Mild Steel Sheet
Technical Specifications
Material:
Q345
Standard:
ASTM, AISI, GB, JIS, DIN, BS
Technical Treatment:
Hot-roll, Cold Roll
Certification:
ISO,SGS
HS Code:
7208519000
Product Description
Mild Steel Plate Description
| Plate Type | Thickness Range | Width Range | Length Range | Common Standards | Surface Finish | Typical Applications |
|---|---|---|---|---|---|---|
| Thin Plate | 0.5-3.0mm (0.02-0.12") |
600-2000mm (24-79") |
1000-6000mm (39-236") |
ASTM A1008 JIS G3141 EN 10130 |
Cold Rolled Pickled & Oiled |
Automotive panels Appliances Electronics |
| Medium Plate | 3.0-20mm (0.12-0.79") |
1000-3000mm (39-118") |
2000-12000mm (79-472") |
ASTM A36 EN 10025 JIS G3101 |
Hot Rolled Pickled |
General construction Machinery parts Fabrication |
| Thick Plate | 20-100mm (0.79-3.94") |
1500-4000mm (59-157") |
3000-18000mm (118-709") |
ASTM A514 GB/T 3274 EN 10025 |
Hot Rolled Normalized |
Heavy construction Shipbuilding Pressure vessels |
Material Grades & Mechanical Properties
| Grade | Yield Strength (MPa / ksi) |
Tensile Strength (MPa / ksi) |
Elongation (%) |
Hardness (HB) |
Carbon Content (%) |
Primary Applications |
|---|---|---|---|---|---|---|
| ASTM A36 | ≥250 / 36 | 400-550 / 58-80 | ≥20 | 119-162 | ≤0.26 | General structural work |
| Q235B | ≥235 / 34 | 375-500 / 54-73 | ≥25 | 120-160 | ≤0.20 | Important structures |
| Q345B | ≥345 / 50 | 470-630 / 68-91 | ≥21 | 150-200 | ≤0.20 | High-strength structures |
| SPCC | ≥270 / 39 | 350-430 / 51-62 | ≥30 | 110-150 | ≤0.12 | Deep drawing applications |
| S355JR | ≥355 / 51 | 470-630 / 68-91 | ≥22 | 160-220 | ≤0.24 | Structural engineering |
Dimensional Tolerances & Quality Standards
| Thickness Range | Thickness Tolerance | Width Tolerance | Length Tolerance | Flatness | Edge Quality | Surface Roughness |
|---|---|---|---|---|---|---|
| 0.5-2.0mm | ±0.05mm | ±3mm | ±5mm | ≤3mm/m | Mill edge | Ra ≤ 1.6μm |
| 2.0-6.0mm | ±0.1mm | ±5mm | ±10mm | ≤5mm/m | Mill/Cut edge | Ra ≤ 3.2μm |
| 6.0-25mm | ±0.2mm | ±8mm | ±15mm | ≤8mm/m | Cut edge | Ra ≤ 6.3μm |
| 25-100mm | ±0.5mm | ±10mm | ±20mm | ≤10mm/m | Cut edge | Ra ≤ 12.5μm |
Key Advantages & Benefits
Excellent Workability
Easy to cut, bend, weld, and machine. Superior formability for complex shapes and deep drawing applications.
Cost-Effective Solution
Competitive pricing with reliable supply chain. Excellent value for general construction and fabrication projects.
Consistent Quality
Uniform mechanical properties and dimensional accuracy. Meets international quality standards and certifications.
Wide Availability
Extensive range of sizes and grades available. Fast delivery times and flexible ordering quantities.
Reliable Performance
Proven track record in various applications. Consistent mechanical properties and long-term durability.
Versatile Applications
Suitable for construction, automotive, shipbuilding, and general fabrication across multiple industries.
Important Technical Notes
- All specifications are for standard grades and may vary based on specific requirements
- Custom dimensions and special grades available upon request with minimum order quantities
- Mechanical properties are typical values and may vary depending on production batch
- Surface finish and edge quality can be customized according to application requirements
- Material certificates and test reports available for all shipments
- Storage should be in dry conditions to prevent corrosion and maintain surface quality
- Welding procedures should follow AWS or equivalent standards for optimal joint performance
- Heat treatment may be required for specific applications to achieve desired properties
Chemical Composition Standards
| Grade | Carbon (C) % |
Manganese (Mn) % |
Silicon (Si) % |
Phosphorus (P) % |
Sulfur (S) % |
Other Elements % |
|---|---|---|---|---|---|---|
| ASTM A36 | ≤0.26 | 0.60-0.90 | ≤0.40 | ≤0.04 | ≤0.05 | Cu ≥0.20 (when specified) |
| Q235B | ≤0.20 | ≤1.40 | ≤0.35 | ≤0.045 | ≤0.045 | - |
| Q345B | ≤0.20 | 1.00-1.60 | ≤0.55 | ≤0.035 | ≤0.035 | Nb, V, Ti ≤0.15 |
| S355JR | ≤0.24 | ≤1.60 | ≤0.55 | ≤0.040 | ≤0.040 | Cu ≤0.55 |
Testing & Certification Requirements
| Test Type | Standard Method | Frequency | Acceptance Criteria | Documentation |
|---|---|---|---|---|
| Tensile Test | ASTM A370 / EN 10002 | Per heat/batch | Meet grade requirements | Mill Test Certificate |
| Chemical Analysis | ASTM E415 / EN 10204 | Per heat | Within specified limits | Chemical Report |
| Dimensional Check | ASTM A6 / EN 10029 | Continuous | Within tolerance | Inspection Report |
| Surface Quality | Visual / ASTM A6 | 100% inspection | Grade specific standards | Quality Certificate |
