Guangzhou Changfeng Steel Co., LTD
The Customer Satisfaction Is The Soul Of Enterprise.
Add to Cart
SAE4140 / SCM440 / 1.7225 / 42CrMo Black Surface Alloy Steel Round Bar
Specification
4140 / 440 / 1.7225 / 42CrMo steel is an ultra-high strength steel with high strength and toughness, good hardenability, no obvious temper brittleness, high fatigue limit and multiple impact resistance after quenching and tempering, and good low temperature impact toughness.
1. Grades
| Chinese | American | German | Japanese |
| GB | AISI | DIN | JIS |
| 42CrMo | SAE4140 | 1.7225 | SCM440 |
2. Chemical Analysis
| Grades | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 4140 | 0.38-0.45 | 0.17-0.37 | 0.5-0.80 | ≤0.035 | ≤0.035 | 0.9-1.2 | 0.15-0.25 | ≤0.3 | ≤0.035 |
| 42CrMo | 0.38-0.45 | 0.17-0.35 | 0.5-0.80 | ≤0.035 | ≤0.035 | 0.9-1.2 | 0.15-0.25 | ≤0.03 | ≤0.030 |
| 440 | 0.38-0.43 | 0.15-0.35 | 0.6-0.85 | ≤0.030 | ≤0.030 | 0.9-1.2 | 0.15-0.30 | ≤0.3 | ≤0.250 |
3.Delivery Condition
Black surface, hot rolled, pre-hardened/annealing/Q+T, 26-30HRC
4. Available Dimensions
| Plate | Thickness | 20-120mm |
| Width | 2200mm | |
| Length | 4000-10000mm | |
| Round Bar | Diameter | 16-450mm |
| Length | 4000-10000mm |
5. Heat Treatment
| Quenching | Tempering | ||||
| Heating Temperature/℃ | Cooling | Hardness/HRC | Heating Temperature/℃ | Cooling | Hardness/HRC |
| 820-840 | Oil | ≥53 | 450-650 | Air | 25-40 |
6. Characteristics
1) Belong to the ultra-high strength steel
2) High strength and toughness
3) Good hardenability
7. Application
1) Suitable for manufacturing requirment a certain strength and toughness of large and medium-sized plastic mold, such as locomotive traction with the big gear, the supercharger drive gear, pressure vessle, rear axle, gear load connecting rod and a spring clip
2) Used to under 2000m deep well of oil drill pipe joint and the fishing tool
3) Used for bending machine mould
Picture Display
Main Products
Packing
Nude packing or as customers' request.
Shipment
For abundant stock, 15-20 days.
For customized products, 30-50 days.
About Us
Guangzhou ChangFeng Steel Co., Ltd. is a professional supplier of TOOLING/MOULD STEEL, which have specialized in this line since 2005 in China. 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.
Our company keeps the principle of “sincerely cooperation, endless striving for perfection”. We desire to establish the long-term mutual beneficial and win-win relationship with clients all over the world.
Certificate
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 cutomers' 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: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material don't have stock, the delivery lead time is about 30-50 days after receiving your prepayment or firm order.
Q: What is the payment term?
A: 100% T/T or 30%T/T deposite prepaid, 70%Balance L/C
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.