SS 347 Foundation BoltASTM A193 · IS 5624 / project drawing · Manufacturer, stockist & exporter, India
AISI 347 · UNS S34700
An SS 347 foundation bolt is a heavy bolt set in concrete for machinery bases, made from SS 347 to ASTM A193 B8C. 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 347 Foundation Bolt?
- What it is
- A heavy bolt set in concrete for machinery bases
- Material
- ASTM A193 B8C
- Dimensions
- IS 5624 / project drawing
- Grade
- SS 347 · UNS S34700
- Best at
- Welded high-temperature piping in refineries and power plants
SS 347 Foundation Bolt Specification
| Product | SS 347 Foundation Bolt |
|---|---|
| Material standard | ASTM A193 B8C |
| 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 347 Foundation Bolt: Why 347 for foundation bolts
Foundation bolts secure heavy machinery and structures. Supplied to drawing with nuts and washers. In SS 347, 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 347 is picked for welded high-temperature piping in refineries and power plants. |
|---|---|
| Typical service | Refinery hydroprocessing — Reactor effluent piping and exchangers. |
| Bolting | ASTM A193 B8C studs with A194 8C nuts |
SS 347 Foundation Bolt Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 17.0 – 19.0 |
| Nickel | 9.0 – 13.0 |
| Niobium | 10 × C min, 1.00 max |
| Carbon | 0.08 max |
| Manganese | 2.00 max |
| Silicon | 0.75 max |
| Phosphorus | 0.045 max |
| Sulphur | 0.030 max |
SS 347 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 | 201 HB max |
Full chemistry, properties and equivalents are on the SS 347 grade page.
Other SS 347 fasteners
SS 347 Foundation Bolts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 347 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 347 foundation bolts?
ASTM A194 8C heavy hex nuts.
Which standard covers SS 347 foundation bolts?
The material is ASTM A193 B8C; 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 347 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