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What is the difference between S275 and S275JR steel? For this question, we need to check begin the origin EN10025-2 standard for non-alloy structural steels. The S275 is not a specific steel grade, it is a genaral name for S275JR steel, S275J2 steel and S275J0 steel. S275JR steel is only one of S275 steel. So please do not mix S275 and S275JR steel.
S275 and S275JR steel chemical composition - ladle analysis:
| Steel Grade | С | Mn | S | P | N | Сu | |
| S275 | JR | <=0.22 | <=1.50 | 0.035 | 0.035 | <=0.012 | <=0.55 |
| J0 | <=0.18 | <=1.50 | 0.03 | 0.03 | <=0.012 | <=0.55 | |
| J2 | <=0.18 | <=1.50 | 0.025 | 0.025 | - | <=0.55 | |
S275 and S275JR steel mechanical properties:
| Grade | Min. Yield strength (t≤16mm) |
Tensile strength (t≤400mm) |
Elongation A (3mm≤t≤40mm) min |
Temperature/℃ | Impact energy (Longitudinal)/J min |
|
| S275 | JR | 275 Mpa | 380-580 Mpa | 15% | 20 | 27 |
| J0 | 275 Mpa | 380-580 Mpa | 15% | 0 | 27 | |
| J2 | 275 Mpa | 380-580 Mpa | 13% | -20 | 27 | |
When we are told the S275 steel is needed. First, we need to confirm whether S275JR steel, S275J2 steel or S275J0 steel is needed. The main difference among the three S275 steel lies in their impact temperature: 20℃ of S275JR steel, -20℃ of S275J2 steel and 0℃ of S275J0 steel.
