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Heat Treatment: | Annealed / Q+T | Test: | SGS /UT 100% / Element Testing |
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Shape: | Plate / Block | Standard: | AISI, ASTM, DIN, GB,JIS,BS |
Delivery Condition: | Forged Or Hot Rolled | Service: | Sample Free And 24 Hours Online |
High Light: | 34 HRC Hot Rolled Alloy Steel,1.7225 Hot Rolled Alloy,SCM440 Alloy Steel Plate |
Annealed Steel Plate of SCM440, 1.7225, 4140 For Hot Rolled Alloy Steel
Perform Standard: GB/T 3077-1999
Equivalent grades:
GB(China) | DIN(German) | AISI(USA) | JIS(Japan) |
42CrMo | 1.7225 | SAE4140 | SCM440 |
Chemical Composition(%)
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, Recommend heat treatment:
Quenching | Tempering | ||||
Heating temperature/ºC | Cooling way | Hardness (HRC) | Tempering temperature/ºC | Cooling way | Hardness (HRC) |
850-880 | |||||
Oil Cooling | 50-52 | 450-650 | Air | 25-40 |
4,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)
5,Ready Stock:
Grade | Size(mm) | ||
SCM440 Plate | Thickness | Width | Length |
12-280 | 2200 | 5800 | |
SCM440 Round Bar | Diameter | Length | |
16-450 | 3000-6000 |
6,Delivery state:
Hot rolled, Heat Treatment,black, hardness or tempered hardness:28-34 HRC.
Annealing:HBS<=235.
7, 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.
8,Our service:
Contact Person: Echo
Tel: +86 18148729336