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1 inch Stainless Steel Square Bar 304
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Size: 1 inch
Product Type: Square Bar
Grade: 304 Stainless Steel
UOM: FT
304 Stainless Steel Square Bar – Durable & Cost-Effective Alloy for Industrial Applications
The 304 stainless steel square bar is a widely used austenitic alloy celebrated for its balance of strength, corrosion resistance, and affordability. As a leading 304 stainless steel square bar supplier, we deliver high-quality material for construction, machinery, automotive, and consumer goods sectors. This stainless steel square bar features excellent formability, weldability, and resistance to atmospheric corrosion, making it ideal for both indoor and outdoor applications.
Technical Specifications & Production Process
Table 1: Key Mechanical & Physical Properties
| Property | Specification |
|---|---|
| Standard Sizes | 1/4″ (6mm) – 6″ (150mm) |
| Tolerance | ±0.1mm (cold-drawn), ±0.5mm (hot-rolled) |
| Hardness | 80–95 HRB (Rockwell B) |
| Tensile Strength | 515 MPa (min) |
| Yield Strength | 205 MPa (min) |
| Density | 8.0 g/cm³ |
| Surface Finish | Mill finish, polished, or pickled |
Table 2: Manufacturing Processes & Applications
| Process | Description |
|---|---|
| Cold Drawn | Precision-machined for tight tolerances |
| Hot Rolled | Cost-effective for large structural sections |
| Annealed | Stress-relieved for improved weldability |
| Passivated | Enhanced Corrosion Resistance for chloride-rich environments |
In-Depth Technical Analysis
Tensile Strength & Load-Bearing Capacity
The 304 stainless steel square bar delivers 515 MPa minimum tensile strength, ensuring it withstands extreme axial forces in critical applications like:
- Construction frameworks: Beams and columns in bridges or buildings.
- Automotive components: Engine parts and chassis members.
- Heavy machinery: Shafts and bearings under high stress.
ASTM A276 testing confirms consistent performance, while 40% elongation guarantees flexibility during bending and welding operations.
Bending Strength & Structural Design
This alloy’s excellent bending strength makes it ideal for components subjected to cyclic or static loads:
- Marine handrails: Withstand constant wave forces and salt spray.
- Food conveyor systems: Flexible yet durable for high-speed operations.
- Architectural cladding: Stable under thermal expansion and contraction.
Engineers leverage its molybdenum content (2–3%) to resist chloride-induced stress corrosion cracking in harsh environments.
Identification & Quality Assurance
Each stainless steel square bar is marked with:
- Permanent heat number: Traceable to batch-specific mill test reports.
- Grade designation: “304” or “304L” (low-carbon variant for welded joints).
- Manufacturer’s logo: Ensuring authenticity and compliance.
Certifications include:
- ASTM A276/A479: Verified chemical composition and mechanical properties.
- EN 10204 3.1: Third-party inspection for European markets.
- NACE MR0175: Approved for sour gas services.
Weight Calculation Method
To determine the weight of a stainless steel square bar:
- Measure the edge width in millimeters.
- Square the width value.
- Multiply by 0.0079 (a conversion factor derived from density).
Example:
A 50mm × 50mm bar weighs:
.
Our team provides free weight calculation tools and customized quotes for bulk orders.
Why Does Stainless Steel Corrode? Causes & Solutions
Despite its corrosion resistance, 304 stainless steel may degrade under specific conditions:
1. Chloride Attack
- Cause: Prolonged exposure to saltwater (>60°C) disrupts the chromium oxide layer.
- Prevention: Use 304L for welded structures and apply periodic passivation (ASTM A967).
2. Mechanical Damage
- Cause: Scratches or grinding remove the passive layer.
- Prevention: Avoid abrasive cleaners and inspect surfaces regularly.
3. Galvanic Corrosion
- Cause: Contact with dissimilar metals (e.g., carbon steel) in electrolytes.
- Prevention: Use isolating barriers or choose non-conductive coatings.
4. High-Temperature Oxidation
- Cause: Extended exposure to temperatures above 500°C reduces chromium content.
- Prevention: Opt for 310 or 304 alloys for elevated-temperature applications.
Industry Applications
- Marine: Shipbuilding, desalination plants, and offshore platforms.
- Food & Beverage: Hygienic equipment, conveyor systems, and storage tanks.
- Construction: Stainless steel handrails, roofing sheets, and cladding.
- Medical: Surgical instruments, laboratory equipment, and implants.
Why Choose Our 304 Stainless Steel Square Bar**?**
✅ Premium Material Quality
- Molybdenum content: 2.1–2.5% for superior pitting resistance.
- Traceability: Every batch comes with a mill test certificate and chemical analysis.
✅ Precision Manufacturing
- Cold-drawn bars: Tight tolerances (±0.1mm) for CNC machining.
- Custom finishes: Available in matte, brushed, or reflective polish.
✅ Global Compliance
- Meets ISO 6931, ASTM A276, and ASME SA479 standards.
- REACH/RoHS-compliant for international markets.
✅ Logistics & Support
- 24/7 customer service: Technical guidance and urgent order processing.
- Global distribution: DDP shipping to over 50 countries.
✅ Sustainability
- Recyclable material: 100% reusable in new products.
- Eco-friendly packaging: Biodegradable materials and minimal waste.
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