What is the composition of 1.4542 material?

What is 1.4542 material grade?

630 (1.4542) Stainless Steel. 630 stainless steel is one of the newest stainless steel grade found in 1960s. This grade is written as 1.4542 or X5CrNiCuNb16-4 or 17-4 PH according to EN norm and it is written as UNS S17400 according to UNS norm.

 

17-4PH Material Equivalent Grades

AISI 630	ASTM A693 (630)	AMS 5342	MIL-S-81506
AMS 5604	ASTM A705 (630)	AMS 5343	SAE J467 (17-4PH)
AMS 5622	MIL C-24111	AMS 5344	ASME SA705
AMS 5643	MIL P-47183	AMS 5355	ASME SA564
ASTM A564 (630)	MIL S-81591	AMS 5825

 

What is the composition of 1.4542 material?

Weight %	C	Mn	P	S	Si	Cr	Ni	Mo	Cu	Nb+Ta
Min.						15,0	3,50		3,00	0,15
Max.	0,070	1,00	0,040	0,030	0,70	17,5	5,00	0,60	5,00	0,45

 

Mechanical Properties (Specific for Bars – Condition H1150D)

Condition
	17-4PH Annealed	17-4PH (H900)	17-4PH (H925)	17-4PH (H1025)	17-4PH (H1075)	17-4PH (H1100)	17-4PH (H1150)	17-4PH (H1150+ H1150, Double Aged)	17-4PH (H1150M)
Tensile Strength N/mm2	1034	1380	1310	1170	1140	1035	1000	965	860
0.2% YS N/mm2	760	1275	1200	1140	1035	930	860	760	585
Reduction of Area %	30-60	50	54	56	58	58	60	60	68
Elongation %	6-15	14	14	15	16	17	19	20	22
Charpy Impact J		20	34	47	54	61	68	108	135

 

Solution Treatments for UNS S17400 Stainless Steel

Condition	Hardening	Hardening	Type of Cooling	Hardness
	Temperature	Time		Brinell	Rockwell C
17-4PH Annealed	1038C	1/2	Oil/Air (to below 32℃)	363 max.	39 max.
17-4PHH900	480℃	1	Air	420	44
17-4PHH925	594C	4	Air	409	42
17-4PHH1025	55℃	4	Air	352	38
17-4PHH1075	85C	4	Air	341	36
17-4PHH1100	595℃	4	Air	332	35
17-4PHH1150	621℃	4	Air	311	33
17-4PH (H1150+H1150, Double Aged H1150)	760℃ 760℃	4 followed by 4	Air Air	302	33
17-4PH(H1150-M)	760℃ 620℃	2 followed by 4	Air Air	277	27

 

Heat Treatment

Solution annealed at 1040°C. Double hardened/ aged at 620°C (1150°F).

Weldability

Good, Pre-heating and post-heating practices used for standard hardenable stainless grades are not required.

 

Heat-Treating Flexibility:

Through various heat treatments (e.g., H900, H1025, H1150), its strength and toughness can be significantly adjusted to suit diverse application requirements.

Gnee specializes in the production and manufacture of 17-4PH stainless steel in various shapes, including plates, bars, tubes, wires and forgings, which are widely used in aerospace, chemical, oil and gas and other industries. We support cold working, hot working, welding, return processing and other process treatments, and supply a rich variety of martensitic stainless steel grades.Email: sales@gneestainless.com