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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 | 830~900670x3h | 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 |
Product and Service - category
More photos from Neworigin special steel:
Warehouse in Shenzhen:
Stockings and products:
Our own Independent Labs
Neworigin has it's own labs to do all the tests and analysis of the materials. With full
equipments, the lab also could provide third party inspection services. We offer spectral
chemical analysis, mechanic tests, UT tests and microstructure analysis etc.
Test Equipments:
Sawing machine:
Max sawing size: 800mm*6000mm
Office:
Factory:
Rolling:
Our own certifications:
(1.7225, SCM440, 42CrMo4, 4140 ) 42CrMo4 plate