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Hot-Rolled Pickled & Oiled HR350

Tube Sizes and Specifications

Hot-Rolled Pickled & Oiled | HR350 Specifications

Base Material

Produced from New Zealand made, hot-rolled, pickled, and oiled steel coil.

Key Benefits

  • HR350 provides a clean, consistent semi-bright finish thanks to pickling, oiling, and skin-passing, with OD accuracy comparable to CR250.
  • The higher yield strength delivers improved performance in brackets, supports, frames, and other applications exposed to greater physical loads.
  • Excellent dimensional stability and weldability make it suitable for a wide range of medium-duty fabrications.

Precision HR350 Tube Size Tables

HR350 Round Tube Sizes
HR350 Square Tube Sizes
HR350 Specifications
Base Material Hot-rolled pickled & oiled (TUBE 300 Hot-Rolled)
Yield Strength 285MPa (BM)
Tensile Strength 380 MPa (BM)
Base Material Standard (HRPO): AS/NZS 1365:1996 (R2016).
Product standard AS 1450
Surface Finish Steel grey, semi-bright finish
Coating Suitability Excellent for Paint and Hot Dip Galvanising Good for Powder Coating and Electroplating Poor for Chrome Plating
Standard stocked lengths 5.5m. Custom lengths available.
Tube Profile Round, Square, Rectangle, Flat-Sided Oval, Oval
Tube Thickness From 2.0mm to 2.5mm
Size Range - Round From 25.4mm to 44.5mm
Size Range - Square From 19.1mm to 31.8mm
Typical Applications: Racking, cargo barriers, seat frames
HRPO Base Material - Typical Mechanical Properties
Yield strength Tensile strength EI % on Lo=50mm
285 MPa 380 MPa 30

Precision Tube HR350 Sizing - Round

HR350 Round Tube
Size (mm) Product Type & Gauge (mm) Finish Nom Linear mass (kg/m) Length
per pack
HR350 (Gauge displayed for Stocked Lines) 1.2 1.4 1.6 2.0
25.4 2.5 0.71 0.83 0.93 1.15 100
31.8 2.5 0.87 1.04 1.17 1.43 48
38.1 2.5 0.87 1.04 1.17 1.43 48
44.5 2.5 1.06 1.49 1.65 2.03 48

Precision Tube HR350 Sizing - Square

HR350 Square Tube
Size (mm) Product Type & Gauge (mm) Finish Nom Linear mass (kg/m) Length
per pack
HR350 (Gauge displayed for Stocked Lines) 1.2 1.4 1.6 2.0
19.1 x 19.1 2.0 0.64 0.75 0.83 1.00 100
25.4 x 25.4 2.5 0.89 1.03 1.17 1.42 100
31.8 x 31.8 2.5 1.11 1.31 1.48 1.79 50
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