A135 Grade A & B Tubing

Valmont Tubing produces round electric resistance welded (ERW) steel tubing to meet ASTM specifications A135 Grade A and Grade B, often used in the conveying of gas, vapor, water or other liquids. Valmont produces pipe and tubing sizes up to 12" NPS (12.75" OD) and in wall thicknesses up to 0.280" nominal that meet the requirements called out for in A135.

For a complete listing of all tubing sizes produced by Valmont, please visit our Steel Tubing Product Catalog.

Below are the chemical and physical testing analysis that differentiates A135 Grade A from Grade B.

ASTM A135 Grade A

Feature GradeA
Yield Strength (psi) 30,000 min
Tensile Strength (psi) 48,000 min
Elongation % Determined by formula
Hydrostatic(psi) if required Determined by formula
Carbon % 0.25 max
Manganese % 0.95 max
Phosphorous % 0.035 max
Sulfur % 0.035 max

ASTM A135 Grade B

Feature Grade B
Yield Strength (psi) 35,000 min
Tensile Strength (psi) 60,000 min
Elongation % Determined by formula
Hydrostatic(psi) if required Determined by formula
Carbon % 0.30 max
Manganese% 1.20 max
Phosphorous % 0.035 max
Sulfur % 0.035 max

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