ASTM A437 Grade B4C Turbine Bolting Alloy steel
| Product parameters | |
| Material Category:: | Martensitic Stainless Steel Series |
| Material Technical Standards:: | ASTM A437 / 437M |
| Terms of Price:: | Ex works, CIF, CFR |
| Min. order quantity Per Batch:: | 100 KG |
| Mode of transportation:: | Sea shipment, Air cargo or international courier |
| Surface Condition:: | Rough turned, shot blasted, centre ground |
| Ultrasonic Test Standard:: | ASTM E2375 / MIL-STD- AMS 2154 / SEP 1923 / GB/T 4162 / EN 10228-3 / EN 10308 |
| Production Lead Time:: | Within 5 days after 30% deposit prepayable |
| Unified Social Credit Code:: | 91510871777942750J |
| Company ISO Register No:: | UQ211218R0 |
Description
Description:
ASTM A437 Grade B4B is a hardenable stainless steel designed for use at temperatures of up to 1200F. X20CrMoWV12-1 has good resistance to scaling and oxidation. Through heat treatment, high mechanical properties can be developed. X20CrMoWV12-1 is used in applications such as compressors or steam turbines and also in aircraft parts, valves, high temperature bolting, and other mechanical parts used in high temperature circumstances.
Chemical Composition (Mass weight - %)
| C | Si | Mn | P | S | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|---|
| 0.20 ～ 0.25 | 0.20 ~ 0.50 | 0.50 ～ 1.00 | ≤ 0.025 | ≤ 0.025 | 11.0 ～ 12.5 | 0.50 ～ 1.00 | 0.90 ～ 1.25 | W 0.90 ～ 1.25 V 0.20 ～ 0.30 |
Mechanical Properties Under Room Temp.
| Condition of heat treatment | Tensile Rm(MPa) | Yield Rp0.2(MPa) | Elongation A (%) |
Reduction in cross section on fracture Z (%) |
Impact AKV/AKU(J) | Brinell Hardness(HBW) |
|---|---|---|---|---|---|---|
| annealed | - | - | - | - | - | ≤ 248 |
| Hardened 1022℃ ~ 1050℃ air or oil cooled, ≥620℃ X 2H, tempered | ≥ 965 | ≥ 760 | ≥ 13.0 | ≥ 30.0 | ≥ 11 | 302 ~ 352 |
| Hardened 1022℃ ~ 1050℃ air or oil cooled, ≥677℃ X 2H, tempered | ≥ 825 | ≥ 585 | ≥ 17.0 | ≥ 35.0 | ≥ 20 | 241 ~ 285 |
