s275jr vs s275j0
Characteristics of S275JR Steel
S275JR is a high-quality carbon structural steel conforming to European standards. Compared to ordinary carbon structural steel, it has more lenient restrictions on carbon content, performance range, and residual elements such as phosphorus and sulfur. It is particularly noteworthy that European standard S275JR carbon steel is similar to the steel grades listed in China's GB/T 700 and GB/T 1591 standards. Both belong to carbon structural steel and low-alloy structural steel for engineering and structural applications, and are typically delivered in untreated form. Specifically, S185 corresponds to China's Q195, while S235 and S275 correspond to my country's Q235 and Q275, respectively. S235 corresponds to Q235, and S275 corresponds to Q275. Furthermore, except for S185, all other steel grades require impact tests at 20℃, 0℃, and -20℃.
Properties of S275J0 Steel
S275J0 follows the same chemical composition standard as S275JR, but the main difference lies in the impact requirements. S275J0 adheres to the same chemical composition standard as S275JR, meaning its main components, such as carbon, manganese, phosphorus, and sulfur, are similar in content. Notably, S275J0 requires a zero-degree impact test, indicating better resistance at low temperatures.
Comparison of Differences
The main difference between S275JR and S275J0 lies in their impact requirements. Specifically, S275JR only requires a room-temperature impact test, while S275J0 must withstand a zero-degree impact. This demonstrates the superiority of S275J0 in lower-temperature environments. S275JR steel plays a vital role in the construction industry and various engineering projects. It is also a key structural component for heavy machinery such as drilling rigs, electric shovels, electric wheel dump trucks, excavators, and bulldozers. In addition, S275JR steel is widely used in various types of cranes and hydraulic supports in coal mines to ensure their stability and durability.
1. Chemical Composition Comparison
| Element | S275JR (%) | S275J0 (%) |
|---|---|---|
| Carbon (C) | ≤0.21 | ≤0.18 |
| Manganese (Mn) | ≤1.50 | ≤1.50 |
| Phosphorus (P) | ≤0.035 | ≤0.030 |
| Sulfur (S) | ≤0.035 | ≤0.030 |
| Nitrogen (N) | ≤0.012 | ≤0.012 |
2. Mechanical Properties Comparison
| Property | S275JR (MPa) | S275J0 (MPa) |
|---|---|---|
| Yield Strength (Re) | ≥270 | ≥275 |
| Tensile Strength (Rm) | 430-580 | 430-580 |
| Elongation (A) | ≥14% | ≥14% |
3. Mechanical Performance Comparison
| Property | S275JR | S275J0 |
|---|---|---|
| Impact Toughness (KV) | ≥27J (20℃) | ≥27J (0℃) |
| Hardness (HBW) | ≤187 | ≤187 |
S275JR steel, a European standard steel grade, follows the EN10025-2 standard, which is considered the standard for low-alloy steels in Europe. Furthermore, S275JR steel conforms to the EN10025 standard, which was developed by the European Committee for Standardization and is implemented in many European countries.
s275jr and s275j0 square tube factory
