AR400 Steel Plate – Abrasion-Resistant Alloy Steel for Mining & Construction

AR400 steel plate is a premium-grade abrasion-resistant alloy steel specifically engineered for applications demanding exceptional wear resistance and structural durability. With a nominal surface hardness of 400 Brinell (BHN), this high-carbon alloy steel delivers superior performance in mining equipment, aggregate processing machinery, construction vehicles, and material handling systems where impact and abrasive wear are primary concerns. Manufactured to strict tolerances per ASTM A514 guidelines, AR400 plate combines robust mechanical strength with excellent formability, making it the preferred choice for fabricators serving heavy industries worldwide.

What is AR400 Steel Plate?

AR400 steel plate is a through-hardened carbon alloy steel with a surface hardness range of 360-440 BHN, designed specifically to resist abrasive wear in high-stress industrial environments. The designation "AR" stands for Abrasion Resistant, while "400" indicates the nominal Brinell hardness number. This material features a carefully balanced chemical composition including carbon (0.15-0.35%), manganese (0.75-1.50%), and trace alloying elements that provide optimal hardness without sacrificing weldability or formability.

AR400 Steel Plate Technical Specifications

AR400 plate typically exhibits a tensile strength of 1,200-1,450 MPa (174-210 ksi) with yield strength exceeding 1,000 MPa minimum. The material density measures 7.85 g/cm³ at room temperature. Standard thickness ranges from 3.0 mm to 100 mm, with width availability up to 3,000 mm and lengths extending to 12,000 mm. Chemical composition complies with proprietary mill specifications, featuring carbon content between 0.15-0.35% maximum, manganese 0.75-1.50%, phosphorus 0.025% max, and sulfur 0.010% max, ensuring consistent hardness penetration throughout the plate thickness.

Key Advantages of AR400 Abrasion-Resistant Steel

This through-hardened alloy steel offers exceptional resistance to gouging, scratching, and impact wear, extending equipment service life by 300-500% compared to mild structural steels. AR400 plate maintains superior dimensional stability during fabrication processes, exhibits good cold-forming characteristics when proper techniques are employed, and provides cost-effective wear protection in bulk material handling applications. The material's consistent hardness profile from surface to core ensures uniform wear patterns and predictable performance throughout the component lifecycle.

Primary Applications in Heavy Industry

AR400 steel plate finds extensive application in mining industry equipment including crusher liners, chute liners, conveyor skid plates, and hopper liners where coal, ore, and aggregate materials cause severe abrasive wear. Construction sector applications encompass dump truck bodies, bulldozer blades, loader buckets, and excavator wear plates. The material serves critical roles in cement plant equipment, recycling machinery wear components, and agricultural tillage implements requiring exceptional durability against soil abrasion and rock impact.

Fabrication and Welding Considerations

AR400 plate requires preheating to 150-260°C (300-500°F) before welding operations, with interpass temperatures maintained between 150-315°C to prevent cracking in the heat-affected zone. Low-hydrogen electrodes such as E7018 or E11018 are recommended for shielded metal arc welding, while flux-cored wires like E71T-1 provide excellent results in semi-automatic processes. Plasma cutting, oxy-fuel cutting, and laser cutting methods are all suitable for AR400, though cutting speeds should be reduced by approximately 20-30% compared to mild steel processing parameters. Post-weld stress relief at 595-650°C for one hour per 25 mm of thickness optimizes joint integrity for critical structural applications.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard minimum order quantity for AR400 steel plate is 5 metric tons per specification, though we accommodate smaller quantities for established customers with specific project requirements. Mixed-grade orders combining AR400 with complementary wear-resistant grades may qualify for reduced MOQ thresholds, subject to mill availability and production scheduling constraints.

Do you provide material test certificates?

Yes, we supply comprehensive Mill Test Certificates (MTC) per EN 10204 Type 3.1 documentation with every AR400 plate shipment, detailing chemical composition analysis, mechanical property test results including tensile strength and hardness readings, heat treatment records, and dimensional inspection reports. Third-party inspection certificates from agencies such as SGS, Bureau Veritas, or Lloyd's Register can be arranged upon request for quality assurance verification.

What is the typical delivery time?

Standard delivery timeframes for AR400 steel plate range from 15-25 business days for stock thickness specifications (6mm-50mm) and 30-45 days for non-standard thicknesses requiring mill production runs. Express processing options are available for urgent project requirements, with expedited delivery achievable within 7-10 business days for select dimensions subject to inventory availability and transportation logistics coordination.

Can you cut to custom sizes?

We provide comprehensive value-added processing services including precision plasma cutting, oxy-fuel flame cutting, and waterjet cutting to customer-specified dimensions with tolerances of ±2mm for linear cuts. Additional fabrication capabilities encompass CNC machining, drilling, countersinking, beveling, and edge preparation to facilitate direct installation. CAD/CAM file formats including DXF, DWG, and STEP are accepted for complex geometry requirements, ensuring accurate part production aligned with engineering specifications.

Get a Competitive Quote for AR400 Steel Plate

Request factory-direct pricing for AR400 abrasion-resistant steel plate tailored to your project specifications. Our technical sales team provides comprehensive support including material selection guidance, fabrication recommendations, and logistics coordination to ensure optimal cost-performance outcomes. Contact us today with your thickness, dimensions, quantity requirements, and delivery location to receive a detailed quotation within 24 hours, backed by our commitment to mill-certified quality and reliable supply chain performance.