Alloy Coil 42crmo4
alloy coil 42crmo4
Product Description
General Information:
Chromium molybdenum high tensile steel with yield strength of 550N/mm2.
Chromium renders steel oil hardenable and increase hardenability.
Weldability suffers with increasing chromium content.
High temperature strength and high pressure hydrogenation properties are promoted by chromium and molybdenum.
Molybdenum significantly reduces temper brittleness.
Delivery condition: Hot rolled or forged, Peeled or black surface, annealed or QT.
Comparable Standards:
| AISI/SAE | DIN | W.Nr. | AFNOR | JIS | BS | SIAU | GB,YB |
| 4140 | 42CrMo4 | 1.7225 | 42CD4 | SCM440 | 708A42 | UM8 | 42CrM. |
Chemical Analysis (%):
| C | Mn | Si | Cr | Ni | Mo | P | S |
| 0.38-0.45 | 0.60-0.90 | 0.15-0.40 | - | 0.90-1.20 | - | - | - |
Hot work and Heat treatment temperatures:
| Forging | Normalization | Subcritical annealing | Isothermal annealing | Hardening | Tempering |
| 1100~900 | 860~880 | 680~720 | 830~900 670x3h |
830~860 oil | 550~650 |
Machanical Properties:
| Tensile str. (N/mm2) | Yield point (N/mm2) | Elongation (%) | Contraction (%) | Impack work (J/cm2) | Hardness (HB) |
| 1080 | 930 | 12 | 45 | 63 |
217
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Production Workshop
Packing & Delivery
QUALITY CONTROL SYSTEM
ORIGINAL & THIRD PARTY TEST CERTIFICATE
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