Ads by Google
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:
Testing:
Test Equipments:
Sawing machine:
Max sawing size: 800mm*6000mm
Office:
Factory:
Rolling:
Our own certifications:
(1.7225, SCM440, 42CrMo4) 4140 steel plate