ASTM A312 TP321 Stainless Steel Pipe Manufacturer, Suppliers, and Exporters in India

Mcneil Instrument, a reputable 321 Stainless Steel Pipe Manufacturer, supplier and exporter in Mumbai, offers AISI 321 ERW Pipes. These pipes, also known by their trade name UNS S32100 and ASTM A312 Tp321, are titanium stabilized alloys designed to resist intergranular corrosion, particularly in high-temperature environments. Unlike conventional austenitic stainless steel grades, ASTM A312 Gr.Tp321 exhibits higher creep strength and stress rupture properties, making it suitable for temperatures ranging from 800 to 1500°F. Furthermore, the 321 Stainless Steel Pipe boasts excellent toughness properties even at lower temperatures.

The Mcneil Instrument AISI 321 ERW Pipe, with werkstoff nr. 1.4541, cannot be hardened by heat treatment. However, due to cold working, these pipes feature superior surface finish and dimensional control. Thanks to its ductility, the A312 Tp 321 can be easily formed into pipes, and it can be welded using conventional techniques. Testing procedures such as transverse or longitudinal tension tests, flattening tests, grain size determination, and weld decay tests are essential for ensuring the quality and reliability of ASTM A312 Tp 321 pipes offered by Mcneil Instrument. As a best ASTM A312 TP321 Stainless Steel Pipe Supplier and ASTM A312 TP321 Stainless Steel Pipe Exporters in India, we provide good manufactured 321 Stainless Steel Pipe to our client.  

SS 321 Pipe Size Chart

ASTM A312 TP321 Seamless Pipes

Size: 6NB – 1200NB
OD: 1/8″ – 12″ NPS
Thickness : 0.6 – 12.7 mm
Length: Single, Double Random & Cut Length

ASTM A312 TP321 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 of ASTM A312 TP321

ASTM / ASME SpecificationASTM A312 / ASTM SA 312
Dimensional StandardsANSI/ASME B36.19M, ANSI/ASME B36.10M
Different Types and ShapesHydraulic, Square, Hex, Honed, Round, Rectangle
Most Common types100% X Ray Welded, Seamless, CDW, Fabricated, ERW, Welded
Pipe End TypesPlain One End, Plain Both Ends, Bevel small end, Treaded On End, Beveled end, Bevel one end, Bevel large end, Beveled One End, Treaded Both Ends, Bevel both ends
Technical Conditions of The PipeCold Drawn, Bright Annealed, Annealed and Pickled, Polished
Mechanical Surface Finishing2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements
Wall Wall Thickness Schedule ChartSCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Other Services we provide
  • Draw & Expansion as per client’s required Size & Length
  • Polish (Electro & Commercial) Heat Treatment
  • Annealed & Pickled
  • Bending
  • Sand Blasting
  • Machining Etc.
Marking available for TP321 Pipes
  1. Specification
  2. Grade
  3. Nominal Pipe Sizes
  4. Pipe Schedule or Wall Thickness
  5. Manufacturing Method (Seamless / Welded)
  6. Heat Number
  7. Supplier/ Manufacturer’s Name or Custom Logo – on request

Marked Pipe Sample: ANSI B36.19 ASTM A312 TP321 12″ NB SCH 40S SEAMLESS HEAT NO. XXXX

Types of heat treatment methods for 321 stainless steel pipe

Mcneil Instrument offers grade 321 stainless steel pipes or AISI 321 ERW Pipes, which are austenitic steel stabilized with titanium to ensure excellent corrosion resistance. However, the presence of titanium limits its use as a welding consumable due to poor transfer over an electric arc welding procedure, imposing constraints on its application involving heat.

Mcneil Instrument provides annealing as a solution to enhance the material’s corrosion resistance. Annealing involves heating the material to 1065 degrees Celsius followed by water quenching, thereby maximizing corrosion resistance. Additionally, hot bending operations can be conducted within the range of 950 to 1100 degrees Celsius. Although hot bending doesn’t aim to improve mechanical properties, immediate annealing post-bending ensures restoration of corrosion resistance. Moreover, annealing reduces intergranular corrosion during welding and promotes the formation of an oxide layer on the surface, acting as a protective coating against oxidation reactions. Mcneil Instrument also offers various finishing options to further safeguard the surface, complementing the heat treatment process.

ASTM A312 TP321 Material in stock

SA 312 TP 321 3 Inch PipesStainless Steel UNS S32100 Dairy Pipes
A312 GR TP321 Square PipesSS UNS S32100 TP321 Erw Pipes
A312 TP 321 Seamless PipesAustenitic SS TP321 Polished Pipes
TP 321 Stainless Steel Hollow PipesASTM A 312 TP 321 Stainless Steel Schedule 80 Pipes
ASTM A312 SS 321 Rectangular PipesASTM A312 GR TP321 Schedule 10 Pipes
Austenitic Stainless Steel 321 Round PipesA312 Stainless Steel 321 Electropolished Pipes
ASTM A312 TP321 Exhaust PipesSS UNS S32100 Box Pipes
A312 TP321 Schedule 40 PipesTP 321 Stainless Steel DIN 1.4541 Water Pipes
werkstoff nr. 1.4541 Stainless Steel 321 C Class PipesSA312 321 Stainless Steel Threaded Pipes

Mechanical Specification of AISI 321 Pipe

Density8.0 g/cm3
Melting Point1454 °C (2650 °F)
Tensile StrengthPsi – 75000 , MPa – 515
Yield Strength (0.2%Offset)Psi – 30000 , MPa – 205
Elongation35 %

TP321 Stainless Steel Composition Chart

Ni9 – 12
Cr17 – 19
C0.08 max
N0.10 max
Mn2 max
Si0.75 max
S0.03 max
P0.045 max
Ti5xC min
0.60% max

ASTM A312 TP321 Equivalent material grade


Contact Mcneil Instruments Inc. today for all your stainless steel pipe needs, as we are leading manufacturer, supplier, and exporter of good quality ASTM A312 TP321 stainless steel pipes in India. Our AISI 321 ERW pipes, ASTM A312 TP321 seamless pipes, and other products are manufactured with precision and adhere to international quality standards. With a commitment to excellence, we ensure that our ASTM A312 Gr.Tp321 pipes meet the diverse requirements of various industries. Our dedication to quality, reliability, and customer satisfaction makes us a preferred choice for stainless steel pipe solutions.