SCM440 1.7225 4140 Hot rolled Tool Mechanical Special Alloy Steel Plate

• Standard: DIN, JIS, AISI, ASTM, GB, BS
• Technics: Hot Rolled
• Application: Tool Steel Bar
• Surface: Black
• Alloy: Alloy
• Special Use: High-strength Steel Plate, Free Cutting Steel
• Model NO.: SCM440, 1.7225, 4140
• Heat Treatment: Annealing/Q+T
• Technology: Hot Rolled/Forged/Clod Drawn
• Thickness: 12-280mm
• Width: 2200mm
• Certificate: ISO/Mill Certificate
• Test: SGS/Ut100%/Elements Testing
• Delivery Quantity: Include MOQ
• Transport Package: for Customers′ Request
• Specification: thickness: 12-280mm width: >=155mm, length: 5800m
• Trademark: CF STEEL
• Origin: China
• HS Code: 7225401000
• Production Capacity: 1000t/Month

Product Description

SCM440 1.7225 4140 Hot rolled Tool Mechanical Special Alloy Steel Plate

Perform Standard: GB/T 3077-1999

Equivalent grades:

GB(China)	DIN(German)	AISI(USA)	JIS(Japan)
42CrMo	1.7225	SAE4140	SCM440

Chemical Composition(%)

C	Si	Mn	Cr	Mo	P	S	Ni
0.38~0.45	0.17~0.37	0.60~0.90	0.90~1.20	0.15-0.25	≤0.018	≤0.030	≤0.012

1, Application
It used for section large forgings, such as locomotive traction gears, with supercharger drive gear, the rear axle, the connecting rod and the spring load greatly clip,oil drill pipe joints and fishing tools,etc.

2, Feature
1) Weldability suffers with increasing chromium content;
2) High temperature strength and high pressure hydrogenation properties are promoted by chromium and molybdenum;
3) Molybdenum significantly reduces temper brittleness;
4) Chromium renders steel oil hardenable and increase hardenability;
5) Chromium molybdenum high tensile steel with yield strength of 550N/mm2;

3, Recommend heat treatment:

Quenching			Tempering
Heating temperature/ºC	Cooling way	Hardness (HRC)	Tempering temperature/ºC	Cooling way	Hardness (HRC)
850-880
	Oil Cooling	50-52	450-650	Air	25-40

4,Mechanical Properties:
Tensile strength:σb (MPa):≥1080(110) 
Yield strength:σs (MPa):≥930(95)
Elongation:δ5 (%):≥12
Section shrinkage:ψ (%):≥45
Impact work:Akv (J):≥63
Impact toughness value:αkv (J/cm²):≥78(8)

5,Ready Stock: 

Grade	Size(mm)
SCM440 Plate	Thickness	Width	Length
	12-280	2200	5800
SCM440 Round Bar	Diameter		Length
	16-450		3000-6000

 
6,Delivery state:
Hot rolled, Heat Treatment,black, hardness or tempered hardness:28-34 HRC.
Annealing:HBS<=235.

7, Delivery time
For abundant stock, 7-15 days.For customized products, 30-50 days.
We have full set of equipement (sawing machine/grinding/polishing machine) to make customer's specification.

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