ASTM A335 P91 is the part of ASTM A335, The pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding. The steel material shall conform to chemical composition, tensile property, and hardness requirements.

The size of A335 P91 seamless tube

Outer Dimensions: 19.05mm - 114.3mm

Wall Thickness: 2.0mm - 14 mm

Length: max 16000mm

ASTM A335 P91 Chemical Compositions(%)

UNS Designa-tion K91560

C (max.) 0.08-0.12

Mn: 0.30-0.60

P(max.) 0.025

Si(max.) 0.50

Cr 4.00-6.00

Mo, 0.45-0.65

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