UNS R20990
2014-01-06 15:29:12 Print this pageThe high quality USA UNS R20990 material is one of the more steel grades we supply, Chromium metal. R20990 is our main production grade, which has been approved by customers in many countries since its initial production, including our R20990 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 R20990 materials, and we are willing to develop together with customers from all over the world.
Also includes R20990 steel material norm, chemical composition, mechanical properties, datasheet, R20990 equivalent, heat treatment and temperature process of R20990, The peak hardness can be achieved, Contains all of the specification, welding properties, let us in R20990 this steel grade have a more comprehensive understanding, Download the full R20990 PDF version of this datasheet.
Chemical composition (wt.%) of R20990
| Elements | Min.（≥） | Max.（≤） |
|---|---|---|
| C | - | 0.12 |
| Si | - | 0.30 |
| Mn | - | 0.80 |
| Cr | - | 19.00 |
| Ni | - | 14.00 |
| Mo | - | - |
| Co | - | - |
| W | - | - |
| Al | - | - |
| Cu | - | - |
| Ti | - | - |
| Fe | - | remaining |
| Nb | - | 1.60 |
Mechanical Properties of R20990
| Rp0.2 (MPa) | Rm (MPa) | Impact KV (J) |
Elongation A (%) |
A Z (%) | Delivery | Hardness HB |
|---|---|---|---|---|---|---|
| 417 (≥) | 686 (≥) | 33 | 21 | 34 | Solution & Aging, Ann, Ausaging, Q+T | 312 |