Hot Rolled Abrasion Resistant AR400 Steel Plate – 3/4 Inch (AR400 Wear Plate)

Description

Our 3/4-inch (19mm) Hot Rolled Abrasion Resistant AR400 Steel Plate is a quenched-and-tempered (Q&T), through-hardened wear grade that delivers a nominal Brinell hardness of 360–440 HBW (target 400 HBW) – engineered to extend equipment life by 3 to 5 times compared to conventional structural carbon steel (e.g., A36) under high-impact and severe abrasive conditions.

Why AR400 for your application?

Backed by decades of metallurgical expertise and real-world field data, AR400 strikes the industry’s most practical balance between wear resistance, cold formability, and weldability. Unlike case-hardened plates, our Q&T process ensures uniform hardness from surface to core (≥90% of thickness), preventing premature failure in liner, chute, bucket, and conveyor applications.

Technical foundation (Expertise & Authority)

• Hardness test: ASTM E10 / A370 – each plate certified to 360–440 HBW.
• Chemistry (typical, wt%): C ≤0.20, Si ≤0.80, Mn ≤1.70, P ≤0.025, S ≤0.010, Cr ≤1.00, Ni ≤0.50, Mo ≤0.50, B ≤0.005 – low sulfur/phosphorus for reduced hydrogen cracking risk.
• Mechanical properties (3/4″ thickness): Yield strength ~965–1250 MPa (140–180 ksi); Tensile strength ~1200–1400 MPa (174–203 ksi); Elongation ~10–12% in 2″; Charpy V-notch ≥27 J at -40°C (longitudinal).
• Conformance: ASTM A6 (tighter than standard – 50% stricter flatness and thickness tolerances), EN 10204 Type 3.1/3.2 mill certificates available, plus third-party inspections (SGS, BV) upon request.

Proven field performance (Experience)

A mid‑western mining operator replaced 20mm mild steel chute liners (8‑week replacement cycle) with 12mm AR400 – achieving a 4x increase in wear life while reducing liner weight by 60%, cutting downtime and maintenance costs significantly. Similarly, contractors in northern winter conditions (‑40°C) report reliable impact toughness without brittle fracture.

Fabrication guidelines – expert-backed

• Cutting: Plasma/laser for ≤80mm; oxy-fuel for >80mm (remove HAZ by grinding 1–2mm if hardness retention is critical).
• Welding: Low‑hydrogen practices (SMAW, GMAW, SAW) with AWS E7018/E80XX-H4. Preheat to 100–150°C when plate >25mm or high restraint; interpass ≤200°C. Never exceed 175°C preheat to avoid softening. Slow cooling recommended.
• Cold bending: Minimum radius 3–4× plate thickness (across grain), 4–5× (with grain). Die opening 12–14× thickness. For tight radii, warm forming at 150–200°C is allowed – but avoid overheating beyond 200°C.
• Machining: Carbide tooling recommended; use ample coolant to prevent heat build‑up.

AR400 vs AR450 vs AR500 – expert selection guidance

For most material handling and construction equipment, AR400 is the “sweet spot” – offering significant wear life extension without sacrificing fabrication flexibility.

Quality assurance & traceability (Trustworthiness)

• Every plate is heat‑treated in certified furnaces with continuous temperature monitoring.
• Each batch receives Brinell hardness verification (multiple locations) and full chemistry/metallurgical report.
• We provide full mill traceability – from ladle analysis to final dimensional inspection.
• All plates are marked with heat number, grade, and thickness for complete job‑site traceability.

Logistics & value‑added services

• Standard sizes: 3/4″ thickness, widths 48″–120″, lengths up to 480″. Custom sizes available.
• Surface: mill finish (descaling/shot blasting optional).
• Just‑in‑time delivery and custom processing: precision cutting, drilling, countersinking, bending, and edge preparation – ready to install.
• Storage and shipping: plates are stored flat, dry, and protected; lifting with nylon slings to prevent edge damage.

* Specifications are typical and subject to change without notice. Actual mill certificates govern final properties.