Product Details
High Tensile Hot Rolled SAE4140 / SCM440 / 1.7225 Mold Steel Plate
SAE4140 mold steel plate is an alloy structural steel, it has good
machinability, processing deformation is small, 4140 alloy
structural steel fatigue resistance is quite good, is a medium
hardenability steel.
After heat treatment, it has good strength and good mechanical
properties, good workmanship, high yield.
The maximum temperature is 427 degrees Celsius.
Equivalent grades
GB(China) | DIN(German) | AISI(USA) | JIS(Japan) |
42CrMo | 1.7225 | SAE4140 | SCM440 |
Chemical Composition(%)
C | Si | Mn | Cr | P | S | Mo |
0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | ≤0.035 | ≤0.035 | 0.15-0.25 |
Feature
1. High strength
2. High hardenability
3. Good toughness,
4. Small deformation during quenching,
5. High creep strength and long-lasting strength at high
temperatures.
Applications
Used in the manufacture of high strength, large cross-section
forgings such as supercharger transmission gear,rear axle, hummar
shank etc.
Recommend heat treatment
Quenching | Tempering |
Heating temperature/℃ | Cooling way | Hardness (HRC) | Tempering temperature /ºC | Cooling way | Hardness (HRC) |
850-880 | Oil Cooling | ≥53 | 450-650 | Air cooling | 25-40 |
Available size(mm)
Flat Bar Size(mm) | Round bar Size(mm) |
Thickness | Width | Length | Diameter | Length |
10-200 | 155-2200 | 2000-6000 | 20-200 | 3000-6000 |
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.
Our Advantages
- We are a stockist who have a lot of stocks all the time, we can
arrange fast shipment
- All products 100% pass UT test before the shipment.
- The 3rd party inspection is accept.
- Low MOQ request
- TT, LC payment are both accepted
- High quality, you won’t have any quality problems
We are here waiting for a cooperation chance between us, contact us
today then you will get one more chance to find a loyal Hot Rolled
Alloy Steel supplier!
More photos for Mold Steel Plate


Company Profile
Guangzhou Changfeng Steel Co., LTD
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.