Standard Grade* Yield Strength Tensile Strength CHS RHS & SHS
    MPa (min) MPa (min) <15 15-30 >30 <15 15-30 >30
AS1163 C250/C250L0 250 320 18 20 22 14 16 18
  C350/C350L0 350 430 16 18 20 12 14 16
  C450/C450L0 450 500 12 14 16 10 12 14

Characteristic Pipe (CHS) Rectangular & Square (RHS / SHS)
External dimensions (d, b, d0) ±1% with minimum of ±0.5mm& maximum ±10% ±1% with minimum of ±0.5mm
Thickness (t) d≤406.4mm ±10% ±10%
  d>406.4mm ±10% with max of ±2mm  
All Sections has a mass not less than 96% of specified nominal mass

Characteristic All Sections
Corner Radius ≤50x50mm equivalent perimeter 1.5t to 3t
Corner Radius >50x50mm equivalent perimeter 1.8t to 3t
Twist (v) ≤2mm ±0.5mm/m length
Concavity / Convexity Max 0.8% or 0.5mm, whichever is greater
Squareness 90 ± 1°
  Pipe (CHS) Rectangle & Square (RHS/SHS)
Straightness 0.20% of total length 0.15% of total length0.15% of total length