Stainless Steel 347H Welded Pipe Specifications
Key SS 347H welded pipe specifications supplied by Sachiya Steel International are listed in the table below.
| Parameter | Specification |
|---|---|
| Standard | ASTM A312 / ASME SA-312, ASTM A358, ASTM A409 |
| Size / OD | 1/2” (12.7 mm) to 24” (609.6 mm) NB |
| Wall Thickness / Schedule | SCH 5S, 10S, 10, 20, 40S, 40, 60, 80S, 80, 100, 120, 140, 160, XXS |
| Length | Up to 6 metres standard; custom lengths available |
| End Type | Plain End (PE), Bevelled End (BE), Threaded |
| Finish | Mill Finish, Annealed & Pickled, Bright Annealed |
| Form | Welded (ERW, EFW) |
| Dimensional Standard | ASME B36.19 |
Stainless Steel 347H Welded Pipe Sizes
SS 347H welded pipe dimensions range from 1/2” (12.7 mm) to 24” (609.6 mm) outside diameter, wall thickness from SCH 5S through SCH XXS per ASME B36.19. Lengths include single random (3–5 m), double random (5–7 m), and cut-to-length options.
Stainless Steel 347H Welded Pipe Dimensions & Weight Chart
OD, wall thickness and weight per metre for common 347H stainless steel welded pipe sizes are listed below.
| NPS | OD (mm) | SCH 10S WT (mm) | Wt/m (kg) | SCH 40S WT (mm) | Wt/m (kg) |
|---|---|---|---|---|---|
| 1/2" | 21.3 | 2.11 | 0.99 | 2.77 | 1.27 |
| 1" | 33.4 | 2.77 | 2.09 | 3.38 | 2.50 |
| 2" | 60.3 | 2.77 | 3.93 | 3.91 | 5.44 |
| 4" | 114.3 | 3.05 | 8.37 | 6.02 | 16.07 |
| 6" | 168.3 | 3.40 | 13.84 | 7.11 | 28.26 |
| 12" | 323.9 | 4.57 | 35.98 | 10.31 | 79.73 |
Stainless Steel 347H Welded Pipe Price
Stainless Steel 347H welded pipe is priced in India between ₹350 and ₹650 per kg, with bulk orders of 1 metric ton or more attracting more competitive rates. International export pricing typically ranges from USD $5.00 to $9.00 per kg on an FOB Mumbai basis.
Final pricing depends on outer diameter, wall thickness, surface finish, order quantity and prevailing nickel and niobium market surcharges. Additional costs apply for third-party inspection, special testing, or certified mill documentation.
Stainless Steel 347H Welded Pipe Chemical Composition
The table below lists the chemical composition limits of TP347H welded pipe (UNS S34709) as specified under ASME SA-312.
Because 347H has a slightly higher minimum carbon content, its welded pipe performs better at high temperatures above 538°C (1000°F). In 347H Cb stabilised stainless steel, the carbon is tied up as stable niobium carbides, which helps stop grain boundary corrosion and cracking.
Stainless Steel 347H Welded Pipe Mechanical Properties
SA-312 TP347H welded pipe must meet the mechanical values listed below at room temperature.
TP347H welded pipe retains creep strength at sustained temperatures up to 816°C (1500°F). It’s preferred over 304 or 316L for high-temperature pressure piping.
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (min) | 515 (75) | MPa (ksi) |
| Yield Strength, 0.2% Offset (min) | 205 (30) | MPa (ksi) |
| Elongation in 50 mm (min) | 35 | % |
| Hardness, Brinell (max) | 201 | HB |
| Hardness, Rockwell B (max) | 92 | HRB |
Stainless Steel 347H Welded Pipe Equivalent Grades
The following table helps buyers source SUS 347H welded pipe and cross-reference these for international procurement. UNS S34709 welded pipe is recognised under multiple international designations, listed below.
| Country / Standard | Designation |
|---|---|
| AISI | AISI 347H |
| USA (UNS) | UNS S34709 |
| Japan (JIS) | SUS 347H |
| China (GB) | 0Cr18Ni11Nb |
Stainless Steel 347H Welded Pipe Industrial Applications
Alloy 347H welded pipe performs in 3 primary sectors. High-temperature stability and intergranular corrosion resistance make it suitable where standard austenitic grades can’t perform.
Oil & Gas and Petrochemical Industry
Petroleum refineries use Type 347H welded pipe in catalytic reformers, delayed coker units and high-temperature transfer lines. Its resistance to polythionic acid stress corrosion cracking during shutdowns drives refinery specifications.
Power Generation and Boiler Systems
TP347H welded pipe carries superheated steam in boiler tubes and main steam lines above 540°C (1004°F). Fossil-fuel and waste-to-energy plants specify this grade for its creep performance.
Chemical Processing
Heat exchangers, reactors and process piping in nitric acid and organic acid production rely on 347H for corrosion performance under thermal cycling. Niobium stabilisation prevents weld decay in heat-affected zones.
Shipping & Packaging
Heavy-duty wooden boxes Packing
We strictly follow seaworthy export handling standards to protect 347H welded pipe from transit damage, moisture ingress, and surface contamination during long-distance dispatch.
- Heavy-duty wooden boxes with moisture barrier lining
- HDPE stretch film wrapping on all bundles
- Plastic end caps on threaded and plain-end pipes
- Silica gel desiccants to minimize moisture exposure
- ISPM-15 fumigated wooden packaging for export
Pipe Bundle Yard Staging
Container End-Cap Protection
Wrapped Export-Ready Bundles
We Export Worldwide
Sachiya Steel International supplies stainless steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.
USA
Canada
Germany
UK
Italy
France
Australia
South Korea
Indonesia
Vietnam
Singapore
Malaysia
Taiwan
UAE
Saudi Arabia
Qatar
Oman
South Africa
Nigeria
Egypt