615 S41800 - ASTM A565/A565M-2010(R2025)

Grade	615
USA UNS	S41800
Corresponding Standard	ASTM A565/A565M-2010(R2025) Martensitic Stainless Steel Bars for High-Temperature Service
Classification	Martensitic Stainless Steel

615 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	W
Minimum Value	0.15	-	-	-	-	12	1.8	-	2.5
Maximum Value	0.2	0.5	0.5	0.04	0.03	14	2.2	0.5	3.5

615 Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
	HT - Heat treated (for high-temperature service)	≥965	≥760	≥15	≥45	302~352
	A - Annealed	/	/	/	/	≤311

* Hardness taken at the surface for control purposes only. For acceptance purposes, tensile properties govern.

① HT - Heat treated (for high-temperature service)：1800 to 1850°F [980 to 1010°C], quench in air or oil and double temper at 1150°F [620°C] min for 2 h min for each tempering treatment.

615 Corresponding Standards(Same grade name, different standards)

1	ASTM A565/A565M-2010(R2017)
	615 S41800
2	ASTM A959-2019
	615 S41800
3	ASTM A565/A565M-2010(R2025)
	615 S41800

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