S275JR vs S235JR
Chemical Composition:
The chemical compositions of S235JR and S275JR also differ. While both contain no more than 0.21% carbon, S275JR typically contains no more than 0.60% silicon (Si) and no more than 1.70% manganese (Mn), while S235JR contains no more than 0.35% silicon (Si) and no more than 1.40% manganese (Mn). Furthermore, there are slight differences in the content of phosphorus (P) and sulfur (S).
Chemical Composition Comparison
| Element | S235JR (%) | S275JR (%) |
|---|---|---|
| Carbon (C) | ≤0.22 | ≤0.21 |
| Silicon (Si) | ≤0.55 | ≤0.50 |
| Manganese (Mn) | ≤1.70 | ≤1.50 |
| Phosphorus (P) | ≤0.045 | ≤0.035 |
| Sulfur (S) | ≤0.045 | ≤0.035 |
Strength Grade:
S235JR and S275JR are different strength grades. S235JR typically has a tensile strength between 360-510 MPa and a yield strength of 235 MPa. S275JR typically has a tensile strength between 410-560 MPa and a yield strength of 275 MPa. Therefore, S275JR is slightly stronger than S235JR.
Mechanical Properties Comparison
| Property | S235JR (MPa) | S275JR (MPa) |
|---|---|---|
| Yield Strength (Re) | ≥235 | ≥270 |
| Tensile Strength (Rm) | 360-510 | 430-580 |
| Elongation (A) | ≥18% | ≥14% |
Impact Toughness:
S235JR and S275JR also differ in impact toughness. S275JR generally has better impact toughness and maintains good toughness at low temperatures.
| Property | S235JR | S275JR |
|---|---|---|
| Impact Toughness (KV) | ≥27J (0℃) | ≥27J (20℃) |
| Hardness (HBW) | 120-170 | ≤187 |
Applications:
Due to the differences in strength and impact toughness, S235JR and S275JR may have different applications. S235JR is commonly used in general building structures, industrial plants, bridges, etc. S275JR, due to its higher strength and better impact toughness, is suitable for structures subjected to larger loads and moments, such as high-rise buildings and bridges.
S275JR and S235JR Square Tube in stock
