309 Stainless Steel Tube Manufacturer, Supplier & Exporter

KVN Steels is a reliable and globally recognized supplier of Stainless Steel 309, 310, and 310S Pipes & Tubes, offering precision-engineered solutions for clients across diverse industries. Our product range includes seamless, welded, and ERW types, manufactured to international standards and tailored to customer-specific requirements. These pipes and tubes are available in a wide selection of sizes, thicknesses, surface finishes, and lengths, with custom options to match unique project demands. Our supply network extends across India, the United Arab Emirates (UAE), Kingdom of Saudi Arabia (KSA), Kuwait, Qatar, the Sultanate of Oman, Iran, and Iraq, ensuring reliable delivery to critical industrial hubs.

Technical Overview

Stainless Steel 309, 310, and 310S are high-performance austenitic alloys designed to withstand extreme heat and corrosive conditions. Grade 309 stainless steel is well-suited for environments with fluctuating high temperatures, offering superior oxidation resistance during thermal cycling. SS 310 further enhances performance with higher chromium and nickel content, making it suitable for continuous service at elevated temperatures. SS 310S, with its lower carbon content, improves weldability and minimizes the risk of carbide precipitation during thermal processing. These alloys are engineered with robust mechanical properties such as high tensile strength, excellent elongation, thermal conductivity, and dimensional stability. The tubes and pipes are available in multiple forms—including round, square, and rectangular—and are often fabricated with tight tolerances to ensure superior fit and function.

Applications & Industry Use

The advanced metallurgy of SS 309/310/310S and SS 410 Pipes & Tubes makes them a preferred choice in industries where performance under thermal stress is paramount. These materials are commonly used in petrochemical processing, power generation, oil and gas infrastructure, pharmaceutical production, pulp and paper mills, and industrial furnaces. Their ability to maintain strength and resist scaling in high-temperature environments also makes them suitable for use in boilers, heat exchangers, thermal processing units, and exhaust systems. Thanks to their durability, corrosion resistance, and formability, these stainless steel grades are also employed in critical infrastructure, transportation, and marine applications, where reliability and safety are essential.

309/310/310S Stainless Steel Pipes and Tubes Equivalent Grades

STANDARD	UNS	WNR.	AFNOR	EN	JIS	BS	GOST
SS 309	S30900	1.4833	-	-	-	-	-
SS 310	S31000	1.4841	-	X2CrNi18-9 / X2CrNi19-11	SUS 310	310S24	20Ch25N20S2
SS 310S	S31008	1.4845	-	X8CrNi25-21	SUS 310S	310S16	20Ch23N18

SS 309/310/310S Seamless Pipes

Stainless Steel 309 Seamless Pipes, UNS S30900 / S31000 / S31008 Seamless Pipes, DIN 1.4833 Seamless Pipes, ASME SA 312 SS TP310S Seamless Piping

SS 309 Seamless Tubes SS 309/310/310S Seamless Tubes

ASME SA213 SS 310 /310S Seamless Tube, ASTM A213 Stainless Steel 309 Seamless Tubing, DIN 1.4841 Seamless Tubes, UNS S31000 / S31008 Seamless Tube

SS 309/310/310S Welded Pipes

Stainless Steel ASTM A312 TP309 Welded Pipes, UNS S30900 / DIN 1.4845 Welded Pipe, ASME SA312 SS 310 Welded Pipes, SS 310S Welded Pipe Supplier

SS 309/310/310S Welded Tubes

DIN 1.4841 Welded Tubing, UNS S30900 Welded Tube, ASME SA 213 Stainless Steel 310 Welded Tubes, ASTM A213 310S SS Welded Tubes

SS 309/310/310S EFW Pipes

ASME SA358 309 SS EFW Pipes, ASTM A358 TP310S Stainless Steel EFW Pipe, SS UNS S30900/ S31000/ S31008 EFW Pipes, SS DIN 1.4841 / 1.4845 EFW Pipes

Stainless Steel 310S ERW Tubes SS 309/310/310S ERW Pipes & Tubes

UNS S30900 ERW Pipes, Stainless Steel 309 ERW Tubing, ASTM A213 TP310 Stainless Steel ERW Tubes, ASME SA 312 SS 310S Pipe

Stainless Steel Pipe Specification :

ASTM A312, A358 / ASME SA312, SA358

SS Tube Specification :

ASTM A213, A269, A249, A511, A554 / ASME SA213, SA269, SA249, SA511, SA554

Pipe Size :

1/8” NB to 24” NB, 1/4” OD to 24” OD sizes.

Tube Size :

1/2" OD to 8" OD.

Thickness Range :

0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS

Type :

Seamless / ERW / Welded / Fabricated Pipes

Form :

Round, Square, Rectangular, Oval, Hydraulic Etc

Length :

Single Random, Double Random & Required Length

End :

Plain End, Beveled End, Treaded

End Protection :

Plastic Caps

Outside Finish :

2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements

Delivery Condition :

Annealed and Pickled, Polished, Bright Annealed, Cold Drawn

Inspection, Test Reports :

Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports

Packing :

Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests

Specials :

Sizes and Specifications other than above can be manufactured on request

Chemical Composition of Stainless Steel 309/310/310S Seamless Pipes And Tubes

Element	SS 309	SS 310	SS 310S
Ni	14 max	19 – 22	19 – 22
Cr	23 max	24 – 26	24 – 26
C	0.20 max	0.25 max	0.08 max
Fe	60 max	Balance
Mn	2 max	2 max	2 max
Si	1 max	1.50 max	1.50 max
S	0.030 max	0.03 max	0.03 max
P	0.045 max	0.045 max	0.045 max

Mechanical Properties Of Stainless Steel 309/310/310S Seamless Pipes and Tubes

Element	SS 309	SS 310	SS 310S
Tensile Strength	Psi – 89900 , MPa – 620	Psi – 75000 , MPa – 515	Psi – 75000 , MPa – 515
Yield Strength (0.2%Offset)	Psi – 45000 , MPa – 310	Psi – 30000 , MPa – 205	Psi – 30000 , MPa – 205
Elongation	45 %	35 %	35 %