A335 Grade P21 K31545 - ASTM A335/A335M-2024(b)

Grade	A335 Grade P21
USA UNS	K31545
Corresponding Standard	ASTM A335/A335M-2024(b) Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
Classification	Alloy Steel

A335 Grade P21 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	0.05	-	0.3	-	-	2.65	0.8
Maximum Value	0.15	0.5	0.6	0.025	0.025	3.35	1.06

A335 Grade P21 Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
full or isothermal anneal or normalize and temper （≥675°C）	≥415	≥205	l: ≥30；t: ≥20

l=longitudinal；t=transverse

A335GradeP21 Corresponding Standards(Same grade name, different standards)

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