December 15, 2023 By Sen LiangAMP Leave a CommentAMP
A532-Class II Casting PartsSMI supplies casting parts manufactured to ASTM A532 Class II specification — high-chromium white iron castings for wear-critical applications in mining, aggregate processing, cement production and heavy material handling. ASTM A532 Class II is a recognised international standard for abrasion-resistant cast irons, specifying high-chromium white iron compositions typically in the 15–25% chromium range, with hardness values that make it the material of choice for the most demanding wear environments in heavy industry.
SMI does not produce the A532 material itself — we manufacture precision castings to this specification, applying controlled casting practice, heat treatment and dimensional inspection to produce parts that meet the mechanical and geometric requirements of each application. Custom dimensions, configurations and surface treatments are available.
ASTM A532 is the standard specification for abrasion-resistant cast irons. Class II within this standard covers high-chromium white iron compositions, characterised by:
The European equivalent designation is the DIN GX260Cr27 family — high-chromium cast irons with chromium content around 27% and hardness typically ≥500 HB. SMI has manufacturing experience with both ASTM and DIN specification high-chromium white iron castings, and can produce to customer-specified standards where required.
High-chromium white iron is the standard material specification for wear-critical components in gyratory, cone and jaw crushers — including crusher liners, mantles, concaves and blow bars. The combination of high hardness and chromium carbide microstructure resists the abrasive wear generated by rock and ore crushing at high compressive loads.
Ball mill and SAG mill liners in mining and cement operations are among the highest-wear components in mineral processing. A532 Class II castings provide the abrasion resistance required for extended liner service life in high-throughput grinding applications.
Slurry pump wet-end components — impellers, volute liners, throatbushes — operate in highly abrasive slurry environments where high-chromium white iron provides significantly longer service life than standard cast iron or carbon steel alternatives. Chute liners, deflector plates and impact wear surfaces in bulk material handling systems are further applications.
Additional applications include roller press rolls and wear segments, excavator wear parts, and other high-load, high-impact components where the abrasion resistance of high-chromium white iron is the determining material selection criterion.
SMI casting parts to ASTM A532 Class II specification are produced under controlled manufacturing conditions covering:
| Parameter | Details |
|---|---|
| Material standard | ASTM A532 Class II high-chromium white iron |
| Equivalent standard | DIN GX260Cr27 and related high-chromium cast iron designations |
| Chromium content | Typically 15–25% (ASTM A532 Class II range) |
| Hardness | Typically 600–800 HV; ≥500 HB for DIN equivalent grades |
| Heat treatment | Destabilisation and sub-critical anneal — confirmed by hardness test |
| Dimensions | Custom — manufactured to customer drawing or specification |
| Quality documentation | Dimensional inspection report, hardness test certificate — standard with every order |
| Industries served | Mining, aggregate, cement, mineral processing, heavy material handling |
SMI A532 Class II casting parts are in active service across mining, aggregate and cement operations in multiple continents, including supply to some of the world’s largest mining and mineral processing groups. All supply relationships are subject to confidentiality agreements. Reference accounts are available to qualified buyers under appropriate confidentiality terms.
For detailed technical information on crusher wear parts, grinding mill liners and material handling wear components — including full product specifications, dimensional data and application engineering support — please visit SMI’s dedicated mining components platform:
To enquire about A532 Class II casting parts for your application, please provide the following:
SMI will respond with a written technical assessment and commercial proposal. Contact SMI — A532 Class II Casting Parts Enquiry →AMP