SS 347 CrossASTM A403 · ASME B16.9 · Manufacturer, stockist & exporter, India
AISI 347 · UNS S34700
An SS 347 cross is a four-way fitting with branches at 90°, made from SS 347 to ASTM A403 WP347 (buttweld) · ASTM A182 F347 (forged). Crosses join four pipes in one fitting. They are used less than tees because of stress concentration, but save space in fire-water and utility systems.
- ASTM A403
- ASME B16.9
- 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 Cross?
- What it is
- A four-way fitting with branches at 90°
- Material
- ASTM A403 WP347 (buttweld) · ASTM A182 F347 (forged)
- Dimensions
- ASME B16.9 · B16.11
- Grade
- SS 347 · UNS S34700
- Best at
- Welded high-temperature piping in refineries and power plants
SS 347 Cross Specification
| Product | SS 347 Cross |
|---|---|
| Material standard | ASTM A403 WP347 (buttweld) · ASTM A182 F347 (forged) |
| Dimensional standard | ASME B16.9 · B16.11 |
| Sizes | Buttweld ½" – 48" · forged ⅛" – 4" |
| Wall / class | Schedule to match pipe · Class 3000 / 6000 (forged) |
| Ends | Bevelled to ASME B16.25 |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Cross
Crosses join four pipes in one fitting. They are used less than tees because of stress concentration, but save space in fire-water and utility systems.
- Equal and reducing
- Buttweld and forged
- Less common than tees
SS 347 Cross 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 Cross 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 pipe fittings
SS 347 Cross — questions buyers ask
Why are crosses less common than tees?
They concentrate stress at four junctions; most designers use two tees unless space is critical.
Which standard covers SS 347 crosss?
The material is ASTM A403 WP347 (buttweld) · ASTM A182 F347 (forged); dimensions follow ASME B16.9 · B16.11. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 347 cross?
The alloy price, the size and schedule or class, 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