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EN S275JR steel is an unalloyed low carbon mild steel grade supplied as hot rolled. As a mild steel specification, steel grade S275JR provides low strength with good machinability and steel S275JR is suitable for welding. The average minimum yield strength for steel grade S275JR is 275 Mpa, hence it is named S275. And JR symbol 20 temperature impact test.
EN mild steel grade S275JR properties – Chemical composition:
| Chemical elements | C≤ 16mm max | C>16mm max | Si max | Mn max | P max. | S max. |
| %,by mass | 0.21 | 0.21 | -- | 1.50 | 0.045 | 0.045 |
EN mild steel grade S275JR properties – Yield strength:
| Nominal thickness (mm) | to 16 | 16-40 | 40-63 | 63-80 | 80-100 | 100-125 |
| ReH - Minimum yield strength (MPa) | 275 | 265 | 255 | 245 | 235 | 225 |
EN mild steel grade S275JR properties – Tensile strength:
| Nominal thickness (mm) | 3 - 100 | 100 - 125 |
| Rm - Tensile strength (MPa) | 410 - 560 | 400 - 540 |
EN mild steel grade S275JR properties – Elongation:
| Nominal thickness (mm) | 3 - 40 | 40 - 63 | 63 - 100 | 100 - 125 |
| A - Minimum elongation Lo = 5,65√ So (%) | 23 | 22 | 21 | 19 |
EN mild steel grade S275JR properties allow steel grade S275JR to be used for structural, manufacturing plant, machinery, mining equipment and so on fields. Steel grade S275JR superceded the previous British Standard BS 4360 43A which was offically withdrawn. BBN steel is mild steel S275JR supplier, delivering S275JR steel to the world.
