Mild Steel 350HR Laser Cutting Australia

What is Mild Steel 350HR?

Mild Steel 350HR is a hot-rolled structural steel plate and sheet manufactured to AS/NZS 3678 Grade 350. The 350 designation refers to its minimum yield strength of 350 MPa, making it significantly stronger than Grade 250 while remaining cost-effective and widely available across Australia.

It is available in sheet and plate form and cuts cleanly on modern fibre laser systems, producing burr-minimal edges with tight dimensional tolerances across the full thickness range.

Why Choose 350HR for Laser Cutting?

• Higher strength than 250HR — allows thinner sections without sacrificing load capacity
• Excellent weldability — suitable for MIG, TIG, and structural welding
• Consistent material properties — reliable performance across production runs
• Wide availability — stocked in standard sheet and plate sizes across Australia
• Cost-effective — higher strength at minimal cost premium over 250HR

Available Thicknesses

Ferracut laser cuts Mild Steel 350HR from thin gauge sheet up to 20mm plate. Common thicknesses include 1mm, 1.6mm, 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, and 20mm.

Tolerances and Edge Quality

Fibre laser cutting of 350HR mild steel achieves positional tolerances of ±0.1mm on standard thicknesses up to 6mm. Thicker sections (8–20mm) maintain tolerances of ±0.2mm. Cut edges are clean and square with minimal heat-affected zone. Oxygen assist gas is used for thicker sections to maintain cutting speed and edge quality.

Common Applications

• Structural brackets and gussets
• Machine frames and bases
• Mining and agricultural equipment components
• Trailers, chassis, and tow bars
• Industrial shelving and racking
• Mezzanine floor components
• Custom fabrication and prototyping

File Preparation Tips for 350HR

• Draw at 1:1 scale in millimetres using DXF or DWG format
• Close all open paths before uploading — open paths cause cutting errors
• Minimum hole diameter should equal material thickness (e.g. 6mm hole in 6mm plate)
• Allow at least 2× material thickness between adjacent cut features
• Remove all dimensions, annotations, and title blocks before export

Services Available for Mild Steel 350HR

• Laser cutting — instant online quote, no minimum order
• Bending — instant online quote via the portal
• Welding, assembly, powder coating, tapping — email store@magaholdings.com.au

Get an Instant Quote

Upload your DXF or DWG file to Ferracut's online portal and receive a price for your Mild Steel 350HR parts in under 30 seconds. No minimum order quantity, no account required.

Mild Steel 350HR Laser Cutting Australia thickness guides

Tolerances, minimum feature sizes and typical uses for each thickness we cut:

• 1mm Mild Steel Laser Cutting
• 1.5mm Mild Steel Laser Cutting
• 2mm Mild Steel Laser Cutting
• 3mm Mild Steel Laser Cutting
• 4mm Mild Steel Laser Cutting
• 5mm Mild Steel Laser Cutting
• 6mm Mild Steel Laser Cutting
• 8mm Mild Steel Laser Cutting
• 10mm Mild Steel Laser Cutting
• 12mm Mild Steel Laser Cutting