1 1/16 Stainless Steel Round Bar 304

Product Details: 304 Stainless Steel Round Bar

​Overview

The ​304 stainless steel round bar is a versatile, corrosion-resistant alloy widely used across industries for its exceptional balance of strength, formability, and cost-efficiency. As part of the austenitic stainless steel family, it contains 18-20% chromium and 8-10.5% nickel, making it ideal for applications in food processing, architecture, automotive, and chemical industries. This guide provides a detailed analysis of its technical specifications, mechanical properties, and practical applications, optimized for SEO and user engagement.

​Technical Specifications

​In-Depth Performance Attributes

​1. Tensile Strength: Reliability Under Load

The ​304 stainless steel round bar offers a ​minimum tensile strength of 515 MPa (75,000 psi) and a yield strength of 205 MPa (30,000 psi). These properties make it suitable for:

• ​Structural Components: Bolts, shafts, and fasteners in construction and machinery.
• ​High-Temperature Applications: Exhaust systems and heat exchangers (up to 870°C intermittently).
• ​Medical and Food Equipment: Non-reactive surfaces for surgical tools and processing tanks.

Its ductility (40–50% elongation) allows for extensive machining, welding, and cold forming without compromising integrity.

​2. Bend Strength: Resistance to Deformation

With a ​minimum bend strength of 210 MPa (30,000 psi), the ​stainless steel round bar maintains shape under mechanical stress. Key applications include:

• ​Automotive Parts: Axles and suspension components requiring fatigue resistance.
• ​Architectural Hardware: Railings, brackets, and decorative elements in high-traffic areas.
• ​Marine Fixtures: Fasteners and fittings in moderately corrosive environments.

Cold-drawn bars exhibit enhanced bend strength due to strain hardening during manufacturing.

​3. Identification and Certification: Ensuring Material Authenticity

Authentic ​304 stainless steel round bars are verified through:

• ​Chemical Composition: 18–20% chromium (Cr), 8–10.5% nickel (Ni), ≤0.08% carbon (C).
• ​Certification: Mill Test Reports (MTRs) confirming compliance with ASTM A276 or EN 1.4301.
• ​Non-Destructive Testing (NDT): Ultrasonic testing for internal flaws and eddy current testing for surface defects.

For welding, ​304L (low-carbon variant) is recommended to prevent carbide precipitation.

​4. Weight Calculation: Simplifying Logistics and Costing

The weight of a ​304 stainless steel round bar is calculated using the formula:
\text{Weight (kg)} = \frac{{\text{Diameter (mm)}^2 \times \text{Length (m)} \times 0.0062}}
Example: A 40mm diameter bar measuring 4m weighs 402×4×0.0062=39.68kg.

For imperial measurements:
\text{Weight (lbs/ft)} = \frac{{\text{Diameter (in)}^2 \times 0.222}}
This formula aids in inventory management and freight cost estimation.

​5. Why Does Stainless Steel Rust? Addressing Common Concerns

While ​304 stainless steel is highly corrosion-resistant, certain conditions can lead to surface oxidation:

• ​Chloride Exposure: Coastal environments or de-icing salts may cause pitting corrosion.
  • Solution: Use ​316 stainless steel for severe chloride exposure.
• ​Galvanic Corrosion: Contact with dissimilar metals (e.g., carbon steel) in conductive fluids.
  • Solution: Use insulating materials or coatings to separate metals.
• ​High-Temperature Oxidation: Prolonged use above 870°C degrades the protective chromium oxide layer.
  • Solution: Apply heat-resistant coatings or select ​310 stainless steel.
• ​Mechanical Damage: Scratches or grinding marks expose the substrate to moisture.
  • Solution: Passivate surfaces post-machining to restore corrosion resistance.

​Advanced Manufacturing Processes

​1. Hot Rolling

Billets heated to 1200°C are shaped into round profiles, improving grain structure for enhanced toughness and uniformity.

​2. Cold Drawing

Bars are precision-drawn through carbide dies to achieve tight tolerances (±0.05mm) and smooth surfaces, ideal for CNC machining.

​3. Solution Annealing

Heated to 1050–1100°C and water-quenched to dissolve carbides, ensuring optimal corrosion resistance and mechanical properties.

​4. Surface Finishing

• ​Pickling: Removes scale using nitric-hydrofluoric acid baths.
• ​Polishing: Achieves Ra ≤0.4µm for decorative or hygienic applications.
• ​Peeling: Produces a smooth, uniform surface for high-precision components.

​Industry-Specific Applications

​Why Choose Our 304 Stainless Steel Round Bar?

(Positioned for Maximum Conversion Impact)

1. ​Certified Quality
   • Third-party tested for hardness, chemical composition, and intergranular corrosion resistance.
   • Full traceability with Mill Test Reports (MTRs) and ISO 9001:2015 certification.
2. ​Competitive 304 Stainless Steel Round Bar Price
   • Cost-effective pricing with bulk order discounts and price-match guarantees.
3. ​Customization Options
   • Tailored diameters (5mm–300mm), lengths, and finishes (polished, sandblasted, turned).
4. ​Rapid Global Delivery
   • Standard lead time of 10–15 days, with expedited shipping for urgent projects.
5. ​Technical Support
   • Free consultation on material selection, machining guidelines, and weldability.
6. ​Sustainability Commitment
   • Eco-friendly production using 70% recycled content and carbon-neutral logistics.