Stainless Steel 309 Buttweld Fittings

KVN Steels is a trusted manufacturer, supplier, and global exporter of Stainless Steel 309, 310, and 310S Buttweld Fittings. These fittings are engineered for high-temperature and corrosive environments, making them ideal for industries such as petrochemicals, oil & gas, refineries, thermal power plants, and more.

We offer a complete range of SS 309, SS 310, and SS 310S buttweld pipe fittings including:

Elbows (90°, 45°, Long/Short Radius)
Tees (Equal & Reducing)
Reducers (Concentric & Eccentric)
Caps, Crosses, Stub Ends, and Bends

Our fittings comply with international standards like ASTM A403 and are available in seamless, welded, and fabricated forms. With excellent heat resistance, oxidation resistance, and mechanical strength, these fittings are perfect for high-pressure and high-temperature piping systems.

We cater to domestic as well as international markets including UAE, Saudi Arabia, Qatar, Oman, Kuwait, Iraq, Iran, and Africa. With ready stock, custom sizing, and timely delivery, KVN Steels is your reliable partner for premium stainless steel buttweld fittings

UNS S30900 Pipe Elbow, DIN 1.4841 Stub End, SS 310S Pipe Fittings, ASME SA403 SS 310S Pipe Bend, UNS S31000 Seamless Fittings, Stainless Steel 309 Pipe Fittings Exporter, ASTM A403 SS 310 Butt weld Pipe Fittings, ANSI B16.9 SS 310S Pipe Cap , ASTM A403 WP310 / 310S Stainless Steel Buttweld Fittings,

SS 309/310/310S Buttweld Fittings are connecting the branches of the pipeline together with many types. However, the tees are also available in many types such as equal tee, reducing tee, as well as the unequal tee. Another type of buttweld fittings that is most commonly used in the industrial application is the buttweld cross which is also connecting the branches together. Reducers are used to change the size of the flow in the fluids. They are also available in the two types such as concentric reducers and eccentric reducers. By using the types of buttweld fittings the industrial applications are working smoothly and performing the flow of fluids from one place to another.
SS 310S 180 Deg Elbow, DIN 1.4833 LR Elbow, ANSI B16.28 Stainless Steel 309 Equal Tee, SS 309 Reducer Trader, SS 310 Buttweld Elbow Dealer, ASTM A403 Stainless Steel 309 / 310 / 310S Fittings, DIN 1.4845 Reducing Tee Stockist, UNS S31008 SR Elbow, MSS SP-43 or MSS SP-79 Stainless Steel 309 Welded Pipe Fittings, ASTM A403 WP310S Stainless Steel Piggable Bend Supplier in India.

SS 309 is the austenitic grade alloy stainless steel which is widely used in industrial applications. However, the alloy is used in the applications which are working with the high-temperature environments. This is the reason that the buttweld fittings are having good corrosion resistance ability.

The SS 310 is another stainless steel version of grade which is used in the development of the buttweld fittings. This is the way that the fittings are working in elevated temperatures. Another way is using the SS 310S, it is the alloying grade which is modified as per the version of the 310-grade alloy. And it is the way that the buttweld fittings are having many properties like corrosion resistance, great ductility, high tensile strength, and others.

309/310/310S Stainless Steel ASTM A403 Buttweld Fittings 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 Elbow

Stainless Steel 309 90 Deg Elbow, ASTM A403 SS 310 45 Deg Elbow, UNS S31000, S31008 180 Deg Elbow, UNS S30900 LR Elbow, DIN 1.4841 SR Elbow, ANSI B16.9 SS 310S 90 Degree Short Radius Elbow, 310S SS 45 Deg Long Radius Elbow

SS 309/310/310S Tee

SS ASTM A403 WP309 Equal Tee, ASME B16.9 Stainless Steel 310S Pipe Tee, DIN 1.4833 Butt weld Tee, ASME SA403 Stainless Steel 310 Reducing Tee, DIN 1.4833 Unequal Tee, UNS S30900 / S31000 / S31008 Tees, A403 WP 310 SS Straight Tee

SS 309/310/310S Eccentric Reducer

B16.9 Stainless Steel 309 Eccentric Reducer Supplier, ASTM A403 Stainless Steel WP310 Eccentric Reducer, ASTM A403 WP310S SS Eccentric Reducer, UNS S31000 | S31008 Eccentric Reducers, DIN 1.4845 Eccentric Reducer

SS 309/310/310S Concentric Reducer

ANSI B16.9 Stainless Steel 309 Concentric Reducer Supplier, SS ASME SA 403 WP310 Concentric Reducer, Stainless Steel 310S Concentric Reducer, UNS S31000, S31008 Concentric Reducers, SS DIN 1.4833 / 1.4841 Concentric Reducer

SS 309/310/310S Long Stub End

ASTM A403 WP309 SS Long Stub End Supplier, ASME B16.9 Stainless Steel 310 Long Stub Ends, UNS S30900 / S31000 / S31008 Long Stub End, SS 310S Long Stub End, SS 309/ 310 Lap Joint Stub End, DIN 1.4833 / 1.4841 Long Stub End

SS 309/310/310S Short Stub End

ASTM A403 SS 309 Short Stub End Supplier, ASME B16.9 Stainless Steel A403 WP 310S Short Stub Ends, ASME SA 403 Stainless Steel 310S Short Stub End, SS UNS S30900 Short Stub Ends, DIN 1.4841 Short Stub End

SS 309/310/310S Cap

ASTM A403 / SA403 Stainless Steel WP309 Pipe Cap Supplier, ASME B16.9 SS 310 End Pipe Cap, SS UNS S30900 Pipe End Cap, UNS S31000 Buttweld Cap, DIN 1.4845 Cap, A403 WP 310S Buttweld Pipe Cap, UNS S31008 End Cap

SS 309/310/310S Cross

ASTM A403 Stainless Steel 309 Equal Cross, ASME B16.9 SS 310 Buttweld Cross, ASTM A403 WP310S Cross, SS UNS S30900 / S31000 Unequal Cross, SS S31008 Cross, DIN 1.4833 Reducing Cross

SS 309/310/310S Pipe Bend

ASME SA 403 SS 309 Pipe Bend Exporter, B16.9 Stainless Steel 310 Piggable Bend, UNS S30900 / S31000 / S31008 U Bend, SS DIN 1.4841 Long Radius Bend, ASTM A403 Stainless Steel 310S Buttweld Bend

Specifications :

ASTM A403 / ASME SA403

Dimensions :

ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799

Size :

Seamless Butt Weld Fittings : 1/2" - 10" | Welded Butt Weld Fittings : 1/2" - 48"

Schedule :

SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75

Bending Radius :

R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom

Type :

Seamless / ERW / Welded / Fabricated

Thickness :

20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80 etc.

Chemical Composition of SS 309/310/310S Seamless and Welded Pipe Fittings

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 ASME SA403 SS WP309 / 310/ 310S Buttweld Pipe Fittings

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 %