| Type: | Alloy Steel Bar |
|---|---|
| Standard: | ASTM |
| Technique: | Hot Rolled |
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42CrMo / 4142 SCM440 steel bar stock , hot rolled alloy steel round bar
Specifications
42CrMo / 4140 Steel Round Bar
ISO9001 certified
Flexible MOQ
Prompt delivery stock within 7days
MTC DIN10204 3.1/3.2
Equivalent grades
| GB | DIN | AISI | JIS |
| 42CrMo | 1.7225 | 4140 | SCM440 |
Chemical Composition
| C | Si | Mn | Cr | Mo | P | S |
| 0.38-0.43 | 0.40max | 0.60-0.90 | 0.90-1.20 | 0.15-0.30 | ≤0.035 | ≤0.035 |
Available size
| Round steel bar 60-800mm | |||||||||
| Flat steel bar 25-400mm*200-800mm |
Surface condition
| Black surface/ Grinded/ Machined |
Hardness
| Annealed HBS 217 max |
CharacteristicsApplications
| 42CrMo / 4140 Steel Round Bar is used to producecomponents with high requirements on toughness, e.g. gear wheels, pinions, connecting rods, parts for mechanical engineering . |
Heat treatment
| Forging | Heat to 1150°C. Hold until uniform. Minimum forging temperature 850°C.Cool slowly in ashes or sand etc. | ||||||||
| Annealing | Heat to 830°C-850°C.Cool in furnace. | ||||||||
| Normalising | Heat to 870°C-900°C.Cool in still air. | ||||||||
| Stress Relieving | Annealed: Heat to 600°C-650°C.Hardened: Heat to 500°C-550°C.Cool in still air. | ||||||||
| Hardening | Heat to 830°C-880°C. Quench in oil or polymer. | ||||||||
| Tempering | Heat to 450°C-700°C cool in still air. NB. Tempering within the range 200°C-420°C will result in temper brittleness and should be avoided. | ||||||||
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