Description
ApplicationStructural parts of medium and large cross sections and high surface hardness, e.g., valve and gate valves, cylinders for combustion engines, superheated steam valves and fittings.All Grades Comparison
Quality StandardEN 10250 Open steel die forgings for general engineering purposes. Alloy special steelsChemical Composition(%)
| C | Mn | Si | P | S | Cr | Ni | Mo | V |
| 0.26-0.34 | 0.40-0.70 | 0.40 max | 0.035 max | 0.035 max | 2.30-2.70 | 0.60 max | 0.15-0.25 | 0.10-0.20 |
Mechanical Properties(T=20°C if not differently stated)
| Process | Diameter(mm) | Tensile Strength Rm (Mpa) | Yield Strength Rp0.2 (Mpa) | Elongation A5 (%) | Impact Value Kv (J) Room Temperature |
| QUENCHED AND TEMPERED | 160 max | 900 min | 700 min | 12 min | 35 min |
| QUENCHED AND TEMPERED | 160-330 | 800 min | 590 min | 14 min | 35 min |
HEAT TREATMENT:
- Soft Annealing: Heat to 680-720oC, cool slowly. This will produce a maximum Brinell hardness of 248.
- Nitriding:
Gas/plasma nitriding temperature (gas, salt bath): 570-580°C
Gas/plasma nitriding temperature (powder, plasma): 580°C
Surface hardness after nitriding: 800 HVHardening: Harden from a temperature of 850-880°C followed by oil quenching.
· Tempering:Tempering temperature: 570-680°C.Forging:Hot forming temperature: 1050-850°C.Mill′s test certificate:EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
Complaint
