Steel Round Bar SCM440
Characteristics
Very common Quenched & Tempered alloyed engineering steel grade With high intensity, high hardenability. It has a small distortion afer quenching, a ghigh creep strength and lasting intensity afer processing of high tempreature.
Features
It's one kinds of high quality alloy structural steel.
Hot forged steel round bars and Stabilizer, diameter from 120mm to 420mm .
Hot forged steel round bars and Stabilizer, diameter from 120mm to 420mm .
Availability
Round barOuter Diameter: 10mm - 420mm
Length: 1000mm - 9000mm
Chemical composition: ( % )
| Grade | C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| SCM 440 | 0.38-0.42 | 0.15-0.35 | 0.60-0.85 | 0.030 max | 0.035 max | 0.90-1.20 | 0.25 max | 0.25 max | 0.15-0.30 |
| AISI 4140 | 0.38-0.45 | 0.15-0.40 | 0.60-0.90 | 0.035 max | 0.035 max | 0.90-1.20 | 0.030 max | 0.030 max | 0.15-0.30 |
Mechanical Properties
| Properties | SCM440 | |
| Tensile Strength σb (MPa) Min | 1080 | |
| Yield Strength σb (MPa) Min | 930 | |
| Elongation δ5 (%)Min | 12 | |
| Hardness (HB) | as Supplied | |
| Hardening Temp (C) | 820-850 | |
| Impact value Akv (J)Min | 63 | |
| Ouenching Medium | Oil | |
| Supplied Condition | Annealed |
Application
Forging main shaft and flange for wind turbineForging shaft, forging ring and forging tube sheet for power generation(steam turbine, gas compressor)
Forging flange, forging tube sheet and forging pipe for petrochemical equipment(pressure vessel)
Forging shaft, forging connecting rod and forging crankshaft for shipbuilding
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