As a leading manufacturer of alloy structural steel plate with 17+ years of expertise, GNEE Steel specializes in supplying ASTM, EN, GB, and JIS standard steel-including A283 Grade C and its global equivalents.
Understanding the equivalents of A283 Grade C is critical for global projects, as it ensures material compatibility, compliance with local standards, and flexible sourcing.
Whether you need ASTM-certified plates or their international counterparts, GNEE delivers consistent quality, full traceability, and factory-direct pricing to clients in 50+ countries.
A283 Grade C: Overview of the ASTM Alloy Structural Steel Plate
A283 Grade C is a general-purpose alloy structural steel plate defined by ASTM A283, a standard for low- to medium-strength carbon steel. It is widely used in non-pressure structural applications-such as building frames, non-pressurized storage tanks, and mild-duty industrial components-due to its good weldability, formability, and cost-effectiveness.
Key properties of A283 Grade C include a minimum yield strength of 205 MPa, tensile strength of 400–550 MPa, and elongation of 22% (in 200mm). At GNEE, our A283 Grade C plates are produced to meet ASTM's strict chemical and mechanical requirements, with optional heat treatment for enhanced ductility.
GNEE's A283 Grade C alloy structural steel plates with ASTM certification marks and size labels
European (EN) Equivalent of A283 Grade C Alloy Structural Steel Plate
In the European standard (EN), the closest equivalent to A283 Grade C alloy structural steel plate is S235JR (specified under EN 10025-2). This grade matches A283 Grade C in core properties and application scope, making it interchangeable for most European projects.
The table below compares key parameters of A283 Grade C and its EN equivalent:
| Property | A283 Grade C (ASTM) | S235JR (EN 10025-2) |
|---|---|---|
| Minimum Yield Strength | 205 MPa | 235 MPa (≤16mm thickness) |
| Tensile Strength | 400–550 MPa | 360–510 MPa |
| Elongation (Min) | 22% (200mm) | 26% (16mm thickness) |
| Main Application | Structural components, non-pressurized tanks | Building frames, bridges, general structural parts |
GNEE supplies both A283 Grade C and S235JR plates, with the latter optimized for compliance with CE marking requirements for European markets.
Chinese (GB) Equivalent of A283 Grade C Alloy Structural Steel Plate
Under China's national standard (GB), the equivalent of A283 Grade C alloy structural steel plate is Q235B (specified under GB/T 700). Q235B is one of the most widely used structural steels in China, sharing A283 Grade C's focus on general-purpose, low-strength structural applications.
A side-by-side comparison of key properties:
| Property | A283 Grade C (ASTM) | Q235B (GB/T 700) |
|---|---|---|
| Minimum Yield Strength | 205 MPa | 235 MPa |
| Tensile Strength | 400–550 MPa | 375–500 MPa |
| Carbon Content (Max) | 0.24% | 0.22% |
| Impact Test | Optional | Required (20°C, ≥27J) |
For clients with projects in China or requiring GB-standard steel, GNEE's Q235B plates are fully compatible with designs originally specified for A283 Grade C.
Japanese (JIS) Equivalent of A283 Grade C Alloy Structural Steel Plate
In the Japanese Industrial Standard (JIS), the equivalent of A283 Grade C alloy structural steel plate is SS400 (specified under JIS G3101). SS400 is a general structural carbon steel, widely used in Japanese construction, machinery, and tank manufacturing-matching A283 Grade C's versatility.
Key property comparisons:
| Property | A283 Grade C (ASTM) | SS400 (JIS G3101) |
|---|---|---|
| Minimum Yield Strength | 205 MPa | 245 MPa (≥16mm thickness) |
| Tensile Strength | 400–550 MPa | 400–510 MPa |
| Elongation (Min) | 22% (200mm) | 21% (200mm) |
| Weldability | Good | Excellent |
GNEE supplies SS400 plates with JIS certification, ensuring compatibility for projects in Japan or with Japanese engineering specifications.
Key Considerations When Using A283 Grade C Equivalents
When substituting A283 Grade C alloy structural steel plate with its global equivalents, keep these 3 critical factors in mind-guidelines GNEE uses to support clients:
- Thickness-Dependent Properties: Some equivalents (e.g., S235JR, SS400) have yield strength variations with plate thickness. Ensure the equivalent grade meets the required strength at your specific thickness.
- Impact Test Requirements: Unlike A283 Grade C (optional impact test), equivalents like Q235B mandate impact testing. Confirm if your project requires this to avoid non-compliance.
- Market-Specific Certifications: For European markets, S235JR needs CE marking; for China, Q235B requires GB/T 700 certification. GNEE provides all necessary certifications for each equivalent grade.
Why Choose GNEE for A283 Grade C & Its Equivalents?
GNEE is a trusted supplier for A283 Grade C and its global equivalents due to 3 core advantages:
- Full Standard Coverage: We supply A283 Grade C (ASTM), S235JR (EN), Q235B (GB), and SS400 (JIS)-eliminating the need for multiple suppliers for global projects.
- Quality Consistency: All plates undergo strict testing (chemical composition, mechanical properties) and come with material test reports (MTRs) for traceability.
- Customization & Delivery: We offer cut-to-size services, heat treatment, and fast delivery (10–15 days for standard grades) to meet tight project timelines.
Alloy Structural Steel Plate Product
To explore our full range of structural steel, visit our Alloy Structural Steel Plate Product Line Page.
Conclusion
The global equivalents of A283 Grade C alloy structural steel plate-including S235JR (EN), Q235B (GB), and SS400 (JIS)-enable flexible sourcing and compliance with regional standards for global projects. Each equivalent matches A283 Grade C's general-purpose structural role, with minor variations in strength and testing requirements that GNEE helps clients navigate.
Don't let standard differences delay your project-contact GNEE today to get a free quote for A283 Grade C or its equivalents, and let our team ensure you get the right steel for your regional and application needs.
