XM-12 S15500 - ASTM A564/A564M-2019

Grade	XM-12
USA UNS	S15500
Corresponding Standard	ASTM A564/A564M-2019(a) Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
Classification	Precipitation-Hardening Stainless Steel
Properties	Corrosion Resistance

XM-12 Chemical Element Composition Content (%)

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

XM-12 Mechanical Properties

condition	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	Impact Energy Absorption KV2 J
Steel	Solution treatment (A): 1040±15°C (cool to below 32°C)					HRC: ≤38 HB: ≤363
Steel; t≤300 (longitudinal)	Quenching and/or aging (H900): 480°C, hold for 1h, air cooling	≥1310	≥1170	≥10	≥35	HRC: ≥40 HB: ≥388
Steel; t≤300 (transverse)	Quenching and/or aging (H900): 480°C, hold for 1h, air cooling	≥1310	≥1170	≥6	≥15	HRC: ≥40 HB: ≥388
Steel; t≤300 (longitudinal)	Quenching and/or aging (H925): 495°C, hold for 4h, air cooling	≥1170	≥1070	≥10	≥38	HRC: ≥38 HB: ≥375	≥6.8
Steel; t≤300 (transverse)	Quenching and/or aging (H925): 495°C, hold for 4h, air cooling	≥1170	≥1070	≥7	≥20	HRC: ≥38 HB: ≥375
Steel; t≤300 (longitudinal)	Quenching and/or aging (H1025): 550°C, hold for 4h, air cooling	≥1070	≥1000	≥12	≥45	HRC: ≥35 HB: ≥331	≥20
Steel; t≤300 (transverse)	Quenching and/or aging (H1025): 550°C, hold for 4h, air cooling	≥1070	≥1000	≥8	≥27	HRC: ≥35 HB: ≥331	≥14
Steel; t≤300 (longitudinal)	Quenching and/or aging (H1075): 580°C, hold for 4h, air cooling	≥1000	≥860	≥13	≥45	HRC: ≥32 HB: ≥311	≥27
Steel; t≤300 (transverse)	Quenching and/or aging (H1075): 580°C, hold for 4h, air cooling	≥1000	≥860	≥9	≥28	HRC: ≥32 HB: ≥311	≥20
Steel; t≤300 (longitudinal)	Quenching and/or aging (H1100): 595°C, hold for 4h, air cooling	≥965	≥795	≥14	≥45	HRC: ≥31 HB: ≥302	≥34
Steel; t≤300 (transverse)	Quenching and/or aging (H1100): 595°C, hold for 4h, air cooling	≥965	≥795	≥10	≥29	HRC: ≥31 HB: ≥302	≥20
Steel; t≤300 (longitudinal)	Quenching and/or aging (H1150): 620°C, hold for 4h, air cooling	≥930	≥725	≥16	≥50	HRC: ≥28 HB: ≥277	≥41
Steel; t≤300 (transverse)	Quenching and/or aging (H1150): 620°C, hold for 4h, air cooling	≥930	≥725	≥11	≥30	HRC: ≥28 HB: ≥277	≥27
Steel; t≤300 (longitudinal)	Quenching and/or aging (H1150M): 60°C, hold for 2h, air cooling + 620°C, hold for 4h, air cooling	≥795	≥515	≥18	≥55	HRC: ≥24 HB: ≥255	≥75
Steel; t≤300 (transverse)	Quenching and/or aging (H1150M): 60°C, hold for 2h, air cooling + 620°C, hold for 4h, air cooling	≥795	≥515	≥14	≥35	HRC: ≥24 HB: ≥255	≥47

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

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