Leading Stockist of Alloy Steel Pipes, Fittings and Flanges

A333 Grade 3 Pipe 3.5% Nickel

ASTM/ASME A/SA 333 Grade 3 Pipe 3.5% Nickel

We stock seamless pipe 1/2" up to 18" for Low Temperature service and other other applications with required notch toughness.

Our range covers wall thicknesses s20 through to s160, STD (Standard), XS (Extra Strong) and XXS (Double Extra Strong). Availability determined by diameter.

All seamless pipe is ordered dual certified according to ASTM/ASME A/SA 333/3, with additional requirements to MESC SPEC 74/004.

Certification is EN10204 3.1 and conforms to NACE MR-01-03, NACE MR-01-75 and PED 97/23/EC. All pipe is impact tested at -101°c with minimum single values of 21J and a minimum average of 27J. We also have a range of pipes which are additionally impact tested at -105°c. 

Element Composition %
Carbon 0.19 MAX
Manganese 0.31-0.64
Phosphorus 0.025 MAX
Sulfur 0.025 MAX
Silicon 0.18-0.37
Nickel 3.18-3.82


  Tensile Requirements
psi MPa
Tensile Strength, min 65 000 450
Yield Strength, min 35 000 240



We also carry Welded pipe which is a direct equivalent of A333 Grade 3, currently with a limited number of sizes and wall thicknesses from 18" to 36" according to A671 CF66 (A203 CF65 Gr.D)

Element Composition %
Carbon 0.17 MAX
Manganese 0.70 MAX
Phosphorus 0.035 MAX
Sulfur 0.035 MAX
 Heat analysis 0.15-0.40
Product Analysis 0.13-0.45
Heat Analysis 3.25-3.75
Product Analysis 3.18-3.82


  Tensile Requirements
ksi MPa
Tensile Strength, min 65-85 450-485
Yield Strength, min 37 255


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