S235JR is a non-alloy structural steel grade specified by EN 10025-2. It is commonly used in construction and engineering industries to make structural elements and parts that require good weldability and machinability.
Equivalent Materials:
ASTM A36: ASTM A36 is an American standard carbon structural steel specification, which is often used in structural applications. It is closest to S235JR in terms of chemical composition.
JIS Ss400: SS400 is a Japanese standard (JIS G3101) for structural steel that is equivalent to S235JR.
ISO E235B: ISO E235B is a European standard non-alloy structural steel grade, which is equivalent to S235JR under EN 10025-2.
Chemical Composition Comparison (Typical):
S235JR:
Carbon (C): 0.17% - 0.20%
Silicon (Si): 0.35%
Manganese (Mn): 1.40%
Phosphorus (P): 0.045%
Sulfur (S): 0.045%
ASTM A36:
Carbon (C): 0.25% (max)
Manganese (Mn): 0.80% - 1.20%
Phosphorus (P): 0.04% (max)
Sulfur (S): 0.05% (max)
JIS SS400:
Carbon (C): 0.05% - 0.21%
Manganese (Mn): 0.50% - 1.50%
Phosphorus (P): 0.045% (max)
Sulfur (S): 0.050% (max)
Mechanical Properties Comparison (Typical):
S235JR, ASTM A36, JIS SS400:
Yield Strength (min): 235 MPa
Tensile Strength: 360-510 MPa
Summary:
S235JR is widely used across various industries due to its good mechanical and chemical properties, including weldability and machinability. Its equivalents include ASTM A36 in the US, JIS SS400 in Japan, and ISO E235B in Europe, all providing similar structural capabilities suitable for general engineering and construction applications.
Brief Comparison Table of International Equivalent Grades for S235JR Steel
| Standard System | Most Commonly Used Equivalent Grade | Key Similarities and Main Differences |
|---|---|---|
| European (EN) | S235JR (EN 10025 - 2) | This is the benchmark grade itself. |
| International (ISO) | E235B (ISO 630) | The most straightforward international equivalent grade, with nearly identical mechanical properties and technical requirements. |
| American (ASTM) | ASTM A36 | Most versatile in functional equivalence. It has the same application (general structures). Difference: A36 has a slightly higher yield strength (≥250 MPa), and the chemical composition requirements are different. |
| Japanese (JIS) | SS400 (JIS G3101) | A commonly used general structural steel in Japanese standards. Main difference: SS400 is defined by tensile strength (400 - 510 MPa) instead of yield strength, and usually has no impact energy requirement. |
| Chinese (GB) | Q235B (GB/T 700) | The most direct Chinese equivalent grade. Q235 represents the yield strength, and B represents the quality grade (room - temperature impact is required), corresponding to the meaning of JR. |
| German (Old DIN) | St37 - 2 (DIN 17100) | A historical grade that has been replaced by the EN standard S235JR and can be regarded as equivalent. |
Core Equivalence Basis: Minimum yield strength ~235 MPa, and it provides room - temperature (+20°C) impact toughness guarantee. It belongs to the most common and versatile general structural steel grade.
Is S235JR equivalent to A36?
The term "235" refers to the minimum yield strength (MPa) for steel thickness less than 16 mm. The "JR" indicates the energy-related quality level of the Charpy impact test (27 J, 20℃ temperature). ASTM A36 material is equivalent to steel S235JR.
What is S235JR steel grade?
S235JR is a widely used, cost-effective, non-alloy structural steel (EN 10025 standard) known for good weldability and formability, indicated by its minimum 235 MPa yield strength (S) and a 27 Joule impact energy test at room temperature (JR), making it suitable for general construction, automotive parts, and machinery, though it requires protective coatings for corrosion resistance as it's not inherently stainless.
What does the JR stand for in S235JR?
S235JR: A frequently used type of steel, S235JR is known for its weldability, machinability, durability, and wear-resistance. Its "JR" suffix indicates that its minimum impact energy is 27 joules and that it underwent an impact test at 20°C