SS 321 Foundation BoltASTM A193 · IS 5624 / project drawing · Manufacturer, stockist & exporter, India
AISI 321 · UNS S32100
An SS 321 foundation bolt is a heavy bolt set in concrete for machinery bases, made from SS 321 to ASTM A193 B8T. Foundation bolts secure heavy machinery and structures. Supplied to drawing with nuts and washers.
- ASTM A193
- IS 5624 / project drawing
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 321 Foundation Bolt?
- What it is
- A heavy bolt set in concrete for machinery bases
- Material
- ASTM A193 B8T
- Dimensions
- IS 5624 / project drawing
- Grade
- SS 321 · UNS S32100
- Best at
- High-temperature service between 425 and 815 °C
SS 321 Foundation Bolt Specification
| Product | SS 321 Foundation Bolt |
|---|---|
| Material standard | ASTM A193 B8T |
| Dimensional standard | IS 5624 / project drawing |
| Sizes | M10 – M64 · ½" – 4" (others on request) |
| Threads | UNC · UN-8 · metric coarse |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Foundation Bolt
Foundation bolts secure heavy machinery and structures. Supplied to drawing with nuts and washers.
- Heavy diameters
- Made to drawing
- With nuts and plates
More on choosing: Foundation bolt guide.
SS 321 Foundation Bolt: Why 321 for foundation bolts
Foundation bolts secure heavy machinery and structures. Supplied to drawing with nuts and washers. In SS 321, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Stainless fasteners resist atmospheric and process corrosion. SS 321 is picked for high-temperature service between 425 and 815 °C. |
|---|---|
| Typical service | Aircraft exhaust — Manifolds, bellows and exhaust systems. |
| Bolting | ASTM A193 B8T studs with A194 8T nuts |
SS 321 Foundation Bolt Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 17.0 – 19.0 |
| Nickel | 9.0 – 12.0 |
| Titanium | 5 × (C + N) min, 0.70 max |
| Carbon | 0.08 max |
| Manganese | 2.00 max |
| Silicon | 0.75 max |
| Nitrogen | 0.10 max |
| Phosphorus | 0.045 max |
SS 321 Foundation Bolt Mechanical Properties
| Annealed plate & sheet | Value |
|---|---|
| Tensile strength | 515 MPa · 75 ksi |
| Yield strength 0.2% | 205 MPa · 30 ksi |
| Elongation | 40% |
| Hardness | 217 HB max |
Full chemistry, properties and equivalents are on the SS 321 grade page.
Other SS 321 fasteners
SS 321 Foundation Bolts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 321 Foundation Bolt — questions buyers ask
Foundation bolt or anchor bolt?
The terms overlap; foundation bolts usually refer to heavy bolts for machinery bases.
What nut is used with SS 321 foundation bolts?
ASTM A194 8T heavy hex nuts.
Which standard covers SS 321 foundation bolts?
The material is ASTM A193 B8T; dimensions follow IS 5624 / project drawing. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 321 foundation bolt?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026