XM-12

XM-12 Alloys are designed to have greater than17-4 PHof toughness。15-5The alloy is martensite in structure under annealing conditions, and is further strengthened by heat treatment at relatively low temperatures, and the copper-containing phase is precipitated in the alloy。 15-5 is also referred to in some specifications:XM-12。

XM-12Chemical composition：

	Fe	Ni	Cr	Mn	Cu	Si	Cb+Ta	C	P	S
Min	Bal	3.5	14	–	2.5	–	0.15	–	–	–
Max		5.5	15.5	1	4.5	1	0.45	0.07	0.04	0.03

XM-12Physical properties：

Density	Poisson’s ratio	Resistivity
0.280 lb/in3	0.272	589 Ohm-circ mil/ft

XM-12Mechanical properties：

Condition	H900	H1075	H1150
0.2 offset yield strength, ksi	170	125	105
Ultimate tensile strength, ksi	190	145	135
Elongation 2″, %	10	13	16
Reduced Area, %	335	45	50
Hardness, Brinell	388	331	227

XM-12Stainless steel characteristics：

Precipitation hardening

Strength

Medium corrosion resistance to 600°F

XM-12Uses of stainless steel：

Aerospace applications

Chemical and petrochemical applications

Pulp and food processing

Relevant standards：

ASTM: A 564, A 693, A 705 AMS: 5659, 5862J Type 2, STD 2154 ASME: SA-564, SA-693, SA-705

OTHER: BAC 5439 Rev H Class A Type 1, BMS 7-240G Type 1, BSS7055 Rev A