Stainless Steel 347H Seamless Pipe & ASME SA 312 TP 347H Welded Pipe manufacturer in India
ASTM A312 Gr Tp347h is an austenitic stainless steel. It has chromium and nickel content which give it the corrosion resistant properties. For extra toughness, the A312 347h material has higher carbon content. The addition of more carbon causes toughness but is also less strong than the low carbon version of the same material. But to overcome the issue, columbium is added in the A312 Tp347h material. The alloy composition makes the material resistant to most oxidizing agents. Regardless of the high carbon content, the SA 312 Tp 347h material has excellent resistance to intergranular corrosion. This makes the 347h Stainless Steel Pipe be applied in applications that operate under high temperatures with high risk of oxidization. The SS 347H Seamless Pipe material is cold drawn and therefore cannot be hardened by heat treatment. But it could be hardened by cold working. The material could also be easily welded upon.
Check dimensions of UNS S34709 Grade 347H Square Pipe, DIN 1.4961 AISI 347H ERW Pipe
Oshwin Overseas is a manufacturer and supplier of the pipes in different shapes. Our SS 347H Square Pipe are used in structural applications due to the extra strength of them. We produce 347H Welded Pipe in other shapes as well. The most common is the Grade 347H Stainless Steel Round Pipe and it is used in heat exchangers, water filtration, boat rails, aerospace applications and a variety of other applications. The AISI 347H Annealed Stainless Steel Welded Pipe is stronger and tough. We manufacture these products under international standards and test them for quality. Your inquiries are welcome.
TP347H Stainless Steel Pipe Sizes Available
TP347H Stainless Steel Seamless Pipes
- Sizes: 6NB - 1200NB
- Outside Dia.: 1/8" - 12" NPS
- Thickness : 0.6 - 12.7 mm
- Length: Single, Double Random & Cut Length
TP347H Stainless Steel Erw / Welded Pipes
- Sizes: 1/8” - 36” NB,
1/4” - 36” OD
- Outside Dia.: 6.35 - 114.3 mm
- Thickness : 0.8 - 12.7 mm
- Length: up to 26 Meters
ASTM A312 TP47H Specification Chart
ASTM / ASME Name |
ASTM A312 / ASTM SA312 |
ANSI / ASME Standard |
ANSI/ASME B36.19M, ANSI/ASME B36.10M |
Available Forms and Types |
Square, Hex, Round, Rectangle, Hydraulic, Honed |
Frequently Used |
Fabricated, 100% X Ray Welded, ERW, Seamless, CDW, Welded |
Pipe End Finish |
Beveled End, Plain End, Treaded |
Delivery Condition |
Cold Drawn, Polished, Bright Annealed, Annealed and Pickled |
Surface Coating and Finish |
2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements |
Pipe Wall Thickness |
SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
Industrial Value Added Services |
Export Packaging, Threading, Threading, Non Beveling, Customer Tagging/ Marking, Destructive, Grooving, Export Documentation, Ultrasonic Testing, Machining, Cutting, Destructive, MTR’s Available, Material testing, Color Coding, Polishing |
Marking on AISI 347H Pipes |
- Specification
- Grade
- Nominal Pipe Sizes
- Pipe Schedule or Wall Thickness
- Manufacturing Method (Seamless / Welded)
- Heat Number
- Manufacturer’s Name or Custom Logo - on request
Marked Pipe Sample: ANSI B36.19 ASTM A312 TP347H 12" NB SCH 40S SEAMLESS HEAT NO. XXXX |
Type of A312 TP347H Stainless Steel Pipe

347H Stainless Steel Seamless Pipe
Stainless Steel 347H Welded Pipes

A312 TP347H ERW Pipe
A312 Gr TP347H EFW Pipe
ASTM A312 347H Stainless Steel Pipe Price
US $1.50-$8.00/ Kg
Stainless Steel 347H Pipe for sale
ASTM A312 TP347H Exhaust Pipe |
TP 347H Stainless Steel DIN 1.4961 Electropolished Pipe |
A312 TP347H Schedule 40 Pipe |
ASTM A312 SS 347H Threaded Pipe |
SA 312 TP 347H 3 Inch Pipe |
Austenitic Stainless Steel 347H Water Pipe |
A312 GR TP347H Square Pipe Price |
SS UNS S34709 Seamless Pipe |
A312 TP 347H Round Pipe |
Stainless Steel UNS S34709 Hollow Pipe |
TP 347H Stainless Steel Box Pipe |
werkstoff nr. 1.4961 Stainless Steel 347H Schedule 80 Pipe |
SA312 347H Stainless Steel Polished Pipe |
ASTM A312 GR TP347H Schedule 10 Pipe |
ASTM A312 GR TP347H Dairy Pipe |
A312 Stainless Steel 347H Rectangular Pipe |
A312 Stainless Steel 347H Erw Pipe |
ASTM A 312 TP 347H Stainless Steel C Class Pipe |
ASTM A312 TP347H Mechanical Behaviour
SUS |
Tensile Strength minimum (MPa) |
Yield Strength 0.2% Proof minimum (MPa) |
Elongation minimum (% in 50mm) |
Hardness |
Rockwell B (HR B) maximum |
Brinell (HB) maximum |
347H |
515 |
205 |
40 |
92 |
201 |
A312 TP347H Composition Table
AISI |
Ni |
Mn |
Si |
S |
C |
Cr |
P |
Mo |
N |
TP 347H |
min. |
9.0 |
– |
– |
– |
00.04 |
17.0 |
– |
3.00 |
– |
max. |
13.0 |
2.0 |
1.00 |
00.030 |
00.10 |
19.0 |
00.045 |
4.00 |
– |
ASTM A312 TP347H Pipe Material Equivalent
MATERIAL |
UNS |
WERKSTOFF NR. |
|
USA |
GERMAN |
TP347H |
S34709 |
1.4961 |
Why 347h SS is used for Chemical Processing?
The grade 347 is specific austenitic stainless steel made for repeated intermittent exposure to temperatures above 800 degrees Celsius. These are modifications of 304 stainless steel. They are similar to the 321 grade in some mechanical properties but different in that it has columbium in the composition. The material is corrosion resistant to most corrosive media in medium to high temperatures.
This is an important aspect required at chemical processing. The material has minimum yield strength of 205MPa and the minimum tensile strength at 515MPa. This allows the material to withstand high pressure at temperatures above 850 degrees Celsius. The pipes and components also have a good elongation and high hardness. The 304 material can undergo intergranular corrosion above temperatures 850 F. The 347H has a higher carbon content and heat resistant so that it can perform in this temperature range.
The combination of the pressure containment capacities, the strength, hardness, heat resistance and corrosion resistance make it applicable for chemical processing. These properties also make the material used in other high corrosive, high heat applications such as the boiler tubes and casings, radiant super heaters, heat exchanger tubes, oil and gas refineries and aircraft exhaust stacks.
Testing requirements
- Before heat treatment, final straightening, hydrostatic testing , and inspection ASTM A312 TP347H pipe must be cut to length
- Niobium content should be minimum eight times the Carbon content and maximum 1.0%.