ASTM A335 is American standard special seamless ferritic alloy steel pipe for high temperature services. ASTM A335 seamless pipes following this specification should be suitable for bending, similar forming operations and fusion welding. The choice depends on design, service conditions, mechanical properties and high temperature features.

ASTM A335 Various Grades

ASTM A335 alloy steel plate

ASTM A335 this standard covers seamless ferritic alloy steel pipes for high temperature. So the steel material shall cohere with chemical composition, tensile property and hardness requirements. Every pipe length should be subjected to the hydrostatic test. And each pipe shall be examined by a non-destructive examination way on the bases of required practices. The main grades of ASTM A335 include P11, P22, P5, P9, P91 and P92. Anson steel an experience exporter over ten years provides various grades of ASTM A335 to meet customers’ requirements.

ASTM A335 at Anson Steel

ASTM A335 seamless steel pipe

Chemical Composition for Main Grades (%)
ASTM A335 P11, P22, P5, P9, P91, P92

Grade C Mn P, S, max Si Cr Mo
P11 0.05-0.15 0.30-0.60 0.025 0.50-1.00 1.00-1.50 0.44-0.65
P22 0.05-0.15 0.30-0.60 0.025 0.50 max 1.90-2.60 0.87-1.13
P5 0.15 max 0.30-0.60 0.025 0.50 max 4.00-6.00 0.45-0.65
P9 0.15 max 0.30-0.60 0.025 0.25-1.00 8.00-10.00 0.90-1.10
P91 0.08-0.12 0.30-0.60 0.020/0.010 0.20-0.50 8.00-9.50 0.85-1.05
V 0.18-0.25 N 0.03-0.07 Ni 0.40 max Al 0.02 max Nb 0.06-0.10 Ti 0.01 max
P92 0.07-0.13 0.30-0.60 0.020/0.010 0.50 max 8.50-9.50 0.30-0.60
V 0.15-0.25 N 0.03-0.07 Ni 0.40 max Al 0.02 max Nb 0.04-0.09 W 1.50-2.00
B 0.001-0.006 Ti 0.01 max Zr 0.01 max

Mechanical Properties

Data Tensile strength, min, (MPa) Yield strength, min, (MPa) Elongation, min, (%), L/T Heat Treatment
Grade P11, P22, P5, P9 415 205 30/20 A / N+T
Grade P91 585 415 20/… N+T / Q+T
Grade P92 620 440 20/… N+T

Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.

Inspection and Test:
Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.
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