Specifications of Stainless Steel 310S Welded Pipe

The specifications of Stainless Steel 310S welded pipe, including standards, length and surface finish, are listed in the table below:

Specification Details
Standards ASTM A312 / ASME SA312 (Seamless & Welded Austenitic SS Pipes)
ASTM A358 (Electric-Fusion-Welded Pipes for high-temperature service)
ASTM A778 (Welded, Unannealed Austenitic SS Tubular Products)
ASTM A554 (Square and Rectangular sections)
Size Range 1/8” NB to 48” NB (DN 6 to DN 1200)
Wall Thickness SCH 5S, 10S, 20, 40S, 60, 80S, 100, 120, 140, 160, XXS (as per ASME B36.19M / B36.10M)
Length Single Random: 5–7 meters
Double Random: 10–13 meters
Standard: 6 meters
Custom cut lengths available
End Type Plain End (PE), Bevelled End (BE), Threaded
Surface Finish Pickled & Annealed, Bright Annealed, Polished (180G, 320G, 400G, 600G), Mill Finish
Form Round Pipes, Square Pipes, Rectangular Pipes

Stainless Steel 310S Welded Pipe Sizes

SS 310S welded pipe is stocked in the following dimensional range. Custom-cut lengths are available per client specification. EFW pipe per ASTM A358 / ASME SA-358 extends the range to larger diameters from 6″ to 100″ OD for high-pressure applications.

Parameter Range
Nominal Pipe Size (NPS) 1/8″ to 24″
Outer Diameter (OD) 6.35 mm to 610 mm
Wall Thickness 0.8 mm to 12.7 mm
Schedules SCH 5S, 10S, 40S, 80S, 160, XXS
Length Up to 6 metres (single random, double random, cut length)

Stainless Steel 310S Welded Pipe Price

In India, SS 310S welded pipe usually costs ₹500–800 per kg, depending on the pipe’s size, thickness, quantity, and finish. International pricing depends on nickel and chromium commodity rates. The additional cost compared to 304 is due to its higher chromium (24–26% vs 18–20%) and nickel (19–22% vs 8–10.5%) levels. Sachiya Steel International provides competitive rates through mill-direct sourcing. Reach out to us for a quotation tailored to your required size and schedule.

Chemical Composition of ASTM A312 TP 310S Welded Pipe

The table below lists the chemical composition of TP 310S welded pipe along with its proportion in percentage. The 25Cr-20Ni balance gives AISI 310S its stable austenitic structure at elevated temperatures. 310S has a lower carbon content than 310 (max 0.08% vs 0.25%), which reduces susceptibility to sensitisation during welding.

Carbon C
Max 0.08%
Manganese Mn
Max 2.00%
Phosphorus P
Max 0.045%
Sulphur S
Max 0.030%
Silicon Si
Max 1.50%
Chromium Cr
24.0 – 26.0%
Nickel Ni
19.0 – 22.0%
Iron Fe
Balance

Mechanical Properties of 310S Welded Pipe

The mechanical properties of stainless steel 310S welded pipe, including tensile strength and elongation, are listed in the table below. SA-312 TP 310S welded pipe handles structural and pressure loads in high-temperature piping without deformation at these values.

515 / 75
MPa (min)
Tensile Strength
205 / 30
MPa (min)
Yield Strength
35%
(min)
Elongation
Property Value Unit
Tensile Strength (min) 515 / 75 MPa / ksi
Yield Strength, 0.2% Offset (min) 205 / 30 MPa / ksi
Elongation (min) 35 % in 2″ (50.8 mm)
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Equivalent Designations for Stainless Steel 310S Welded Pipe

International designation equivalent to Stainless Steel 310S Welded Pipe, like UNS, Werkstoff Nr and ISO are mentioned below:

Standard Designation
UNS S31008
EN/DIN X8CrNi25-21
Werkstoff Nr. 1.4845
EN (BS) 310S24
AFNOR (France) Z8CN25-20
JIS (Japan) SUS310S
ISO X8CrNi25-21
GB (China) 06Cr25Ni20
GOST (Russia) 20Kh23N18

Industrial Applications of 310S Welded Pipe

310S welded pipe serves 4 primary industrial sectors where sustained heat and oxidising conditions demand a high-chromium, high-nickel alloy:

Furnace and Heat Treatment Equipment

Used for carrying process gases and housing radiant-tube assemblies in continuous annealing furnaces, roller hearth kilns, and batch heat treatment ovens operating at elevated temperatures.

Chemical and Petrochemical Processing

Used in reformer outlet manifolds, catalyst regeneration loops, and high-temperature oxidising process gas streams.

Power Generation

Used in superheater tubing connections, boiler ductwork, and ash-handling systems in coal and biomass power plants.

Food Processing Equipment

Used in high-temperature sterilisation autoclaves and baking oven exhaust systems operating under repeated thermal cycles.

310S vs 310 Stainless Steel Welded Pipe

Stainless Steel 310 and 310S have different carbon content, affecting weldability, corrosion resistance, and high-temperature performance in industrial applications.

Parameter Stainless Steel 310 Stainless Steel 310S
UNS Designation S31000 S31008
Carbon Content Up to 0.25% Max 0.08%
Key Difference Higher carbon content Low-carbon variant of 310
Welding Behavior Prone to chromium carbide precipitation Reduced chromium carbide precipitation
Intergranular Corrosion Resistance Lower (risk of sensitisation) Higher in the as-welded condition
Suitability for Welded Applications Not recommended for corrosive/wet environments Preferred for welded pipe applications
High-Temperature Strength Slightly higher due to higher carbon Slightly lower compared to 310
Sensitisation Risk Higher Lower

310S vs 304 Stainless Steel Pipe

Stainless Steel 310S and 304 have different alloy compositions, temperature resistance, and price levels, so each is better suited to its own range of heat-focused industrial uses.

Parameter Stainless Steel 310S Stainless Steel 304
Chromium Content 24–26% 18–20%
Nickel Content 19–22% 8–10.5%
Thermal Performance Excellent for high-temperature service Moderate high-temperature capability
Max Continuous Service Temperature Up to 1150°C Up to ~870°C
Cost 2–3× higher due to alloy content More economical
Suitable Operating Range Above 900°C applications Best below 900°C
Application Suitability High-temperature, heat-resistant environments General-purpose, moderate heat applications
Key Advantage Superior heat resistance Cost-effective for lower temperatures

Shipping & Packaging

Main export packaging setup Heavy-duty wooden boxes Packing
Export Packaging Standard

We strictly follow seaworthy export handling standards to protect 310S welded pipe from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

  • Heavy-duty wooden boxes with moisture barrier lining
  • HDPE stretch film wrapping on all bundles
  • Plastic end caps on threaded and plain-end pipes
  • Silica gel desiccants to minimize moisture exposure
  • ISPM-15 fumigated wooden packaging for export
shipping preparation Pipe Bundle Yard Staging
Shipping packaging Container End-Cap Protection
Shipping stock Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies stainless steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.

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Frequently Asked Questions:

What is the Difference Between 310S and 310 Welded Pipe? +
310S has less carbon (up to 0.08%) than 310 (up to 0.25%). This makes 310S more resistant to intergranular corrosion after welding. For welded pipe in corrosive or high-moisture conditions, 310S is the recommended choice.
What Filler Metal is used to Weld 310S Stainless Steel Pipe? +
AWS E310-15 coated electrodes and ER310 bare wire are the standard filler materials used. These consumables match the 25Cr-20Ni base composition and maintain corrosion resistance across the weld zone.
What Sizes are available for SS 310S Welded Pipe? +
SS 310S welded pipe is available from 1/8″ to 24″ NPS in schedules 5S through XXS, with wall thickness from 0.8 mm to 12.7 mm. EFW pipe per ASTM A358 extends the range up to 100″ OD.
What is the Maximum Service Temperature for 310S Welded Pipe? +
310S welded pipe handles continuous service up to 1150°C and intermittent service up to 1035°C. Above these thresholds, scaling and creep deformation accelerate.
What is the Difference Between 304 and 310S Stainless Steel Pipe? +
310S has higher chromium (24–26% vs 18–20%) and nickel (19–22% vs 8–10.5%) than 304. This gives 310S a continuous service limit of 1150°C versus 870°C for 304.
What is the Price of SS 310S Welded Pipe in India? +
The indicative price is ₹500–800 per kg, depending on OD, wall thickness, schedule, quantity, and finish. Contact Sachiya Steel International to get the latest pricing.
What is the Weight of SS 310S Welded Pipe? +
Pipe weight depends on OD and wall thickness. Use the formula: Weight (kg/m) = (OD – WT) × WT × 0.02466 × density factor. The density of 310S is approximately 7.98 g/cm³.
Which ASTM Specification covers 310S Welded Pipe? +
ASTM A312 / ASME SA-312 is the primary specification for TP 310S welded pipe. ASTM A358 / ASME SA-358 covers electric-fusion-welded 310S pipe for high-temperature and corrosive service.

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