High quality Alloy Steel 1.7225/Scm440 /SAE4140
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:
Round Bar diameter 14-460mm.All the sizes as require can be customerized as fresh production with MOQ.
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.
About products:
High quality Alloy Steel 1.7225/Scm440 /SAE4140
About Us
Guangzhou ChangFeng Steel Co., Ltd, is located in Guangzhou city, it was established in 2012, and is an Professional import and export company with ten years experience of selling special steel, which mainly sells plastic die steel, hot work die steel, cold work mould steel, alloy structural steel, bearing steel, tool steel, stainless steel, carbon steel, etc.
We also act on behalf of exporting steels of mainly steel factories in China, including Baogang group, Shagang group, Wenfeng group, Xingcheng group, Dongte group, Daye and so on. We are full of export experience to the market all over the word, such as America, Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia, Vietnam, Taiwan, and Middle-East.
At the same time, We offer the seamless steel pipe, welded carbon steel pipe, GI pipe, and special pipe. Fittings elbow, tee, reducer, cap, lap joint, flanges etc...This is better for our customer to buy the different products from China, while they are saving their time, but they can enjoy in our best serves.
FAQ
Q: Are you a manufacturer or merely a trader?
A: We are trading company act as exporting Steel Products with our own factory,
we can manufacture the products as in cutomer's requirement,wholesale and retail all kinds of domestic mould steel,the price we offered is very competitive compared with other agents.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as SGS, CE,ISO if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival. Third,the products we export are mainly from ShaGang group, WenFeng group, XingCheng group, DongTe group,DaYe and so on, the quality are certained.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.
Audited Supplier 
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