SS 310S Seamless Pipes Manufacturer and Supplier

Stainless Steel 310S seamless pipes are high-temperature stainless steel pipes made to ASTM A312 / ASME SA-312 (grade TP 310S, UNS S31008). They contain 24-26% chromium, 19-22% nickel, and very low carbon (max 0.08%), making them the low-carbon version of 310 stainless steel, ideal for welding and heat resistance. This composition provides outstanding oxidation resistance in continuous service up to 2000°F (1050°C) and intermittent service up to 2100°F (1150°C). Minimum tensile strength sits at 75 ksi (515 MPa), yield strength at 30 ksi (205 MPa), and elongation at 35%. The low-carbon cap reduces sensitisation risk during welding. TP 310S is specifically used for high-temperature central-station service. Available sizes range from 1/2″ to 24″ NPS, with wall thickness from 0.6 mm to 20 mm across schedules SCH 5S through SCH 160.

Sachiya Steel International, located in Mumbai, India, specialises in the manufacturing, supplying, stocking and exporting of Stainless Steel 310S seamless pipes. Backed by more than two decades in the industry and certified with ISO 9001, ISO 14001 and ISO 45001, we keep a substantial inventory, ready for quick shipment, ranging from 1,500 to 2,000 metric tons.

These 310S stainless steel seamless pipes are utilised in furnaces, kilns, heat exchangers, incinerators and petrochemical processing equipment across the globe. Every pipe ships with mill test certificates (EN 10204 3.1) and full traceability documentation.

This page covers the following:

Specifications
Pricing
Chemical Composition
Mechanical Properties
Equivalent Designation
Industrial Applications
Grade Comparison (310S vs 310)
Shipping and Packaging
Frequently Asked Questions

ASTM A312 Stainless Steel 310S Seamless Pipe Specifications

This table shows the main specifications of ASTM A312 Stainless Steel 310S seamless pipes, such as standards, sizes, schedules, shapes, and finishes. It helps check if these pipes are suitable for high-temperature and corrosion-resistant industrial use.

Property	Details
Standard	ASTM A312 / ASME SA-312, ASTM A376 / ASME SA-376
Size Range	1/2 inch to 24 inch NPS (6 mm OD to 610 mm OD)
Wall Thickness	0.6 mm to 20 mm
Schedules	SCH 5S, 10S, 10, 40S, 40, 80S, 80, 120, 160, XXS
Length	Single Random (5.5-6.5 m), Double Random (10.5-12.5 m), Cut Length
Forms	Round, Square, Rectangular (Seamless)
End Type	Plain End, Bevelled End, Threaded
Finish	Annealed and Pickled, Bright Annealed, Cold Drawn, Polished (No. 1, 2B, No. 4, No. 8)
Dimensions Standard	ASME B36.19M / ASME B36.10M

Stainless Steel 310S Seamless Pipe Schedule Chart

Schedule number determines wall thickness relative to the pipe’s nominal bore. Higher schedules mean thicker walls and greater pressure capacity.

NPS	OD (mm)	SCH 10S (mm)	SCH 40S (mm)	SCH 80S (mm)
1/2 inch	21.3	1.65	2.77	3.73
1 inch	33.4	2.77	3.38	4.55
2 inch	60.3	2.77	3.91	5.54
4 inch	114.3	3.05	6.02	8.56
6 inch	168.3	3.40	7.11	10.97
8 inch	219.1	3.76	8.18	12.70
10 inch	273.1	4.19	9.27	12.70
12 inch	323.9	4.57	9.53	12.70

Stainless Steel 310S Seamless Pipe Weight Chart

Pipe weight per metre is calculated using: Weight (kg/m) = (OD – WT) × WT × 0.02466 × density factor. For SS 310S (density 7.98 g/cm³), multiply the carbon steel weight by 1.0155.

NPS	OD (mm)	SCH 10S (kg/m)	SCH 40S (kg/m)	SCH 80S (kg/m)
1/2 inch	21.3	0.80	1.27	1.62
1 inch	33.4	2.09	2.50	3.24
2 inch	60.3	3.93	5.44	7.48
4 inch	114.3	8.37	16.07	22.32
8 inch	219.1	19.96	42.55	64.64

Stainless Steel 310S Seamless Pipe Price List

SS 310S seamless pipes typically cost ₹520–₹800 per kg in India, and internationally cost $1.5 to $9 per kg. The exact price depends on the pipe’s outer diameter, wall thickness, order quantity, and whether it meets A312 or A376 specifications. Sizes above 4″ NPS and below 1-1/2″ are slightly more expensive. Because raw material prices change every week.

Chemical Composition of Stainless Steel 310S Seamless Pipes

The table below shows the chemical composition of SS 310S (UNS S31008) seamless pipes and the main elements that give them strong oxidation resistance at high temperatures.

CarbonC

0.08 max

ManganeseMn

2.00 max

PhosphorusP

0.045 max

SulphurS

0.030 max

SiliconSi

1.50 max

ChromiumCr

24.0-26.0

NickelNi

19.0-22.0

Mechanical Properties of Stainless Steel 310S Seamless Pipes

The table below shows the mechanical properties of ASTM A312 TP 310S seamless pipes, such as strength and elongation, and how they perform under high pressure and high temperatures.

75 / 515

ksi / MPa (min)

Tensile Strength

30 / 205

ksi / MPa (min)

Yield Strength

35%

(min)

Elongation

Property	Value
Tensile Strength (min)	75 ksi / 515 MPa
Yield Strength (min)	30 ksi / 205 MPa
Elongation (min)	35%

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Stainless Steel 310S Seamless Pipe Equivalent Designations

This table lists its international equivalent grades to make global engineering and procurement comparison easy.

Standard	Designation
Europe (EN/DIN, UNS)	X8CrNi25-21 / W.Nr. 1.4845 / UNS S31008
Japan (JIS)	SUS 310S
China (GB)	06Cr25Ni20
India (IS)	IS 6911 Grade 25Cr20Ni
International	Alloy 310S / 25Cr-20Ni

Stainless Steel 310S Seamless Pipe Industrial Applications

SS 310S seamless pipes are used where temperatures reach 1050°C (1925°F) and strong resistance to oxidation, carburisation, and sulphidation is essential. Three primary categories cover the majority of demand:

Furnace and Kiln Applications

Alloy 310S seamless pipe performs reliably inside industrial furnaces, roller hearth kilns, and annealing lines. Radiant tubes, muffles, and retorts in heat treatment plants also rely on this grade.

Heat Exchanger Applications

Heat exchanger tube bundles operating above 800°F (427°C) benefit from 310S’s creep resistance and thermal stability. Waste heat recovery boilers, superheater sections, and flue gas exchangers are common installations.

Petrochemical and Refinery Applications

Petrochemical crackers, reformer pigtails, and catalyst regeneration lines use TP 310S seamless pipes to resist carbon diffusion. Refinery flare tips and thermal oxidiser ducting also use this grade.

Stainless Steel 310S vs 310 Seamless Pipes Key Differences

The table below compares Stainless Steel 310 and 310S seamless pipes, showing how they differ in carbon content, weldability, strength, and typical high-temperature uses.

Feature	Stainless Steel 310	Stainless Steel 310S
Carbon Content	High (C <= 0.25%)	Low (C <= 0.08%)
Primary Advantage	Higher creep strength at extreme temperatures	Superior weldability and corrosion resistance
Service Temperature	Up to 1150 C (2100 F)	Up to 1150 C (2100 F)
Weldability	Difficult; prone to carbide precipitation	Excellent; resists intergranular corrosion
Common Applications	Kilns, furnace components, saggers	Heat exchangers, boiler tubes, flare tips
ASTM Specification	ASTM A312 / ASME SA312	ASTM A312 / ASME SA312

Shipping & Packaging

Heavy-duty wooden boxes Packing

Export Packaging Standard

We strictly follow seaworthy export handling standards to protect SS 310S seamless 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

Pipe Bundle Yard Staging

Container End-Cap Protection

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.

USA
Canada

Frequently Asked Questions:

What is the difference between SS 310S and SS 310 Seamless Pipes? +

SS 310S has lower carbon (≤0.08%) than SS 310 (≤0.25%), so it welds better and resists intergranular corrosion while keeping a similar 25Cr-20Ni composition and high-temperature rating.

Is ASTM A312 / ASME SA-312 a Seamless Pipe specification? +

ASTM A312 covers both seamless and welded stainless steel pipes. For seamless pipes specifically in high‑temperature service, ASTM A376 / ASME SA‑376 also applies to TP 310S.

What is the difference between SS 304 and SS 310S Seamless Pipes? +

310S has higher chromium and nickel (about 25Cr‑20Ni) than 304, giving much better oxidation resistance above 800°F (427°C). Use 310S for sustained service above 800°F.

What sizes are available for SS 310S seamless pipes? +

Available from 1/2″ to 24″ NPS (6–610 mm OD), wall thickness 0.6-20 mm, schedules SCH 5S to SCH 160, in single random, double random, or custom-cut lengths.

What is the maximum service temperature for SS 310S Seamless Pipes? +

310S seamless pipes can be used continuously up to 2000°F (1050°C) and intermittently up to 2100°F (1150°C), offering strong oxidation resistance under mildly cyclic conditions.

How to calculate the weight of SS 310S Seamless Pipe? +

Use the formula: Weight (kg/m) = (OD – WT) × WT × 0.02466 × density factor. For 310S (density 7.98 g/cm³), multiply the equivalent carbon steel pipe weight by 1.0155.