Specifications of Stainless Steel 314 Pipe

The specifications for stainless steel 314 pipe, including standard, length, size and surface finishes, are listed in the table below:

Parameter Specification
Standards ASTM A312 / ASME SA312 (Seamless & Welded Pipe), ASTM A358 / ASME SA358 (EFW Pipe), ASTM A213 / ASME SA213 (Heat Exchanger Tubes)
Size Range 1/8″ NB to 24″ NB (Seamless & Welded), up to 48″ NB (ERW / EFW)
Wall Thickness SCH 5S, 10S, 20, 40, 60, 80, 120, 140, 160, XXS
Length Single Random (5–7 m), Double Random (10–13 m), Standard 6 m, Custom Cut Lengths
End Type Plain End (PE), Bevelled End (BE), Threaded
Surface Finish Pickled & Annealed, Bright Annealed, Polished (OD/ID as required)
Form Round, Square, Rectangular, Hydraulic Pipes

Stainless Steel 314 Pipe Sizes

SS 314 pipe is stocked in many sizes for both standard plant piping and custom process lines. For special outer diameters or wall thicknesses, Sachiya Steel can supply or make pipes to your project needs.

Parameter Range / Options
Outer Diameter (OD) 6 mm - 1016 mm
Nominal Bore (NB) 1/8" - 16" NB
Wall Thickness 0.6 mm - 65 mm
Schedule SCH 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS
Length 5.8 m, 6 m, 12 m (standard); up to 18 m; custom cut lengths available
End Finish Plain End, Bevelled End, Threaded

Stainless Steel 314 Pipe Price

Stainless Steel 314 pipe usually costs Rs 100–150 per kg in India and about $41–$42 (USD) per kg overseas. Final pricing depends on outer diameter, wall thickness, schedule, length, quantity, surface finish, and whether the pipe is seamless or welded. Raw material costs (nickel and chromium LME rates) also shift pricing monthly. Contact Sachiya Steel International for a quote based on your exact specification and order volume.

Chemical Composition of Stainless Steel 314 Pipe

Silicon at 1.5-3.0% is the key differentiator. Grade 310 caps silicon at 1.50% max; Grade 314 doubles the limit, which is why some in the trade refer to it informally as "310Si." The higher silicon forms a more stable oxide layer at elevated temperatures, directly improving scaling and carburization resistance.

The table below lists the chemical composition of Stainless Steel 314 pipe (UNS S31400) per ASTM A312:

Carbon C
Max 0.25%
Manganese Mn
Max 2.00%
Silicon Si
1.50 – 3.00%
Phosphorus P
Max 0.045%
Sulfur S
Max 0.030%
Chromium Cr
23.0 – 26.0%
Nickel Ni
19.0 – 22.0%

Mechanical Properties of SS 314 Pipe

A yield-to-tensile ratio of roughly 0.50 indicates that the material retains ductility even under significant load. The 40% minimum elongation supports forming, bending, and welding operations during fabrication.

SS 314 pipe’s mechanical properties, including tensile strength, elongation and yield strength, are listed below:

689
MPa (min)
Tensile Strength
345
MPa (min)
Yield Strength
40%
(min)
Elongation
433
Brinell (HBW)
Hardness (max)
Property Value
Tensile Strength (min) 689 MPa (99,900 psi)
Yield Strength, 0.2% Offset (min) 345 MPa (50,000 psi)
Elongation in 50 mm (min) 40%
Hardness, Brinell (max) 433 HB
Hardness, Rockwell B (max) 85 HRB
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Equivalent Designation for Stainless Steel 314 Pipe

International designation equivalent to 314 SS pipe, like UNS No. S31400 is listed in the table mentioned below:

Standard Designation
UNS S31400
JIS SUS314
EN/DIN X15CrNiSi25-20 (1.4841)
EN/NF Z15CNS25-20
ISO X15CrNiSi25-20
GB (China) 0Cr25Ni20Si2
GOST (Russia) 20Kh25N20S2

Applications of Stainless Steel 314 Pipe

SS 314 pipe serves 3 core industrial sectors where continuous exposure to temperatures above 900°C and aggressive atmospheres are standard operating conditions:

Industrial Furnaces and Heat Treatment Equipment

Grade 314 pipe handles radiant tubes, retorts, and muffle components inside batch and continuous furnaces.

Heat Exchangers and Radiant Tubes

In heat exchanger assemblies, radiant tube installations in steel mills and glass plants are a common use case.

Chemical and Petrochemical Processing

Chemical plants use 314 stainless steel pipe in reactor internals, cracking furnace transfer lines, and waste-heat recovery systems.

Shipping & Packaging

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

We strictly follow seaworthy export handling standards to protect 314 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 Price of SS 314 Pipe per Kg? +
SS 314 pipe costs approximately Rs 100-150 per kg in India and $41-$42 per kg (USD) internationally. Pricing can change depending on OD, wall thickness, schedule, order quantity, and current nickel/chromium market rates.
What is the Maximum Operating Temperature for SS 314 Pipe? +
SS 314 pipe can operate at temperatures up to 1150°C (2100°F). Intermittent service allows slightly higher peaks, but prolonged exposure above 1150°C accelerates scaling and shortens service life.
How do you Weld Stainless Steel 314 Pipe? +
Welding SS 314 pipe requires low heat input and matching filler metals (typically ER310 or equivalent high-Cr/high-Ni wire). Preheat is not usually required, but the interpass temperature should stay 150 °C below to limit carbide precipitation. Post-weld heat treatment is generally not necessary for standard applications.
Is Stainless Steel 314 Pipe Magnetic? +
No. SS 314 pipe does not show magnetism in the annealed state because its structure is fully austenitic. Cold working can cause a trace magnetic response, but it remains negligible for most industrial purposes.
What is the Difference Between SS 314 Seamless and Welded Pipe? +
SS 314 seamless pipe is produced without a weld seam, giving it consistent strength and better resistance to fatigue during repeated heating and cooling. Welded pipe is more cost-effective and can be supplied in larger diameters, but the weld area can have lower performance under severe, cyclic high‑temperature conditions.
How does SS 314 Pipe Compare to SS 310 Pipe? +
Grade 314 is essentially Grade 310 with higher silicon (1.5-3.0% vs 1.50% max). The higher silicon content boosts resistance to oxidation and carburization at temperatures above 1000°C. In carburising furnace environments or when operating continuously beyond 1050°C, grade 314 performs better than 310. For applications below 1000°C, grades 310 or 310S are typically more economical options.
What are the Main Applications of Stainless Steel 314 Pipe? +
SS 314 pipe is used in high‑temperature equipment like furnaces, kilns, heat exchangers, radiant tubes, annealing boxes, carburising units, chemical reactors, and power plant parts that run continuously above 900°C.

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