GOST 20295-85 K52 Seamless Steel Pipe
| Steel grade | Chemical composition,%,max | ||||||||
| C | Mn | Si | S | P | Cr | Ni | Cu | V | |
| Carbon steel | 0.22 | 0.65 | 0.37 | 0.04 | 0.035 | 0.25 | 0.3 | 0.3 | – |
| Low alloy steel | 0.2 | 1.65 | 0.6 | 0.035 | 0.033 | 0.8 | 0.3 | 0.3 | 0.1 |
| Steel grade | Tensile strength,MPa | Yield strength,MPa | Elongation,% |
| K34 | 334 | 206 | 24 |
| K38 | 373 | 235 | 22 |
| K42 | 412 | 245 | 21 |
| K50 | 491 | 343 | 20 |
| K52 | 510 | 353 | 20 |
| K55 | 540 | 373 | 20 |