A335 Grade P91 Type2 K91560 - ASTM A335/A335M-2018

Grade	A335 Grade P91 Type2
USA UNS	K91560
Corresponding Standard	ASTM A335/A335M-2018 Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
Classification	Alloy Steel

A335 Grade P91 Type2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	As	N	Ti	W	V	Nb	Zr	B	Al	Sn	Sb	More
Minimum Value	0.08	0.2	0.3	-	-	8	-	-	0.85	-	0.035	-	-	0.18	0.06	-	-	-	-	-	N/Al≥ 4
Maximum Value	0.12	0.4	0.5	0.02	0.005	9.5	0.2	0.1	1.05	0.01	0.07	0.01	0.05	0.25	0.1	0.01	0.001	0.02	0.01	0.003	N/Al≥ 4

A335 Grade P91 Type2 Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
Heat Treatment	≥585	≥415	l: ≥20	HBW: 190~250 HV: 196~265 91HRBW~25HRC

The elongation data measured by wall thickness of the material and the material heat treatment system are not listed in the table, and the detailed data are in the original

New and Old Grade Replacement List

Corresponding Standard	Grade
ASTM A335/A335M-2018	Grade USA UNS
ASTM A335/A335M-2024(b)	Grade USA UNS

A335GradeP91Type2 Corresponding Standards(Same grade name, different standards)

1	ASTM A335/A335M-2018
	A335 Grade P91 Type2 K91560
2	ASTM A335/A335M-2024(b)
	A335 Grade P91 Type 2 K90901

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!