Type 304 All Threads
About Type 304 All Threads
Type 304 stainless steel all thread rod offers excellent corrosion resistance and a tensile strength of 73,200 PSI. Conforming to ASTM A276, it is ideal for fabricating anchor bolts, hangers, and bracing. Custom cutting is available.
Quick Facts
- Material: 304 Stainless Steel
- ASTM Standard: A276
- Available Sizes: Available in standard diameters and lengths
- Location: Los Angeles warehouse
- Services: Custom size, same-day pickup
Overview
Type 304 all thread is a fully threaded rod made from one of the most versatile austenitic stainless steel alloys. Its composition, primarily 18% chromium and 8% nickel, provides exceptional resistance to atmospheric corrosion, chemicals, and oxidation. This non-magnetic grade is valued for its combination of strength, ductility, and fabrication characteristics. Its reliability in various environments makes it a standard material for fastening and support applications where durability is required.
The continuous threading along its entire length allows for versatile use in tensioning systems, custom-length bolts, and anchoring assemblies. It can be easily cut to size and used with standard nuts and washers. While the 303 grade offers better machinability, 304 provides superior corrosion resistance and weldability. For welded assemblies, the low-carbon 304L variant is recommended to prevent carbide precipitation at the weld boundaries, ensuring maximum corrosion protection in the heat-affected zone.
Technical Specifications
Mechanical Properties
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 73,200 | PSI |
| Yield Strength | 31,200 | PSI |
| Elongation | 70 | % |
| Hardness | 123 | HB |
Chemical Composition
| Element | Percentage |
|---|---|
| Chromium (Cr) | 18.0 - 20.0% |
| Nickel (Ni) | 8.0 - 10.5% |
| Carbon (C) | 0.08% max |
| Manganese (Mn) | 2.0% max |
| Silicon (Si) | 0.75% max |
| Phosphorus (P) | 0.045% max |
| Sulfur (S) | 0.03% max |
| Iron (Fe) | Balance |
Applicable Standards
- ASTM A276: Standard Specification for Stainless Steel Bars and Shapes
Common Applications
- Construction: Anchor bolts for securing structural steel or equipment to concrete foundations.
- HVAC & Plumbing: Hanger rods for suspending pipe, ductwork, and cable trays.
- Marine: Fasteners and bracing in environments exposed to freshwater and mild saltwater.
- Food Processing: Equipment assembly and mounting where sanitation and corrosion resistance are critical.
- Manufacturing: Jigs, fixtures, and long clamping bolts for machinery.
- Architectural: Mounting for facades, canopies, and railings.
- Chemical Processing: Support structures for tanks and piping in moderately corrosive environments.
- Automotive: Custom-length studs for exhaust systems and engine components.
Working with Type 304 All Threads
Machining
304 stainless is tougher to machine than carbon steel due to its high work-hardening rate. Use sharp tooling, slow speeds, and heavy, constant feeds. A sulfurized cutting fluid is recommended to reduce friction and heat buildup. Chip control is important to prevent tangling.
Welding
Type 304 has excellent weldability using common fusion and resistance methods. Post-weld annealing is not required to restore corrosion resistance. For thicker sections, use the 304L grade to prevent chromium carbide precipitation and subsequent intergranular corrosion at the weld joint.
Finishing
All thread rod typically has a plain mill finish. The material can be polished for aesthetic applications. Passivation is recommended after fabrication to remove free iron and maximize the natural corrosion resistance of the chromium oxide layer.
Related Products
Frequently Asked Questions
Q: What is the difference between 304 and 316 stainless all thread?
A: 304 is the standard grade with excellent general corrosion resistance. 316 contains molybdenum, which provides superior resistance to chlorides (like saltwater) and pitting corrosion, making it better for marine and harsh chemical environments.
Q: Can I use 304 all thread for outdoor structural support?
A: Yes, 304 stainless steel is well-suited for outdoor applications due to its resistance to atmospheric corrosion. It is commonly used for hangers, bracing, and anchor bolts in non-marine outdoor settings.
Q: Should I use 304 or 303 all thread for my project?
A: Choose 304 for general-purpose fastening and when corrosion resistance is the primary concern. Choose 303 only if the part requires extensive secondary machining, as its added sulfur improves machinability but slightly reduces corrosion resistance and makes it unsuitable for welding.
Stock & Custom Sizes
Available in standard diameters. Standard lengths: 12 ft. Custom size available.
Same-day cutting and Los Angeles pickup available.
View Sizes & PricingNeed Type 304 All Threads? Contact Bobco Metals for availability and Los Angeles pickup.
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