AISI 1010 / S10c Carbon Steel Tube – Mechanical Tubing – Seamless Steel Pipe
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27SiMn seamless cold drawn steel tube, with black annealed out surface
4145H Modified Alloy Steel Round Bar, Hot Rolled Steel Bar
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Categories：Steel Bars
Model No.:SCM440
Size: 10-600mm.
Length: as your request.
Surface: black/peeled/turbed/grinding...
Delivery condition: cold drawn/annealed/quenched&tempered..
Comparison of Materials
EU | INTER | USA | JAPAN | GERMANY | CHINA |
EN | ISO | AISI | JIS | DIN | GB |
42CrMo4 | 42CrMo4 | 4140 | SCM440 | 42CrMo4 | 42CrMo |
Chemical Composition(JIS G4051)
C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Mo(%) | Ni(%) | Cu(%) |
0.38-0.43 | 0.15-0.35 | 0.6-0.85 | 0≦0.03 | 0≦0.03 | 0.9-1.2 | 0.15-0.3 | 0≦0.25 | 0≦0.3 |
SCM440 is medium carbon chromium molybdenum alloy steel, which is an alloy steel containing chromium and molybdenum. It has the advantages of stable composition, low harmful elements, high steel purity, small decarburization layer and few surface defects. It is easy to be spheroidized and has low cold cracking rate. It is usually hardened and tempered. The ultimate tensile strength is 850-1000 Mpa. This material achieves a very good balance between strength, toughness and wear resistance. The chromium content of the alloy provides good hardness permeability, and the molybdenum element imparts average hardness and high strength.
SCM440 reacts well in heat treatment and it is easy to process under heat treatment conditions. This material provides many desirable properties such as good strength and wear resistance, excellent toughness, good ductility and resistance to high-temperature stresses.
1. High strength and toughness.
2. Great property of quenching and can be deep hardened.
3. Less tempering brittleness tendency.
4. Great machining performance under high temperature and nice appearance after machining.
5. Good performance in weld ability.
6. Excellent performance in impact absorption, such as where the hammer may bounce back and has barely any damage caused upon impact.
Annealing: 830℃ Furnace Cooling
Normalization: 830~880℃ Air Cooling
Hardening: 830~880℃ Oil Cooling
Tempering: 530~630℃ Rapid Cooling
Criterion for heat treating conditions revise:
Ac: 750~790℃
Ar: 740~690℃
Ms: 310℃
Tensile strength (kgf/mm²): ≧100
Yield strength (kgf/mm²): ≧85
Elongation (%): ≧12
Cross section reduction rate (%): ≧45
Impact value (J/cm2): ≧6
Hardness (Hb) : 285~352
1 Hot rolling process
2 Hot Forging: Electro-hydraulic; High-speed-hydraulic; Oil-hydraulic; Precision-forging
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
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