Certified Company
DNV&ABSCertified Company
ISO 9001:2008R&D Production
In China
K438
K438 material is Age hardening type Nickel base alloy.
Chemical composition of K438, K438 mechanical properties, K438 datasheet, K438 equivalent grade, Heat treatment and temperature process of K438.
K438 property sheet
Chemical Composition of K438
| C | 0.10-0.20 |
| Si | Max 0.5 |
| Mn | Max 0.5 |
| P | Max 0.015 |
| S | Max 0.01 |
| Cr | 15.5-16.5 |
| Ni | Balance |
| Mo | 1.50-2.00 |
| W | 2.40-2.80 |
| Co | 8.00-9.00 |
| B | 0.005-0.015 |
| Nb | 0.50-1.10 |
| Al | 3.20-3.70 |
| Ti | 3.00-3.50 |
| Ta | 1.50-2.00 |
| other | Zr:0.05-0.15 |
Mechanical Properties of K438
| Rp0.2 (MPa) | 921 (≥) |
| Rm (MPa) | 941 (≥) |
| AKV (J) | 41 |
| A (%) | 23 |
| Z (%) | 42 |
| Hardness | HBW 432 |
K438 shape and dimensions
| K438 Round bar: | 1mm-800mm |
| K438 Square bar: | 10mm * 10mm-600mm *600mm |
| K438 Flat bar: | Thickness:8mm-800mm Width:10mm to 1500mm |
| K438 Sheet or Plate: | Thickness:3mm-80mm Width:1.5mm to 1500mm |
| K438 Strip or Coil: | Thickness:0.1mm-3mm Width:1.5mm-1500mm |
| K438 Forgings: | Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes |
©Longhai Special Steel 2025
