Model NO.: SAE4140, 42CRMO, 1.7225, SCM440
Standard: AISI, ASTM, DIN, JIS, GB, BS
Technique: Hot Rolled
Surface Treatment: Polished
Application: Tool Steel Bar
Technology: Hot Rolled/Forged/Clod Drawn
Test: SGS/Ut100%/Elements Testing
Delivery Quantity: Include MOQ
Transport Package: for Customers′ Request
Origin: Guangdong, China
Type: Alloy Steel Bar
Composition: alloy steel
Special Use: Free Cutting Steel
Heat Treatment: Annealing/Q+T
Certificate: ISO/Mill Certificate
Payment: L/C or T/T
Specification: diameter 14-460mm
HS Code: 7228300000
High quality Alloy Steel 1.7225/Scm440 Steel Bar/SAE4140
Perform Standard: GB/T 3077-1999
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.
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;
Tensile strength:σb (MPa):≥1080(110)
Yield strength:σs (MPa):≥930(95)
Section shrinkage:ψ (%):≥45
Impact work:Akv (J):≥63
Impact toughness value:αkv (J/cm2):≥78(8)
Round Bar diameter 14-460mm.All the sizes as require can be customerized as fresh production with MOQ.
Hot rolled, Heat Treatment,black, hardness or tempered hardness:28-34 HRC.
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.
Hubei Kaixin Supply Chain Management Co., Ltd.
TEL ：+8618272169977 ; 0714-6510168
Add：No.37 Huahu Ave Huahu Street.Huangshi City Hubei