Product Details

Product Description

SCM440 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components, like axles, shafts, bolts, gears and other applications. Similar to alloy grade SCM435 chrome moly alloy steel but with a slightly higher carbon content. The higher carbon content of SCM440 steel gives greater strength and heat treatment capabilities in comparison to SCM435 alloy steels, however it does have inferior weldability characteristics.

1. Supply Range for alloy SCM440 steel bar

SCM440 Steel Round Bar: diameter 8mm-3000mm

2. Common SCM440 Steel Specifications

Country	USA	German	British	Japan	China	Australia
Standard	ASTM A29	DIN 17200	BS 970	JIS G4105	GB/T 3077	AS 1444
Grades	4140	1.7225/ 42crmo4	42CrMo4	SCM440	42CrMo	4140

3. SCM440 Steel Bar Chemical Composition

Standard	Grade	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A29	4140	0.38-0.43	0.75-1.00	0.035	0.040	0.15-0.35	–	0.8-1.10	0.15-0.25
EN 10250	42CrMo4/ 1.7224	0.38-0.45	0.6-0.9	0.035	0.035	0.4	–	0.9-1.2	0.15-0.30
JIS G4105	SCM440	0.38-0.43	0.60-0.85	0.03	0.03	0.15-0.35	–	0.9-1.2	0.15-0.30

4. Mechanical Properties of Alloy SCM440 Steel Bar

Properties	Metric	Imperial
Tensile strength	655 MPa	95000 psi
Yield strength	415 MPa	60200 psi
Bulk modulus (typical for steel)	140 GPa	20300 ksi
Shear modulus (typical for steel)	80 GPa	11600 ksi
Elastic modulus	190-210 GPa	27557-30458 ksi
Poisson’s ratio	0.27-0.30	0.27-0.30
Elongation at break (in 50 mm)	25.70%	25.70%
Hardness, Brinell	197	197
Hardness, Knoop (converted from Brinell hardness)	219	219
Hardness, Rockwell B (converted from Brinell hardness)	92	92
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only)	13	13
Hardness, Vickers (converted from Brinell hardness)	207	207
Machinability (based on AISI 1212 as 100 machinability)	65	65

Picture

Hot rolled scm440 alloy steel round bar

Packaging & Shipping

HOT ROLLED STEEL ROUND BARS

COLD DRAWN ALLOY STEEL ROUND BARS

Company Information

PRODUCTS MENU:

Honed Tube : JIS STKM13C, DIN ST52, SAE1020 ,DIN CK45 etc.
Alloy Seamless Tube: ASME SA-335 (P5, P9, P11, P22 P91) A213 -T22/T12 etc.
Hollow seamless bar :AISI 4130 ,ASTM 4140 etc.
Carbon steel pipe :ASTM A106 Gr.B
Stainless steel pipe : 304, 316, 316L & H grades etc.
Hollow section :S235JR, S275JR, S355JR, P265GH, P355N

SERVICES MENU:

Machining:Turning , Threading , Milling , Boring , Grooving , Skiving , Trepanning , Sawing , Straightening , honing etc

Jay Hou

LIAOCHENG KUNCHENG PIPE CO.,LTD

Room A2709 ChuangYe Building,Liaocheng City, Shandong Province, China

Mobile&Whatsapp:+8613184174934(Wechat)

Tel&Fax:0086-0635-2930669

Skype:mrhrc

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