XM-12 S15500 - ASTM A693-2013

Grade	XM-12
USA UNS	S15500
Corresponding Standard	ASTM A693-2013 Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
Classification	Precipitation-Hardening Stainless Steel

XM-12 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	More
Minimum Value	-	-	-	-	-	14	3.5	2.5	Nb+Ta：0.15~0.45
Maximum Value	0.07	1	1	0.04	0.03	15.5	5.5	4.5	Nb+Ta：0.15~0.45

XM-12 Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
0.038≤t＜101.6	Solid Solution Treatment					(HRC) ≤38
t<4.762	Precipitation Hardening, 482℃	≥1310	≥1170	≥5		HRC 40~48
4.762＜t＜15.88	Precipitation Hardening, 482℃	≥1310	≥1170	≥8	≥25	HRC 40~48
15.9＜t＜102	Precipitation Hardening, 482℃	≥1310	≥1170	≥10	≥30	HRC 40~48
t<4.762	Precipitation Hardening, 496°C	≥1170	≥1070	≥5		HRC 38~46
4.762＜t＜15.88	Precipitation Hardening, 496°C	≥1170	≥1070	≥8	≥25	HRC 38~47
15.9＜t＜102	Precipitation Hardening, 496°C	≥1170	≥1070	≥10	≥30	HRC 38~47
t<4.762	Precipitation Hardening, 552°C	≥1070	≥1000	≥5		HRC 35~43
4.762＜t＜15.88	Precipitation Hardening, 552°C	≥1070	≥1000	≥8	≥30	HRC 33~42
15.9＜t＜102	Precipitation Hardening, 552°C	≥1070	≥1000	≥12	≥35	HRC 33~42
t<4.762	Precipitation Hardening, 579°C	≥1000	≥860	≥5		HRC 31~40
4.762＜t＜15.88	Precipitation Hardening, 579°C	≥1000	≥860	≥9	≥30	HRC 29~38
15.9＜t＜102	Precipitation Hardening, 579°C	≥1000	≥860	≥13	≥35	HRC 29~38
t<4.762	Precipitation Hardening, 593°C	≥965	≥790	≥5		HRC 31~40
4.762＜t＜15.88	Precipitation Hardening, 593°C	≥965	≥790	≥10	≥30	HRC 29~38
15.9＜t＜102	Precipitation Hardening, 593°C	≥965	≥790	≥14	≥35	HRC 29~38
t<4.762	Precipitation Hardening, 621℃	≥930	≥725	≥8		HRC 28~38
4.762＜t＜15.88	Precipitation Hardening, 621℃	≥930	≥725	≥10	≥35	HRC 26~36
15.9＜t＜102	Precipitation Hardening, 621℃	≥930	≥725	≥16	≥40	HRC 26~36
t<4.762	Precipitation Hardening, 760°C + 621°C	≥790	≥515	≥9		HRC 26~36
4.762＜t＜15.88	Precipitation Hardening, 760°C + 621°C	≥790	≥515	≥11	≥40	HRC 24~34
15.9＜t＜102	Precipitation Hardening, 760°C + 621°C	≥790	≥515	≥18	≥45	HRC 24~34

1 Approximate Comparison Table Precipitation Hardening Stainless Steel

China	United States			Germany	European Standard
GB	ASTM	UNS	SAE	W-Nr.	EN
0Cr15Ni5Cu4Nb	S15500	XM12	15-5PH	1.4545	X5CrNiCuNb15-5

2 Approximate Comparison Table Precipitation Hardening Stainless Steel

China		United States
GB	ISC	ASTM	UNS
05Cr15Ni5Cu4Nb (0Cr15Ni5Cu4Nb) GB/T 20878-2024	S51550	XM-12 ASTM A959	S15500

XM-12 Corresponding Standards(Same grade name, different standards)

1	ASTM A959-2004
	XM-12 S15500
2	ASTM A564/A564M-2019(a)
	XM-12 S15500
3	ASTM A693-2013
	XM-12 S15500
4	ASTM A959-2019
	XM-12 S15500
5	ASTM A705/A705M-2023
	XM-12 S15500

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