Alloy Structure Steel Round Bar SAE4140/SCM440 For Auto Parts

It is an alloy structural steel, below is the specification of Engineering Steel Bar SAE4140:

High strength, high hardenability, good toughness, small deformation during quenching, high creep strength and long-lasting strength at high temperatures.

For the manufacture of steel with higher strength and quarry section than 35CrMo, such as locomotive traction gear, supercharger transmission gear, rear axle, heavy load connecting rod and spring clamp, can also be used 2000m below the deep oil drill pipe joints and salvage tools.

Equivalent grades

Applications

Used in the manufacture of high strength, large cross-section forgings such as supercharger transmission gear,rear axle, hummar shank etc.

Chemical Composition(%)

Recommend heat treatment

Available size(mm)

Feature

1. Good strength, hardenability and toughness.

2. High creep strength and long lasting strength under the high temperature.

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)

Standards and Practices:

Bars & Forgings – To comply with all requirements of the latest edition of the Standards of the Society of Automotive Engineers for SAE 4140 steel.

Plates – To comply with all requirements of the latest edition of the Steel Products Manual of the Iron and Steel Society of AIME, for 4140 alloy steel plate.

Why Choose Us?

1. Competitive price and high quality
2. Quick delivery and standard exporting package
3. OEM/ODM order accept
4. Flexible payment with T/T, L/C
5. Smooth production ability(1000tons/month)
6. Approved by ISO9001, CE, SGS every year
7. Best service with 24 hours reply

More about Changfeng Steel

Guangzhou Changfeng Steel Co., Ltd is a mould steel stockist, we have our own factory and trading company. Our main steels are carbon tool steel, plastic mold steel, hot work tool steel, cold work tool steel, alloy steel for mechanical, etc.

All material are with high quality and competitive price.

We are here waiting for a cooperation chance between us, contact us and you will have one more loyal mold steel supplier!

Guangzhou ChangFeng Steel Co., Ltd. is a professional special steel company, which specialized in exporting mould steel products based in China.With twenty 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.

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.