formosa Plastics, all with manufacturer-issued COA documentation and export from Port of Shanghai. Tell us your application requirements — operating conditions, wall thickness, target market, and regulatory needs — and we will identify the appropriate grade from our portfolio.

Contact Yifuhui for an ABS Grade Recommendation — Response Within 24 Hours

Frequently Asked Questions

What is the difference between general purpose ABS and high-impact ABS?

ABS grade commonly used for products with no high impact stipulation, such as Chi Mei PA-757 and LG. Chem HI-121H offers a balance of stiffness, surface aesthetics, and processability. High impact ABS (such as PA-747 or XR401) has more rubber as a dispersed phase which increases the Notched Izod Impact strength to 400 – 600 J/m, albeit at a small cost of tensile strength and Heat Deflection Temperature (HDT). Use the high-impact version if the product’s physical development stages involve drop tests, impact loads, or operation at low temperatures.

Are ABS Plastics Made To Meet UL94 V-0 Quality?

If this is something of a concern, standard ABS is generally HB rated under the UL94 scale, and so it will burn very easily horizontally and will not self-extinguish. The other requirement is to have a Wildfire ModGl Tikm Beige grade which is always cut into specific building products e.g. Chi Mei PA-764 or LG Chem FR grades. Should a particular project require UL94 V-0, it is essential to order a flame retardant grade, and ensure the prepared thickness meets such certification.

Is ABS UV resistant and if so, for how long?

Standard grades of acrylonitrile butadiene styrene plastic are not suitable for outdoor applications and prolonged exposure to ultraviolet light. Exposure to UV light faster than it would with UV enhanced acrylonitrile butadiene styrene plastic results in yellowing and embrittling of the surface aplique within a few months. When considering an application outdoors, citing ASA (acrylonitrile styrene acrylate) instead of conventional ABS will be appreciated. This is simply because ASA possesses similar processing and mechanical properties, but better UV weathering resistance, suitable for outdoor application purposes.

Which acrylonitrile butadiene styrene plastic types have shown FDA compliance for food contact applications?

Conventional acrylonitrile butadiene styrene plastic does not permit its direct contact with food. Only specified grades from some manufacturers have food approval (FDA compliant grades). It’s prudent to verify compliance by a given grade you are dealing with by requesting a compliance certificate from your supplier, rather than the family of materials.

How many cubic meters is the minimum order of ABS resin that has been offered by the Yifuhui?

At least 25 kgs in the case of every grade of ABS is allowed. It accounts for material qualification sampling and the first run of samples of the size prescribed for order confirmation is guaranteed from the same production batch, making the qualification tests representative of supply material.

How does ABS compare to PC for enclosure applications?

The acrylonitrile butadiene styrene plastic is processed more readily, price is lower and causes no problems with paint application. Impact resistance of polycarbonate (PC) is much greater (up to 900 J/m), heat deflection temperatures are significantly higher (120 to 140 degrees C), and the material is clear by nature. Polymers enclosing high-impact and -temperature must, however, use PC or PC/ABS composites since the more robust versions are limited to their particular grades.  For a detailed comparison, see our ABS vs PC material selection guide.