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ASTM A312 TP316L Seamless Stainless Steel Pipes Supplier & Exporter in India

ASTM A312 TP316L Seamless Pipes are low carbon molybdenum-bearing stainless steel pipes designed for superior corrosion resistance and enhanced weldability in chloride environments.

Product Overview – ASTM A312 TP316L Seamless Pipes

ASTM A312 TP316L is the low carbon version of SS 316 containing 16–18% chromium, 10–14% nickel, and 2–3% molybdenum. The reduced carbon content (maximum 0.03%) minimizes carbide precipitation during welding, improving resistance to intergranular corrosion.

SS 316L seamless pipes are widely used in marine, chemical, pharmaceutical, oil & gas, and food processing industries where corrosion resistance and weldability are critical.
Seamless construction ensures high pressure performance and uniform strength.

Standard, Grade & International Equivalents-ASTM A312 TP316L Seamless Pipes

Standard ASTM A312 / ASME SA312
Grade TP316L
UNS S31603
EN 1.4404

ASTM A312 TP316L Seamless Pipe Specifications

Manufacturing Type : Seamless
Size Range : 1/8″ NB to 24″ NB
Schedules : 5S, 10S, 40S, 80S, 160, XS, XXS
Length : 6m, 12m, Custom Length
End Type : Plain End (PE), Beveled End (BE)
Testing : Hydrostatic Test, PMI, NDT
Certification : EN 10204 3.1 / 3.2 MTC
Dimensional compliance: ASME B36.19M.

All specifications are in accordance of ASTM A312 / ASME SA312 standards. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.

Chemical Composition of ASTM A312 TP316L Seamless Pipe

(As per ASTM specification)
ElementMax (%)
Carbon (C)0.03%
Manganese (Mn)2.00 %
Phosphorus (P)0.045 %
Sulfur (S)0.030 %
Silicon (Si) 1.00 %
Chromium (Cr)16.0 – 18.0 %
Nickel (Ni)10.0 – 14.0 %
Molybdenum (Mo):2.00 – 3.00%
Iron (Fe)Balance
Note: The key difference from 316 is the lower carbon content.

Mechanical Properties of ASTM A312 TP316L Seamless Pipe

PropertyMinimum Value
Tensile Strength≥ 485 MPa
Yield Strength≥ 170 MPa
Elongation≥ 35%
(Strength slightly lower than 316 due to reduced carbon.)

Corrosion Resistance & Welding Performance of ASTM A312 TP316L Seamless Pipe

SS 316L seamless pipes provide:

🔸 Excellent resistance to chloride pitting corrosion
🔸 Improved resistance to intergranular corrosion after welding
🔸 Strong performance in marine and coastal environments
🔸 Suitable for acidic and chemical processing environments

Because of low carbon, 316L is preferred in heavy welded structures and fabrication projects.

Applications of ASTM A312 TP316L Seamless Pipes

  • 🔸Offshore oil & gas pipelines
  • 🔸Chemical processing plants
  • 🔸Water treatment plants
  • 🔸Pharmaceutical industry
  • 🔸Food processing equipment
  • 🔸Heat exchangers

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Advantages of SS 316L Seamless Stainless Steel Pipes

Superior corrosion resistance Low carbon for improved weldability Reduced risk of carbide precipitation Suitable for harsh chloride environments Long service life in harsh environments

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Frequently Asked Questions

– ASTM A312 TP316L Seamless Pipes

What is ASTM A312 TP316L?
TP316L is a low carbon austenitic stainless steel seamless pipe grade with enhanced resistance to intergranular corrosion and improved weldability.
What is the difference between SS 316 and SS 316L?
SS 316L has lower carbon content (max 0.03%) compared to 316 (max 0.08%), reducing the risk of carbide precipitation during welding.
Is SS 316L better than 316 for welding?
Yes. Due to lower carbon content, SS 316L is preferred for welded structures.
Is SS 316L suitable for marine applications?
Yes. It offers excellent resistance to saltwater and chloride corrosion.
What industries use TP316L seamless pipes?
Oil & gas, marine, pharmaceutical, chemical processing, food processing, and water treatment industries.