ASTM A437 Grade B4B Round bar On-hand Stock
ASTM A437 Grade B4B, A Martensitic Stainless Steel also known as AISI 422, DIN 1.4935, JIS SUH616, ASTM B4B,,, Equivalent standards are similar to one or more standards provided by the supplier.
| Product parameters | |
| Material category:: | Martensitic Stainless Steel Series |
| Material technical standards:: | ASTM A437 / 437M |
| Stock & Inventory available:: | Diameter 15 ~ 220mm |
| Melting process way:: | EAF + VD + LF / BEF + ESR |
| Min. order quantity:: | 500 kg |
| Mode of transportation:: | Sea shipment, Air cargo or international courier |
| Heat treatment practice:: | Hardened 1030 ℃, water or air cooled, tempered 650 ℃ min, 2 times tempered |
| 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 |
| Unit price:: | Negotiable based on the order size |
| Production lead time:: | Within 5 days after 30% deposit prepayable |
| 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.
Equivalent Grades
| DIN | ASTM | AISI | UNS | JIS | Other |
|---|---|---|---|---|---|
| 1.4935 X20CrMoWV12-1 |
Grade 616 | 422 | S42200 | SUH 616 | 10705BU AMS 5655 |
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 |
