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SHANGHAI UNITE STEEL |
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ASTM 4130/SCM430/ SCM2/DIN 1.7220 Hot Rolled Steel Bar ,Heat Treatment Steel Bar
1. Standards: AISI 4130,ASTM 4130 ,JIS: SCM430,JIS: SCM2,DIN: 1.7220, 30CrMo
2. Specification: Dia: 10~200mm Length:2000-13000mm or as required
3. Process: EAF(BOF)+LF+VD+ Hot Rolled+ Heat Treatment (optional)
4.Type: Cr-Mo Steel usually used in the hardened, quenched and tempered condition.
| Nominal Composition (GB 30CrMo) | |
|---|---|
| Element | Weight % |
| Carbon | 0.26-0.34 |
| Silicon | 0.17-0.37 |
| Manganese | 0.40 - 0.70 |
| Phosphorus | 0.025 max * |
| Sulphur | 0.025 max * |
| Molybdenum | 0.15 - 0.25 |
| Chromium | 0.80 - 1.10 |
5.Mechanical Properties:
| Property | Values |
|---|---|
| Tensile Strength | >=885 Mpa |
| Yield Strength | >=685Mpa |
| Elongation | >=12 % |
| Reduction of Area | 50 % |
| Charpy Impact Toughness | 42 mean/ 33 min J at -18o C |
| Hardness (HBS) | <=197 |
6.Applications:
Grade 4130 is typically used for pressure containing applications such as valve bodies or pipework, also used for valve gates and stems.
Very good weldability, and so may be readily welded to itself or weld inlayed. However there have been recent concerns on using the grade for buttered connections.
The grade has a typical ruling section of around 4 inches (at 75 Ksi) depending on the composition and analysis, and it is critical that the hardenability of the grade must be taken into account when designing and selecting it for specific equipment.
