ASME SA312 347 ERW Pipe and Stainless Steel 347 Seamless Pipe manufacturer in India
ASTM A312 Gr Tp347 is an austenitic stainless steel stabilized with columbium. The addition of columbium makes it perform under high oxidation condition under high temperatures at around 800 degrees Celsius. The A312 Tp347 is stronger and durable. There are different sizes of the pipes in the SA 312 Tp 347 grade that range from 1/2inches to 24 inches. They could be manufactured in seamless, electric resistant weld or in electrical fusion weld conditions. The electric fusion welded pipes could range from 6 inches to 100 inches. Oshwin Overseas is a leading manufacturer of 347 Stainless Steel Pipe products. We produce all kinds of pipes in this material grade in different dimensions.
Check equivalent of DIN 1.4550 SS 347 Welded Pipe, Find best price of UNS S34700 347 Stainless Steel Pipe in Mumbai, India
Our SS 347 Seamless Pipe is used under high temperatures because it has good creep strength at higher temperatures. The mechanical properties along with the chemical composition of the material make it applicable along a wide range of applications. The use of the 347 SS Pipe is seen mostly in marine environment, boats, marine architecture, equipment and laboratory furniture and in aerospace industries as well. The SS 347 Erw Pipe is electric resistant welded and therefore it is good for heavily welded applications. Our SS 347 Welded Pipe products are stronger and can come in different shapes. The Stainless Steel 347 Round Pipe is the most common in this material grade but we also manufacture square and rectangular pipes as well. We can also take custom orders to produce specific products. Please contact us for further details.
Stainless Steel 347 Pipe Size Chart in mm
ASTM A312 TP347 Seamless Pipes
- Size: 6NB - 1200NB
- OD: 1/8" - 12" NPS
- Thickness : 0.6 - 12.7 mm
- Length: Single, Double Random & Cut Length
ASTM A312 TP347 Erw / Welded Pipes
- Size: 1/8” - 36” NB,
1/4” - 36” OD
- OD: 6.35 - 114.3 mm
- Thickness : 0.8 - 12.7 mm
- Length: up to 26 Meters
Specification Chart of ASTM A312 TP347
Specification as per American standard |
ASTM A312 / ASTM SA312 |
ANSI Standard |
ANSI/ASME B36.19M, ANSI/ASME B36.10M |
Shapes and Types |
Hydraulic, Rectangle, Honed, Square, Hex, Round |
Available Shapes and Types |
ERW, Fabricated, 100% X Ray Welded, CDW, Seamless, Welded |
Pipe End Finishing |
Bevel one end, Bevel large end, Plain One End, Bevel small end, Treaded Both Ends, Beveled end, Plain Both Ends, Bevel both ends, Treaded On End, Beveled One End |
Types of Delivery Conditions |
Annealed and Pickled, Bright Annealed, Polished, Cold Drawn |
Surface Condition |
2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements |
Pipe Wall Thickness Chart |
SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
Services for oil gas pipelines |
Machining, Export Documentation, Non MTR’s Available, Material testing, Color Coding, Destructive, Beveling, Destructive, Customer Tagging/ Marking, Grooving, Ultrasonic Testing, Polishing, Export Packaging, Cutting, Threading, Threading |
Marking we do on SS 347 Pipe |
- Specification
- Material Grade
- Nominal Pipe Sizes (NPS)
- Pipe Schedule or Wall Thickness
- Manufacturing Method (Seamless / Welded)
- Heat Number
- Manufacturer’s Name or Custom Logo - on request
Marked Pipe example: ANSI B36.19 ASTM A312 TP347 12" NB SCH 40S SEAMLESS HEAT NO. XXXX |
Type of 347 Stainless Steel Pipe

SS 347 Seamless Pipe
Stainless Steel 347 Welded Pipes

ASTM A312 TP347 ERW Pipe
A312 SS 347 EFW Pipe
ASTM A312 TP 347 Stainless Steel Pipe Price
US $1.50 - US $6.00 /per kg
A312 TP347 Material ready stock
Austenitic Stainless Steel 347 C Class Pipe |
TP 347 Stainless Steel Schedule 80 Pipe |
SS UNS S34700 Dairy Pipe |
ASTM A 312 TP 347 Stainless Steel Schedule 10 Pipe |
ASTM A312 TP347 Erw Pipe |
ASTM A312 TP347 Electropolished Pipe |
TP 347 Stainless Steel DIN 1.4550 Square Pipe Price |
A312 TP347 Threaded Pipe |
A312 GR TP347 Seamless Pipe |
ASTM A312 GR TP347 Exhaust Pipe |
A312 TP 347 Hollow Pipe |
A312 Stainless Steel 347 Schedule 40 Pipe |
A312 TP347 Polished Pipe |
SA312 347 Stainless Steel 3 Inch Pipe |
SA 312 TP 347 Water Pipe |
Werkstoff nr. 1.4550 Stainless Steel 347 Rectangular Pipe |
Stainless Steel UNS S34700 Round Pipe |
ASTM A312 SS 347 Box Pipe |
ASTM A312 SS 347 Pipe Mechanical Characteristics
AISI |
Tensile Strength minimum (MPa) |
Yield Strength 0.2% Proof minimum (MPa) |
Elongation minimum (% in 50mm) |
Hardness |
Rockwell B (HR B) maximum |
Brinell (HB) maximum |
347 |
515 |
205 |
40 |
95 |
201 |
A312 TP347 Composition Analysis
ASTM A312 |
Mn |
Si |
C |
Ni |
P |
S |
Cr |
Mo |
N |
TP347 |
min. |
- |
- |
- |
9.0 |
- |
- |
17.0 |
2.00 |
- |
max. |
2.0 |
1.00 |
0.08 |
13.0 |
0.045 |
0.030 |
20.0 |
3.00 |
- |
Equivalent of SA 312 TP 347 Pipe
GRADE |
UNS |
WERKSTOFF NR. |
JIS |
AFNOR |
BS |
GOST |
EN |
SS |
|
USA |
GERMAN |
JAPAN |
RUSSIAN |
BRITISH |
RUSSIAN |
EUROPE |
SWEDISH |
ASTM A312 347 |
S34700 |
1.4550 |
- |
- |
- |
- |
X6CrNiNb18-10 |
- |
Cost difference between 347 and 347h stainless steel?
The 347 stainless steel is austenitic chromium nickel stainless steel that is stabilized with columbium and tantalum. The major difference between the 347 and the 347H is the carbon content. So there is not much difference in the cost of the material. If there is cost difference, it is due to the lower use cases of the 347h that the manufacturers don’t have to produce much of the material in the same volume as the 347 material.
Both are corrosion resistant, heat resistant and have high tensile strength and yield strength. Both materials can be used in chemical processing plants, boilers, super heater elements and in other high temperature services. In these applications, there are some instances where the hardness and toughness of the material needs to be higher.
The 347h is used exactly for that. The manufacturing cost per unit decreases with the volume of production. The transportation, storage and other service costs also go down with the volume of production. The 347 is produced in high quantities than the 347h because the 347 is the most used. It is due to these reasons, the 347h cost might be slightly more than that of 347.
Check Raw material specification for seamless
- Niobium content should be minimum ten times the Carbon content and maximum 1.0%.
- Mandrell Mill Process is popular to manufacture smaller sizes of ASTM A312 TP347 seamless pipe