Type 304 Beams
About Type 304 Beams
304 stainless steel beams provide excellent corrosion resistance and weldability, with a tensile strength of 73,200 PSI. Conforms to ASTM A276 for demanding structural applications.
Quick Facts
- Material: 304/304L Stainless Steel
- ASTM Standard: A276
- Available Sizes: Available in standard mill sizes.
- Location: Los Angeles warehouse
- Services: Custom size, same-day pickup
Overview
Type 304 stainless steel is an austenitic alloy containing 18% chromium and 8% nickel, making it one of the most widely used stainless grades. This composition provides an excellent combination of strength, formability, and resistance to atmospheric and chemical corrosion. As a structural beam, it offers robust load-bearing capabilities in environments where carbon steel would degrade, making it a long-lasting material for frames, supports, and architectural elements.
Beams in 304 stainless are typically supplied in a hot-rolled, annealed, and pickled condition. The material's inherent durability makes it suitable for both functional and aesthetic applications, from industrial equipment mounts in sanitary environments to exposed structural components in modern architecture. Its excellent weldability allows for easy fabrication into complex assemblies, while its hygienic properties make it a standard in food processing and pharmaceutical industries.
Technical Specifications
Mechanical Properties
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 73,200 | PSI |
| Yield Strength | 31,200 | PSI |
| Elongation | 70 | % |
| Hardness | 123 | HB |
Applicable Standards
- ASTM A276: Standard Specification for Stainless Steel Bars and Shapes
Common Applications
- Food & Beverage: Equipment frames and conveyor supports - Resists corrosion from cleaning agents and organic acids.
- Architectural: Exposed structural elements, canopies, and column covers - Provides a modern aesthetic and long-term durability.
- Chemical Processing: Tank supports, pipe racks, and platforms - Withstands exposure to a wide range of corrosive chemicals.
- Wastewater Treatment: Walkway supports and equipment mounts - Resists corrosion in damp, chemically-treated environments.
- Pharmaceutical: Framing for cleanrooms and equipment stands - Offers a non-porous, easy-to-sanitize surface.
- Construction: Lintels and support beams in coastal or industrial areas - Provides superior longevity over carbon steel.
Working with Type 304 Beams
Machining
Type 304 stainless steel can be challenging to machine due to its tendency to work-harden. Use slow speeds, heavy and constant feeds, sharp tooling, and a proper lubricant to achieve the best results. Chip breakers are recommended to manage the tough, stringy chips produced.
Welding
304 stainless steel exhibits excellent weldability using common fusion and resistance techniques. For optimal results, use AWS E/ER 308 or 308L filler metals. Post-weld annealing is not required for most structural applications, especially when using the low-carbon (304L) variant which minimizes carbide precipitation.
Finishing
Beams are typically supplied with a standard hot-rolled annealed and pickled (HRAP) finish. For architectural applications, the surface can be mechanically polished to various finishes, including a brushed #4 or a reflective #8 mirror finish.
Related Products
Frequently Asked Questions
Q: What is the difference between 304 and 304L stainless steel?
A: 304L has a lower carbon content (0.03% max) than standard 304 (0.08% max). This lower carbon level minimizes carbide precipitation during welding, preventing intergranular corrosion. Most beams are dual-certified as 304/304L to meet both standards.
Q: Is a 304 stainless steel beam magnetic?
A: In its annealed, as-delivered condition, Type 304 stainless steel is non-magnetic. However, it can become slightly magnetic after being cold worked (bent, formed, or heavily machined). For structural beam applications, it is considered non-magnetic.
Q: When should I choose a 316 stainless beam instead of a 304?
A: Use a 316 stainless steel beam when the application involves direct saltwater exposure, de-icing salts, or harsh chemicals like chlorides and sulfuric acids. The addition of molybdenum in 316 provides superior resistance to pitting and crevice corrosion.
Stock & Custom Sizes
Available in standard mill sizes. Custom size available.
Same-day cutting and Los Angeles pickup available.
View Sizes & PricingNeed Type 304 Beams? Contact Bobco Metals for availability and Los Angeles pickup.
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