304 Stainless Steel Round Bar from Gnee
Mar 23, 2026
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🧪 Chemical Composition
Chemical Composition:
| Element | Min % | Max % | Typical % | ASTM A276 Requirement |
|---|---|---|---|---|
| Carbon (C) | - | 0.080 | 0.045 | ≤ 0.08 |
| Chromium (Cr) | 18.0 | 20.0 | 18.5 | 18.0-20.0 |
| Nickel (Ni) | 8.0 | 12.0 | 9.2 | 8.0-12.0 |
| Manganese (Mn) | - | 2.00 | 1.45 | ≤ 2.00 |
| Silicon (Si) | - | 0.75 | 0.42 | ≤ 0.75 |
| Phosphorus (P) | - | 0.045 | 0.028 | ≤ 0.045 |
| Sulfur (S) | - | 0.030 | 0.015 | ≤ 0.030 |
| Nitrogen (N) | - | 0.10 | 0.06 | ≤ 0.10 |
| Iron (Fe) | Balance | Balance | 70.1 | Balance |
⚙️ Mechanical Properties
Mechanical Properties:
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | 515 MPa min | 620 MPa | ASTM A370 | Room Temp |
| Yield Strength (0.2%) | 205 MPa min | 310 MPa | ASTM A370 | Room Temp |
| Elongation | 40% min | 50% | ASTM A370 | Room Temp |
| Hardness (Brinell) | 201 HB max | 180 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | 92 HRB max | 88 HRB | ASTM E18 | Room Temp |
| Modulus of Elasticity | - | 200 GPa | ASTM E111 | Room Temp |
| Impact Energy (Charpy V) | - | 325+ J | ASTM E23 | Room Temp |
🔬 Physical Properties
Physical Properties:
| Property | Value | Unit | Temperature | Test Standard |
|---|---|---|---|---|
| Density | 8.00 | g/cm3 | 20°C | ASTM B311 |
| Melting Point | 1400-1450 | °C | - | DSC Analysis |
| Thermal Conductivity | 16.2 | W/m·K | 100°C | ASTM E1461 |
| Specific Heat | 500 | J/kg·K | 0-100°C | ASTM C351 |
| Linear Expansion | 17.2 | μm/m·K | 0-100°C | ASTM E228 |
| Electrical Resistivity | 720 | n|°¤m | 20°C | ASTM B193 |
| Magnetic Permeability | 1.02 | μ/μ₀ | Room Temp | ASTM A342 |
| Curie Temperature | None | - | - | Non-magnetic |
📏 Product Specifications
Product Specifications:
| Specification | Available Range | Standard Length | Custom Available | Tolerance |
|---|---|---|---|---|
| Diameter | 3mm - 300mm | Various | Yes | h9 (±0.1mm) |
| Length | 1m - 12m | 6m | Yes | +50mm/-0mm |
| Surface Finish | Hot Rolled, Cold Drawn, Bright | Cold Drawn | Yes | Ra ≤ 0.8μm |
| Condition | Annealed, Cold Worked | Annealed | Both | ASTM A276 |
| Straightness | 1mm/m max | Standard | Precision | ±0.5mm/m |
| End Finish | Cut, Machined, Chamfered | Cut | Yes | Square ±1° |
| Standards Compliance | ASTM A276, A479, A582 | A276 | Multiple | Full compliance |
| Size Tolerance | h8 to h11 | h9 | Yes | ISO 286-2 |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Bundles, Hexagonal, Individual | Bundles | Custom | Export standard |
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