SS 347 Hex BoltASTM A193 · ASME B18.2.1 · Manufacturer, stockist & exporter, India
AISI 347 · UNS S34700
An SS 347 hex bolt is a bolt with a hexagonal head, made from SS 347 to ASTM A193 B8C. Hex bolts join flanges, structures and equipment where one side is accessible for the head. Dimensions to ASME B18.2.1 or DIN 931 / 933.
- ASTM A193
- ASME B18.2.1
- 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 Hex Bolt?
- What it is
- A bolt with a hexagonal head
- Material
- ASTM A193 B8C
- Dimensions
- ASME B18.2.1 · DIN 931 / 933
- Grade
- SS 347 · UNS S34700
- Best at
- Welded high-temperature piping in refineries and power plants
SS 347 Hex Bolt Specification
| Product | SS 347 Hex Bolt |
|---|---|
| Material standard | ASTM A193 B8C |
| Dimensional standard | ASME B18.2.1 · DIN 931 / 933 |
| 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 Hex Bolt
Hex bolts join flanges, structures and equipment where one side is accessible for the head. Dimensions to ASME B18.2.1 or DIN 931 / 933.
- Partially or fully threaded
- ASME B18.2.1 / DIN 931 / DIN 933
- Supplied with nuts and washers
SS 347 Hex 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 Hex 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 Hex Bolt — questions buyers ask
DIN 931 or DIN 933?
DIN 931 bolts are partly threaded; DIN 933 are fully threaded.
Which standard covers SS 347 hex bolts?
The material is ASTM A193 B8C; dimensions follow ASME B18.2.1 · DIN 931 / 933. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 347 hex 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