The high quality China GBT K438 material is one of the more steel grades we supply, Age hardening type Nickel base alloy. K438 is our main production grade, which has been approved by customers in many countries since its initial production, including our K438 round bars, flat bar, forgings, fasteners, tubes, wires, strips, sheets & Plates, as well as a variety of profiles, professional high precision auto-lathe processing manufacturer of clinching fasteners, axes, standoffs, screws, studs, nuts, bolt, OEM parts and special shaped turning partsthe state of delivery includes quenched and tempered, annealed, machined semi-finished products, we also have strict management of the packaging, to avoid material damage from transportation. We are the best supplier of K438 materials, and we are willing to develop together with customers from all over the world.
Also includes K438 steel material norm, chemical composition, mechanical properties, datasheet, K438 equivalent, heat treatment and temperature process of K438, The peak hardness can be achieved, Contains all of the specification, welding properties, let us in K438 this steel grade have a more comprehensive understanding, Download the full K438 PDF version of this datasheet.
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | Mo(％) | W(%) |
|---|---|---|---|---|---|---|---|---|
| 0.10-0.20 | Max 0.5 | Max 0.5 | Max 0.015 | Max 0.01 | 15.5-16.5 | Balance | 1.50-2.00 | 2.40-2.80 |
| Co(%) | B(%) | Nb(%) | Al(%) | Ti(%) | Ta(%) | Other(%) | ||
| 8.00-9.00 | 0.005-0.015 | 0.50-1.10 | 3.20-3.70 | 3.00-3.50 | 1.50-2.00 | Zr:0.05-0.15 |
| Rp0.2 (MPa) | Rm (MPa) | Impact KV (J) |
Elongation A (%) |
A Z (%) | Delivery | Hardness HB |
|---|---|---|---|---|---|---|
| 884 (≥) | 641 (≥) | 34 | 23 | 44 | Solution & Aging, Ann, Ausaging, Q+T | 241 |