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Wuxi, Jiangsu
24/7 Customer Support
Mon - Fri: 9:00 - 17:30
Stainless steel bar is a bar with a cross-section of round, square, hexagonal, etc., usually made of austenitic stainless steel (such as 304 stainless steel round bar, 316 stainless steel round bar) or martensitic stainless steel (such as 410, 420).
steel bar has excellent corrosion resistance, high strength and good processing performance, and is suitable for manufacturing mechanical parts, structural parts and decorative parts.
Walmay Steel’s stainless steel bars are made of high-quality raw materials, precision processing and strict quality control to ensure that each bar meets international standards and meets the diverse needs of customers.
The chemical composition of stainless steel bars is the basis of their excellent performance. The following is its typical chemical composition range (taking 304, 316, 410, 430 as examples):
| element | Fe | Cr | Ni | Mo | C | Mn | Si | P | S |
| 304 (%) | balance | 18.0 – 20.0 | 8.0 – 10.5 | – | ≤0.08 | ≤2.0 | ≤1.0 | ≤0.045 | ≤0.03 |
| 316 (%) | balance | 16.0 – 18.0 | 10.0 – 14.0 | 2.0 – 3.0 | ≤0.08 | ≤2.0 | ≤1.0 | ≤0.045 | ≤0.03 |
| 410 (%) | balance | 11.5 – 13.5 | ≤0.75 | – | 0.08 – 0.15 | ≤1.0 | ≤1.0 | ≤0.04 | ≤0.03 |
| 430 (%) | balance | 16.0 – 18.0 | ≤0.75 | – | ≤0.12 | ≤1.0 | ≤1.0 | ≤0.04 | ≤0.03 |
| Performance | 304 | 316 | 410 | 430 | Test standards |
| Tensile Strength | ≥515 MPa | ≥515 MPa | ≥480 MPa | ≥450 MPa | ASTM A276 |
| Yield Strength | ≥205 MPa | ≥205 MPa | ≥275 MPa | ≥205 MPa | ASTM A276 |
| Elongation | ≥40% | ≥40% | ≥20% | ≥22% | ASTM A276 |
| Hardness | ≤90 HRB | ≤90 HRB | ≤95 HRB | ≤89 HRB | ASTM E18 |
| Impact Toughness | ≥100 J | ≥100 J | ≥50 J | ≥50 J | ASTM A370 |
| Density | 7.93 g/cm³ | 7.98 g/cm³ | 7.75 g/cm³ | 7.70 g/cm³ | – |
The physical properties of stainless steel bars are important indicators of their applicability. The following are its typical physical performance parameters (taking 304, 316, 410, and 430 as examples):
| Performance | 304 | 316 | 410 | 430 |
| Density) | 7.93 g/cm³ | 7.98 g/cm³ | 7.75 g/cm³ | 7.70 g/cm³ |
| Melting Point | 1399°C – 1427°C | 1371°C – 1399°C | 1480°C – 1530°C | 1427°C – 1510°C |
| Thermal Expansion | 17.3 μm/m·°C (20°C-100°C) | 16.5 μm/m·°C (20°C-100°C) | 10.4 μm/m·°C (20°C-100°C) | 10.4 μm/m·°C (20°C-100°C) |
| Thermal Conductivity | 16.2 W/m·K (100°C) | 16.3 W/m·K (100°C) | 24.9 W/m·K (100°C) | 26.0 W/m·K (100°C) |
| Electrical Resistivity | 0.72 μΩ·m (20°C) | 0.74 μΩ·m (20°C) | 0.57 μΩ·m (20°C) | 0.60 μΩ·m (20°C) |
| Magnetic Permeability | 1.02 | 1.02 | 1.02 | 1.02 |
Walmay Steel ss round bar follows the standards
ASTM A276: Stainless steel bars and shapes.
ASTM A479: Stainless steel bars for boilers and other pressure vessels.
JIS G4303: Stainless steel bars.
GB/T 1220: Stainless steel bars.
Material: 304, 304L, 316, 316L, 321, 347, etc.
Standard: ASTM A276, ASTM A479, JIS G4303, GB/T 1220
Shape: stainless steel round rod, stainless steel square rod, brass hexagonal bar
Diameter or side length range: 5mm-300mm
Length range: 1000mm-6000mm (customized length supported)
Surface treatment: bright annealing (BA), brushed (HL), sandblasting (SB), polished (Mirror)
Delivery status: hot rolled (Hot Rolled), cold rolled (Cold Rolled), solution treated (Solution Annealed)
Machinery manufacturing: used to manufacture mechanical parts, shaft parts and structural parts.
Architectural decoration: used to manufacture building curtain walls, railings, doors and windows and decorative parts.
Medical equipment: used to manufacture surgical instruments, medical containers and laboratory equipment.
Automobile manufacturing: used to manufacture exhaust systems and fuel systems.
Food processing: used to manufacture food processing equipment, storage tanks and pipelines.
Classification by material:
Austenitic stainless steel bars: such as 304 and 316, with good corrosion resistance, suitable for most environments.
Martensitic stainless steel bars: such as 410 and 420, with high hardness, suitable for wear-resistant parts.
Ferritic stainless steel bars: such as 430, with low cost, suitable for general use.
Classification by shape:
stainless round bar: with a round cross-section, suitable for shaft parts and structural parts.
stainless square bar: with a square cross-section, suitable for mechanical parts and decorative parts.
hexagonal bar: with a hexagonal cross-section, suitable for bolts and nuts.
Classification by surface treatment:
Bright annealing (BA): with a smooth surface, suitable for decoration and food industries.
Wire drawing (HL): with a fine texture on the surface, suitable for architectural decoration.
Sandblasting (SB): with a frosted surface effect, suitable for wear-resistant parts.
Polishing (Mirror): with a mirror effect on the surface, suitable for highly decorative occasions.
Stainless steel
Walmay Steel provides stainless steel square bars to customers with product specifications
Material: 304, 304L, 316, 316L, 321, 347, etc.
Standard: ASTM A276, ASTM A479, JIS G4303, GB/T 1220
Shape: square bar
Side length range: 5mm-300mm
Length range: 1000mm-6000mm (custom lengths are available)
The cheapest stainless steel model is usually 201 stainless steel.
Walmay Steel stainless steel is relatively cheap, but its corrosion resistance and mechanical properties may be slightly inferior to other high-end stainless steel models, such as 304 or 316 stainless steel.
For some application scenarios with strict cost requirements and relatively mild use environments, 201 stainless steel is an affordable choice.
Stainless steel bars have higher corrosion resistance and strength and are suitable for high-end applications, while regular steel bars are lower in cost and suitable for general use.
If you have any questions, please use the form below to send us a message or contact Walmay Metal’s office location.
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