Stainless Steel

Stainless Steel 316 Pipe

Marine-Grade Molybdenum-Bearing Austenitic Stainless Steel Seamless, Welded & ERW Pipes and Heat Exchanger Tubes

Grade SS 316 / TP316 (UNS S31600, Werkstoff 1.4401, X5CrNiMo17-12-2, SUS 316, 304S11/316S31, GOST 03Ch17N14M3)
Standard ASTM A312, ASME SA312, ASTM A213, ASME SA213, ASTM A269, ASME SA269, ASTM A249, ASTM A358, ASTM A376, ASTM A409, ASTM A813, ASTM A814, ASTM A554, ASME B36.19M, ASME B36.10M, EN 10216-5, DIN 17456 / 17458
Stock Available
Home › Raw Material › Stainless Steel › Stainless Steel 316 Pipe

Product Overview

Om Export India Pvt Ltd is an internationally recognized manufacturer, stockist, and global exporter of high-performance Stainless Steel 316 Pipes and Tubes (ASTM A312 TP316 / UNS S31600 / Werkstoff 1.4401). Grade 316 is the benchmark molybdenum-bearing austenitic stainless steel, containing 16.0% to 18.0% Chromium, 10.0% to 14.0% Nickel, and 2.0% to 3.0% Molybdenum. The addition of molybdenum significantly enhances pitting and crevice corrosion resistance in aggressive chloride, bromide, and marine environments compared to standard 304-series steels.

Widely designated as marine-grade stainless steel, our 316 seamless and welded piping systems are manufactured strictly in compliance with ASTM A312, ASTM A213, ASTM A269, and ASME Section II standards. Operating with a density of 8.00 g/cm³ and a melting point of 1400°C (2500°F), SS 316 delivers superior creep strength, high rupture toughness, and exceptional fatigue performance under elevated temperatures up to 870°C (1600°F). These pipes and tubes serve mission-critical applications across marine seawater cooling, offshore oil and gas production, chemical reactors, pulp and paper bleach plants, and pharmaceutical distillation systems.

  • Molybdenum-Enhanced Chloride Resistance: 2.0%–3.0% Mo formulation protects against pitting and crevice corrosion in seawater and acidic chloride process streams.
  • Elevated Thermal & Creep Strength: Delivers superior short-term and creep-rupture tensile performance at elevated temperatures compared to 18-8 alloy systems.
  • Broad Fabrication & Finish Range: Precision-manufactured in cold-drawn seamless, ERW, and EFW formats with surface options including Pickled & Passivated, Bright Annealed (BA), and 600 Grit Mirror finishes.

Key Features

  • Chloride Pitting & Crevice Resistance: 2%–3% Molybdenum addition provides superior pitting resistance in saline, marine, and acidic chloride media.
  • Elevated Temperature Strength: Higher allowable stresses and creep-rupture performance up to 870°C (1600°F) compared to molybdenum-free austenitic grades.
  • Non-Magnetic Austenitic Matrix: Retains non-magnetic properties in the solution-annealed condition with high cryogenic impact toughness down to -196°C.
  • High Dimensional Precision: Strict dimensional tolerances compliant with ASTM A530 and ASME B36.19M specifications.
  • Excellent Weldability: Readily weldable using GTAW, GMAW, and SMAW using matching AWS ER316 or E316 welding consumables.
  • Versatile Architectural & Sanitary Finishes: Available in bright annealed, electropolished, satin, and 600 Grit mirror finishes with protective peelable PVC film.

Product Specifications

Specification Parameter Standard Specification / Technical Value
Nominal Size Range (Seamless) 1/8" NB to 24" NB (Outer Diameter: 6.00 mm to 609.6 mm OD)
Nominal Size Range (Welded / ERW / EFW) 1/8" NB to 100" NB (Outer Diameter: 6.00 mm to 2540.0 mm OD)
Wall Thickness & Schedules 0.30 mm to 50.0 mm (SCH 5S, SCH 10S, SCH 40S/STD, SCH 80S/XS, SCH 120, SCH 160, SCH XXS)
Governing Standards ASTM A312 / ASME SA312, ASTM A213, ASTM A269, ASTM A249, ASTM A358, ASTM A376, ASTM A554
Manufacturing Methods Cold Drawn Seamless (CDS), Hot Finished Seamless, High-Frequency Induction ERW, Plasma/TIG Welded, LSAW
Heat Treatment & Delivery State Solution Annealed at 1040°C – 1150°C followed by rapid quenching; Bright Annealed (BA)
Standard Lengths Single Random Length (SRL), Double Random Length (DRL), Custom Cut Lengths up to 26,000 mm (26m)
End Configurations & Protection Plain Square Cut End (PE), Beveled End (BE 30°/37.5° per ASME B16.25), Threaded Ends with Plastic End Caps

Dimensions & Sizes

Nominal Pipe Size (NPS) Outside Diameter (OD mm / in.) Wall Thickness (WT mm / in.) Nominal Schedule Nominal Weight (kg/m) Nominal Weight (lb/ft)
1/2" NB 21.34 mm (0.840") 1.65 mm (0.065") SCH 10S 0.81 kg/m 0.54 lb/ft
1/2" NB 21.34 mm (0.840") 2.77 mm (0.109") SCH 40S / STD 1.29 kg/m 0.85 lb/ft
1/2" NB 21.34 mm (0.840") 3.73 mm (0.147") SCH 80S / XS 1.65 kg/m 1.09 lb/ft
3/4" NB 26.67 mm (1.050") 1.65 mm (0.065") SCH 10S 1.03 kg/m 0.69 lb/ft
3/4" NB 26.67 mm (1.050") 2.87 mm (0.113") SCH 40S / STD 1.71 kg/m 1.13 lb/ft
3/4" NB 26.67 mm (1.050") 3.91 mm (0.154") SCH 80S / XS 2.23 kg/m 1.48 lb/ft
1" NB 33.40 mm (1.315") 1.65 mm (0.065") SCH 5S 1.31 kg/m 0.88 lb/ft
1" NB 33.40 mm (1.315") 2.77 mm (0.109") SCH 10S 2.13 kg/m 1.43 lb/ft
1" NB 33.40 mm (1.315") 3.38 mm (0.133") SCH 40S / STD 2.54 kg/m 1.68 lb/ft
1" NB 33.40 mm (1.315") 4.55 mm (0.179") SCH 80S / XS 3.29 kg/m 2.17 lb/ft
1-1/4" NB 42.16 mm (1.660") 2.77 mm (0.109") SCH 10S 2.73 kg/m 1.83 lb/ft
1-1/4" NB 42.16 mm (1.660") 3.56 mm (0.140") SCH 40S / STD 3.44 kg/m 2.31 lb/ft
1-1/2" NB 48.26 mm (1.900") 2.77 mm (0.109") SCH 10S 3.16 kg/m 2.12 lb/ft
1-1/2" NB 48.26 mm (1.900") 3.68 mm (0.145") SCH 40S / STD 4.11 kg/m 2.72 lb/ft
1-1/2" NB 48.26 mm (1.900") 5.08 mm (0.200") SCH 80S / XS 5.49 kg/m 3.63 lb/ft
2" NB 60.33 mm (2.375") 2.77 mm (0.109") SCH 10S 3.99 kg/m 2.64 lb/ft
2" NB 60.33 mm (2.375") 3.91 mm (0.154") SCH 40S / STD 5.52 kg/m 3.66 lb/ft
2" NB 60.33 mm (2.375") 5.54 mm (0.218") SCH 80S / XS 7.60 kg/m 5.03 lb/ft
2-1/2" NB 73.03 mm (2.875") 3.05 mm (0.120") SCH 10S 5.35 kg/m 3.59 lb/ft
2-1/2" NB 73.03 mm (2.875") 5.16 mm (0.203") SCH 40S / STD 8.77 kg/m 5.89 lb/ft
3" NB 88.90 mm (3.500") 3.05 mm (0.120") SCH 10S 6.56 kg/m 4.34 lb/ft
3" NB 88.90 mm (3.500") 5.49 mm (0.216") SCH 40S / STD 11.47 kg/m 7.58 lb/ft
3" NB 88.90 mm (3.500") 7.62 mm (0.300") SCH 80S / XS 15.51 kg/m 10.26 lb/ft
4" NB 114.30 mm (4.500") 3.05 mm (0.120") SCH 10S 8.50 kg/m 5.62 lb/ft
4" NB 114.30 mm (4.500") 6.02 mm (0.237") SCH 40S / STD 16.32 kg/m 10.80 lb/ft
4" NB 114.30 mm (4.500") 8.56 mm (0.337") SCH 80S / XS 22.67 kg/m 15.00 lb/ft
6" NB 168.28 mm (6.625") 3.40 mm (0.134") SCH 10S 14.04 kg/m 9.30 lb/ft
6" NB 168.28 mm (6.625") 7.11 mm (0.280") SCH 40S / STD 28.69 kg/m 18.99 lb/ft
6" NB 168.28 mm (6.625") 10.97 mm (0.432") SCH 80S / XS 43.21 kg/m 28.60 lb/ft
8" NB 219.08 mm (8.625") 3.76 mm (0.148") SCH 10S 20.27 kg/m 13.62 lb/ft
8" NB 219.08 mm (8.625") 8.18 mm (0.322") SCH 40S / STD 43.20 kg/m 28.55 lb/ft
8" NB 219.08 mm (8.625") 12.70 mm (0.500") SCH 80S / XS 65.63 kg/m 43.39 lb/ft

Chemical Composition

Element ASTM A312 TP316 (%) UNS S31600 (%) DIN 1.4401 / X5CrNiMo17-12-2 (%)
Carbon (C, Max) 0.08 0.08 0.07
Chromium (Cr) 16.00 – 18.00 16.00 – 18.00 16.50 – 18.50
Nickel (Ni) 10.00 – 14.00 10.00 – 14.00 10.00 – 13.00
Molybdenum (Mo) 2.00 – 3.00 2.00 – 3.00 2.00 – 2.50
Manganese (Mn, Max) 2.00 2.00 2.00
Silicon (Si, Max) 0.75 (1.00 Max) 0.75 1.00
Phosphorus (P, Max) 0.045 0.045 0.045
Sulfur (S, Max) 0.030 0.030 0.015
Nitrogen (N, Max) 0.10 0.10 0.10
Iron (Fe) Balance Balance Balance

Mechanical Properties

Mechanical Property ASTM A312 TP316 Specified Limits Typical Production Values
Tensile Strength, Ultimate (Min) 515 MPa (75 ksi / 75,000 psi) 560 – 620 MPa
Yield Strength (0.2% Proof, Min) 205 MPa (30 ksi / 30,000 psi) 240 – 290 MPa
Elongation in 2 in. / 50 mm (Min) 35% – 40% Min 45% – 55%
Hardness (Rockwell B / Brinell, Max) 95 HRB Max / 217 HBW Max 82 – 88 HRB (155 – 185 HBW)
Density & Melting Point Density: 8.00 g/cm³ (8000 kg/m³) Melting Point: 1400°C (2500°F)
Modulus of Elasticity 193 GPa (28 x 10⁶ psi) Poisson's Ratio: 0.28 – 0.30
Thermal Expansion (0–100°C / 0–538°C) 15.9 µm/m·°C (0–100°C) 17.5 µm/m·°C (0–538°C)
Thermal Conductivity & Resistivity 16.3 W/m·K at 100°C Electrical Resistivity: 740 nΩ·m

Standards & Specifications

Standard Designation Governing Organization Scope & Product Description
ASTM A312 / ASME SA312 ASTM / ASME Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes (TP316 / UNS S31600)
ASTM A213 / ASME SA213 ASTM / ASME Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes (TP316)
ASTM A269 / ASME SA269 ASTM / ASME Seamless and Welded Austenitic Stainless Steel Tubing for General Marine & Corrosive Service
ASTM A249 / ASME SA249 ASTM / ASME Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
ASTM A358 / ASME SA358 ASTM / ASME Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service
ASTM A376 / ASME SA376 ASTM / ASME Seamless Austenitic Steel Pipe for High-Temperature Central-Station Power Service
ASTM A409 / ASME SA409 ASTM / ASME Welded Large Diameter Austenitic Light-Wall Steel Pipe for Corrosive or High-Temperature Service
EN 10216-5 / DIN 17456 / 17458 European / German Standards Seamless Steel Tubes for Pressure Purposes (Grade 1.4401 / X5CrNiMo17-12-2)
Indian Boiler Regulations (IBR) Central Boilers Board IBR Certified Steam and High-Pressure Stainless Steel Boiler Piping

Applications

Stainless Steel 316 marine-grade pipes and tubes are utilized across severe chloride, chemical, and elevated-temperature process systems:

  • Marine & Offshore Engineering: Seawater piping systems, reverse osmosis desalination headers, ballast systems, platform splash zone piping, and boat deck handrails.
  • Chemical & Petrochemical Processing: Reactor piping, acetic acid and phosphoric acid production lines, organic solvent distillation systems, and heat exchanger tube bundles.
  • Oil & Gas Refining: Sour gas handling headers, catalytic reformer cooling loops, sulfur recovery lines, and subsea hydraulic instrumentation lines.
  • Pharmaceutical & Food Manufacturing: Sanitary fluid delivery, sterile storage tanks, CIP (Clean-In-Place) wash loops, and active pharmaceutical ingredient synthesis columns.
  • Pulp, Paper & Textile Industries: Digester liquor transfer lines, chlorine dioxide bleaching stage piping, and dye vat heat exchangers.
  • Power Generation & Environmental Systems: Surface condensers, flue gas desulfurization (FGD) scrubbers, and boiler water preheating loops.

Frequently Asked Questions

Q1: Why is Stainless Steel 316 classified as “Marine Grade” stainless steel?
Stainless Steel 316 contains 2.0% to 3.0% Molybdenum, which drastically increases its Pitting Resistance Equivalent Number (PREN) compared to 304. This enables it to resist pitting and crevice corrosion caused by sodium chloride in ocean spray, brackish water, and marine atmospheres.

Q2: What is the main operational difference between SS 316 and SS 316L?
SS 316 has a higher allowable carbon limit (≤0.08%), which provides slightly higher creep and tensile strength at elevated operating temperatures. SS 316L restricts carbon to ≤0.030% to prevent chromium carbide precipitation during welding, making 316L preferred for heavy-gauge welded assemblies that cannot undergo post-weld annealing.

Q3: What are the pressure capabilities of ASTM A312 TP316 Schedule 40 and 80 pipes?
ASTM A312 TP316 Schedule 40 pipes provide cold working pressure ratings up to 3048 psig (for 1″ size) and 1902 psig (for 2″ size) at 100°F. For higher pressure service, Schedule 80 and 160 configurations are utilized, designed in accordance with ASME B31.3 process piping allowable stresses.

Q4: What certifications and NDT tests accompany Om Export India Pvt Ltd SS 316 shipments?
Every consignment includes EN 10204 Type 3.1 / 3.2 Material Test Certificates, IBR Form III-D / III-A statutory documents, 100% Positive Material Identification (PMI) spectro analysis, 100% hydrostatic testing, and automated Eddy Current / Ultrasonic testing reports.

Related Products

Stainless Steel 410 Pipe

View Product

Stainless Steel 321 Pipe

View Product

Stainless Steel 317L Pipe

View Product

Stainless Steel 310 Pipe & Tube

View Product
← Stainless Steel 304H Pipe
Stainless Steel 316L Pipe →

Looking For Reliable Industrial Material Supply?

Contact OM Export India for pricing, technical support, stock availability and export enquiries.

Request Quote Call Now
×

Download Company Profile