SAE4140 1.7225 SCM440 Dia 16-800mm Alloy Mechanical Steel Bar

• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB
• Composition: Alloy Steel
• Technique: Hot Rolled
• Shape: Bar
• Surface Treatment: Black Surface
• Model NO.: SAE4140 42CRMO 1.7225 SCM440
• Special Use: Wear Resistant Steel
• Application: Tool Steel Bar
• Heat Treatment: Annealing/Q+T
• Certificate: ISO/Mill Certificate
• Test: SGS/Ut100%/Elements Testing
• Payment: 30% Deposit, Blance by L/C at Sight or T/T
• Delivery Quantity: Include MOQ
• Technology: Hot Rolled/Forged
• Transport Package: for Customers′ Request
• Specification: diameter 16-450mm
• Trademark: CF STEEL
• Origin: Guangdong, China
• HS Code: 7228300000
• Production Capacity: 1000t/Month

Product Description

SAE4140 1.7225 SCM440 Dia 16-800mm Alloy Mechanical Steel Bar 

Perform Standard: GB/T 3077-1999
 

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,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)

4,Ready Stock: 

Grade	Size(mm)
SCM440 Plate	Thickness	Width	Length
	20-280	2200	5800
SCM440 Round Bar	Diameter		Length
	16-450		3000-6000

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

6, Delivery time
For abundant stock, 15-20 days.For customized products, 30-50 days.
We have full set of equipement (sawing machine/grinding/polishing machine) to make customer's specification.

Listed specifications are only typical grades; products of required specifications can be developed/produced per international, Chinese or industry standards, or based on agreements with customers.

7, Product photos