Download AS/NZS HA350 Data Sheet (PDF)
HA350 Steel Plate Technical Overview
HA350 steel plate delivers advanced structural strength with a guaranteed minimum yield strength of 350 MPa. In addition, TIASCO procures and processes this high-strength hot-rolled grade strictly to comply with AS/NZS 1594 specifications. Consequently, heavy fabricators gain superior load-bearing capacity, excellent impact toughness, and reliable cold formability for demanding structural projects. Therefore, this material performs exceptionally in both civil infrastructure and precision heavy sheet profiling.
Furthermore, precision roller-leveling equipment relieves internal residual stresses across every high-tensile plate and coil. As a result, the low-memory material maintains superior flatness during CNC fiber laser, plasma, and waterjet cutting. Accordingly, machine operators eliminate post-cutting distortion, severe edge lifting, and expensive rework.
Fabrication, Forming, and Welding Guidelines
Moreover, this grade offers outstanding weldability across standard industrial techniques—including GMAW (MIG), GTAW (TIG), and submerged arc welding (SAW)—despite its higher strength profile. Specifically, normal ambient shop temperatures require minimal preheating for standard plate thicknesses, effectively mitigating heat-affected zone (HAZ) cracking. For this reason, fabricators frequently select this grade for heavy structural cross-members, crane booms, and mining equipment.
Surface Quality and Galvanizing Suitability
Additionally, TIASCO supplies this material in diverse surface conditions, including black hot-rolled, pickled and oiled (P&O), and shot-blasted finishes. Furthermore, strict chemical batch controls maintain silicon and phosphorus contents within optimal metallurgical limits. Consequently, hot-dip galvanizers achieve uniform zinc-iron alloy layer growth, preventing excessive coating brittleness or mottled grey appearances.
Chemical Composition (Max Weight %)
| Carbon (C) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulfur (S) |
|---|---|---|---|---|
| ≤ 0.25 | ≤ 1.60 | ≤ 0.35 | ≤ 0.040 | ≤ 0.030 |
Mechanical & Physical Benchmarks
| Yield Strength | Tensile Strength | Elongation | Density |
|---|---|---|---|
| ≥ 350 MPa | ≥ 430 MPa | ≥ 20 % | 7.85 g/cm³ |
HA350 Steel Plate Dimensional Capabilities Matrix
| Parameters | Available Range / Formats |
|---|---|
| Thickness Capability | 1.2 mm up to 25.0 mm |
| Available Widths | 50 mm ~ 1865 mm (Standard: 1000, 1220, 1500, 1800 mm) |
| Length / Cutting Range | 500 mm up to 22,000 mm (Cut-to-length processing available) |
| Edge & Tolerances | AS/NZS 1365 Class A & B flatness; Mill Edge or Trimmed Edge |
TIASCO supplies full mill test certificates (EN 10204 3.1) with each shipment to guarantee melt heat traceability. In addition, our metallurgists directly review custom slitting, decoiling, and non-standard thickness inquiries. Submit your technical drawings to our Engineering Procurement Desk for a commercial quotation within 24 hours.
