SAE4140, 1.7225, SCM440 Hot Rolled Steel Plate of Special Tool
Steel
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 14-450mm.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.
7,Available size(mm)
| Grade | Size(mm) |
| SCM440 Plate | Thickness | Width | Length |
| 20-280 | 2200 | 5800 |
| SCM440 Round Bar | Diameter | Length |
| 16-450 | 3000-6000 |
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.
Our advantages
Competitive price.
Full of export experience.
Quick delivery:The company promise to provide a just-in-time
delivery
QC :100% inspection.
Our Services
1. We are the professional supplier of special mould steel.
2. Stock always kept for small scale emergency demand.
3. Small or big order can be delivered on time per customer's
requirement.
Product Show
Strict Quality Control
About us
Guangzhou ChangFeng Steel Co., Ltd. is a professional special steel
company, which specialized in exporting mould steel products based
in China. With more than 20 years experience in special steel
industry, our main products are Plastic Mould Steel, Hot Work Mould
Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel,
Stainless Steel, Carbon Steel and Forged Block.
To ensure provide high quality products to customers, we have close
cooperation with many Chinese first class special steel
enterprises, including Baosteel Group, Dongbei Special Steel,
Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng
Special Steel, Daye Special Steel.
We have thousand tons of stock materials in our own factory and
also can provide processing services to customers. We are full of
export experience for many years, the product covers America,
Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia,
Vietnam, Taiwan, and Middle-East.
After years of development, the company has established a complete
quality management and export service system. We have a group of
experienced and competent elites and is capable of offering the
best service to clients.
Our company equips with large-sized Vertical saw machines,
Horizontal saw machines, Milling machines, Grinding machines and
other advanced equipments to provide customers with cutting and
other processing services.
All the products should be inspected the metallographic analysis,
hardness, ultrasonic flaw detection and other strict inspection
processes, which meet the standards of DIN, AISI, JIS and GB to
ensure their function and quality.
