Hot Rolled 1.7225 SCM440 SAE4140 42CrMo4 Steel Round Bar
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 |
Available Size (mm)
| Grade |
Size(mm) |
| SCM440 Plate |
Thickness |
Width |
Length |
| 20-280 |
2200 |
5800 |
| SCM440 Round Bar |
Diameter |
Length |
| 16-450 |
3000-6000 |
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, 7-15 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.
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Strict Quality Control
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Company Profile
Guangzhou Changfeng Steel Co.,LTD is an export agent company of Baosteel Group special steel products, which mainly sells plastic die steel, hot work die steel, cold work die steel, alloy structural steel, bearing steel, tool steel, stainless teel, carbon steel, etc. We also act on behalf of exporting steels of mainly steel factories in China, including Shagang group, Wenfeng group, Xingcheng group, Dongte group, Daye and so on. Changfeng is full of export experience to the market all over the world, such as America, Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia, Vietnam, Taiwan, and Middle-East.
Changfeng has a lot of experienced and competent elites and is capable of offering the best service after years of development. 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. Our all 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.
Changfeng keeps the principle of " sincerely cooperation, endless striving for perfection" to establish long-term and win-win relationship with importers all over the world.
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