DIN1.7225 / SAE4140 / GB42CrMo, JIS SCM440, Alloy Steel Round Plate

Brand Name	ChangGang,TaiGang,BaoGang,Fushui,Baogang steel		Place of Origin	China
Model Number	DIN1.7225/SAE4140/GB42CrMo,JIS SCM440

Delivery Time:7~15 days in stock
Certification:ISO9001;2008;SGS TEST;Mill certificate test

DIN1.7225 / SAE4140 / GB42CrMo, JIS SCM440, Alloy Steel Round Plate

Description:

1.DIN1.7225/SAE4140/GB42CrMo,JIS?SCM440?alloy?steel?plate

2.Hot?rolled?or?forged?condition,?annealing?or?harden,?black?or?milled?surface

3.Pre-heat?treatment:

Annealing?:?heat?to?840-860°c,?keep?2H,?furnace?cold,?hardness≤217HBS High?temperature?tempering?:?heat?to?680-700°c,?air?cold,?hardness?≤217HBS

4.Heat?treatment:?

?Normalization:?heating?to?840?to?880?°?C,?maintenance,?furnace?cooling?to?600?°?C,?then?in?air.? ?Stress?relieving:?after?rough?heat?to?500?°?C,?maintenance?raff.?In?oven?to?400?°?C,?then?in?air. ?Hardening:?preheating?from?600?to?650?°?C?austenitizing at?840?to?880?°?C,?quenching?in?oil.? Tempering:?heating?to?550?-?650?°?C?and?maintenance?regime,?again?depending?on?the?mechanical? properties?

5.?Hot?rolled?technology:EAF+LF+VD

?? Forged?technology:?EAF+LF+VD+ESR+Forging?+Q?T?+?Machined?surface?

6.Ultrasonic?test?standard:?SPE1921-GR3,?CLASS?C/C?or?D/D

7.Production?leadtime:?7~10?days

8.?Chemical?composition:

C	Mn	Si	Cr	Ni	Cu	P	S
0.17-0.23	0.30-0.60	0.15-0.40	1.25-1.75	3.25-3.75	≤0.25	≤0.030	≤0.030

9.Compared?grades(based?on?usage):

Chinese	American	German	Japanese
GB	AISI	DIN	JIS
42CrMO4	4140	1.7225	?SCM440

Applications:?

General?service?industries?(petroleum,?food,?chemical,?paper,?fertilizer,??Fabric,?aviation?and?nuclear) Fluid,?gas?and?oil?transport Pressure?and?heat?transmission Construction?and?ornament Boiler?heat?exchangers

Specifications:

Hot?rolled?condition	Steel?plate(mm)	Mill?name
	Diameter	Length
	￠16~￠255	2000~5800	Dongbei,XiNing,?BengGang,?ShouGang?steel?
Forged?condition?	￠150~￠600	2500~4000	Local?mill?with?6000tons?fluid?forged?machine

Competitive?Advantage:

Good?purity?and?homogeneity. Good?machinability(Roughing,?grinding?and?drilling). Good?dimensional?stability?during?heat?treatment. Excellent?preparation?for?nitriding,?both?ionic?and?gaseous,?induction?hardening?to?increase?the ?mechanical?properties. Competitive?price Fast?production?leadtime All?the?material?are?inspected?with?3?times?to?meet?the?highly?standards