A335 Grade P911 K91061 - ASTM A335/A335M-2024(b)

Grade	A335 Grade P911
USA UNS	K91061
Corresponding Standard	ASTM A335/A335M-2024(b) Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
Classification	Alloy Steel

A335 Grade P911 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	N	Ti	W	V	Nb	Zr	B	Al
Minimum Value	0.09	0.1	0.3	-	-	8.5	-	0.9	0.04	-	0.9	0.18	0.06	-	0.0003	-
Maximum Value	0.13	0.5	0.6	0.02	0.01	9.5	0.4	1.1	0.09	0.01	1.1	0.25	0.1	0.01	0.006	0.02

A335 Grade P911 Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
Normalizing（1040~1080°C） + Tempering（740~780°C）	≥620	≥440	l: ≥20	HBW: ≤250 HV: ≤265 HRC: ≤25

l=longitudinal；t=transverse

A335GradeP911 Corresponding Standards(Same grade name, different standards)

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