EN 10296-2 SS Rectangular Tubing 304L SS RHS Low Carbon For Food Pharma Applications
Price:
Negotiable (Request a Quote)
MOQ:
100kg
Delivery Time:
15-25days
Brand:
Baosteel，TISCO
Product Description
304L Rectangular Tubing is a low-carbon version of the popular 304 stainless steel, manufactured as welded or seamless rectangular hollow sections (RHS). The "L" stands for "low carbon" (≤ 0.035%), which provides superior weldability and eliminates the risk of intergranular corrosion after welding.
Unlike standard 304, 304L can be used in the as-welded condition without requiring post-weld heat treatment (solution annealing). This makes it the preferred choice for welded structures, food processing equipment, pharmaceutical facilities, and architectural applications where corrosion resistance and fabrication ease are critical.
| Quick Facts | Value |
|---|---|
| Grade | 304L (UNS S30403 / 1.4307) |
| Shape | Rectangular |
| Standards | ASTM A554, ASTM A269, EN 10296-2, EN 10297-2 |
| Process | Welded (cold-formed) or seamless |
| Key Feature | Low carbon, excellent weldability |
| Primary Use | Welded structures, food/pharma equipment, architectural |
Specifications, Dimensions, Standards & Packaging
Product Specifications
| Parameter | Details |
|---|---|
| Standard | ASTM A554 (mechanical), ASTM A269 (seamless), EN 10296-2 (welded), EN 10297-2 (seamless) |
| Material Grade | 304L / UNS S30403 / 1.4307 |
| Shape | Rectangular Hollow Section (RHS) |
| Manufacturing Process | Cold-formed welded or cold-drawn seamless |
| Condition | Annealed (solution treated) |
| Surface Finish | Mill finish, pickled, brushed (#4), polished (#8 mirror) |
| Length | 6,000 mm (standard) / 12,000 mm / custom cut |
| End Finish | Plain cut, deburred / Plastic end caps (optional) |
Standard Size Range (Rectangular Tube)
| Height * Width (mm) | Wall Thickness (mm) |
|---|---|
| 20 * 10 | 1.0 – 1.5 |
| 30 * 15 | 1.2 – 2.0 |
| 40 * 20 | 1.5 – 2.5 |
| 50 * 25 | 1.5 – 3.0 |
| 50 * 30 | 1.5 – 3.0 |
| 60 * 30 | 1.5 – 3.0 |
| 60 * 40 | 2.0 – 4.0 |
| 80 * 40 | 2.0 – 4.0 |
| 80 * 60 | 2.5 – 5.0 |
| 100 * 40 | 2.5 – 5.0 |
| 100 * 50 | 2.5 – 5.0 |
| 100 * 80 | 3.0 – 6.0 |
| 120 * 60 | 3.0 – 6.0 |
| 120 * 80 | 3.0 – 6.0 |
| 150 * 100 | 3.0 – 8.0 |
| 200 * 100 | 4.0 – 8.0 |
| 250 * 150 | 5.0 – 10.0 |
Custom sizes available upon request.
Applicable Standards
| Standard | Description | Typical Use |
|---|---|---|
| ASTM A554 | Welded stainless steel mechanical tubing | Architectural, handrails, furniture |
| ASTM A269 | Seamless stainless steel tubing | Sanitary, pharmaceutical, high purity |
| EN 10296-2 | Welded stainless steel structural tubes | Construction, general fabrication |
| EN 10297-2 | Seamless stainless steel mechanical tubes | High-strength mechanical components |
Dimensional Tolerances
| Parameter | ASTM A554 | EN 10296-2 |
|---|---|---|
| Height & Width | ± 0.4 – 0.8 mm | ± 1% (max ± 5 mm) |
| Wall thickness | ± 10% | ± 10% (min ± 0.2 mm) |
| Straightness | ≤ 1.0 mm/m | ≤ 0.15% of length |
| Twist | ≤ 1° + 0.5°/m | ≤ 2 mm + 0.5 mm/m |
| Corner radius | 1.5* – 2.5* wall | ≤ 3* wall thickness |
Packaging Methods
| Packaging Type | Description |
|---|---|
| Bundled with steel straps | 0.5 – 2 tons per bundle |
| Plastic end caps | Protects tube ends and internal surface |
| Interleaved paper | Prevents surface scratches between tubes |
| Wooden crates | For export and polished finishes |
| Waterproof wrapping | For ocean / long-distance shipment |
| Individual poly bag | For polished/mirror finish tubes |
Chemical Composition
Per ASTM A240 / EN 10088, 304L has the following chemical requirements.
| Element | Content (%) | Function |
|---|---|---|
| Carbon (C) | ≤ 0.035 | Low carbon prevents carbide precipitation |
| Chromium (Cr) | 18.0 – 20.0 | Provides corrosion resistance |
| Nickel (Ni) | 8.0 – 12.0 | Stabilizes austenitic structure |
| Manganese (Mn) | ≤ 2.00 | Improves strength |
| Silicon (Si) | ≤ 1.00 | Deoxidizer |
| Phosphorus (P) | ≤ 0.045 | Low for toughness |
| Sulfur (S) | ≤ 0.030 | Low for cleanliness |
| Nitrogen (N) | ≤ 0.10 | Increases strength |
304 vs 304L Comparison
| Element | 304 | 304L | Advantage of 304L |
|---|---|---|---|
| Carbon | ≤ 0.08% | ≤ 0.035% | No sensitization after welding |
| Nickel | 8.0 – 10.5% | 8.0 – 12.0% | Slightly higher Ni for stability |
| PWHT Required | Yes (solution anneal) | No | Lower fabrication cost |
Mechanical Properties
Tensile Requirements (Annealed Condition)
| Property | ASTM A554 | EN 10296-2 |
|---|---|---|
| Tensile Strength | ≥ 485 MPa | 490 – 690 MPa |
| Yield Strength (0.2%) | ≥ 170 MPa | ≥ 200 MPa |
| Elongation | ≥ 35% | ≥ 35% |
Values are minimum requirements. Actual properties may be higher depending on tube size and manufacturing process.
Physical Properties
| Property | Value |
|---|---|
| Density | 7.93 g/cm³ |
| Modulus of Elasticity | 193 GPa |
| Thermal Conductivity | 16.2 W/m·K (at 100°C) |
| Specific Heat | 500 J/kg·K |
| Electrical Resistivity | 72 µΩ·cm |
| Melting Range | 1400 – 1450°C |
Hardness
| Condition | Hardness (HB) |
|---|---|
| Annealed | ≤ 183 HB |
| As-welded | ≤ 200 HB (typical) |
Comparison: 304L vs Other Grades
| Grade | Yield (MPa) | Tensile (MPa) | Weldability | Corrosion Resistance | Cost |
|---|---|---|---|---|---|
| 304L | ≥ 170 | ≥ 485 | Excellent | Good (general) | $$ |
| 304 | ≥ 205 | ≥ 515 | Fair (PWHT needed) | Good | $$ |
| 316L | ≥ 170 | ≥ 485 | Excellent | Excellent (marine) | $$$ |
| 430 | ≥ 205 | ≥ 450 | Poor | Fair | $ |
Applications
Primary Use: Welded structures and equipment requiring corrosion resistance
Other Applications:
- Food processing equipment (conveyors, tanks, tables)
- Pharmaceutical and sanitary tubing
- Architectural handrails and balustrades
- Furniture frames (indoor and outdoor)
- Chemical storage and transport equipment
- Brewery and dairy processing lines
- Medical device frames and components
- Water treatment equipment
- Elevator trim and architectural accents
- Display racks and shelving
Quick Pick:
| Need | Choose |
|---|---|
| Welded structure (no PWHT) | 304L |
| Marine / coastal environment | 316L |
| High-temperature service (>400°C) | 304H or 321 |
| Cost-sensitive, no welding | 304 |
| Sanitary / high purity | 304L seamless (ASTM A269) |
| Architectural / decorative | 304L with brushed/polished finish |
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Company
Shanxi Zhongcheng Metal Co., Ltd.
Location
Room 2, No. 221 Tianzhang Avenue, Fengdong New City, Xi'an, Shaanxi Province
Contact Person
Zhongcheng Metal