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Stainless Steel Seamless Tubes | SS Seamless Tubes | Stainless Steel Seamless Tubes Manufacturer in Mumbai, India

Kobs India supplies stainless steel seamless tube per ASTM A 213, ASTM A 269 and ASTM A 511. We supply common grades of stainless steel such as 304/304L and 316/316L in standard tube sizes and wall thicknesses. We can also supply more challenging stainless steel and nickel seamless tubing in 304H, 309/S, 310/S, 317/L, 321H, 347H, Alloy 20, Duplex 2205, Duplex 2507, Alloy 200/201, C276, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and others. We also supply seamless stainless steel hollow bar for machining applications with wall thicknesses in excess of 2″ for some stainless grades. Most sizes of seamless stainless steel and nickel tube can be cut to exact sizes. Non standard sizes can be made to order. Contact a sales associate today for your exact seamless nickel or stainless steel tubing requirement.

We offer stainless steel seamless tubes in various specifications. The range meets or exceeds the international quality standards. These seamless stainless steel tubes have excellent corrosion resistance and superior dimensional accuracy. We offer stainless steel seamless tubes in different sizes and forms, ensuring a widest choice to the customers. These stainless steel seamless tubes used in general engineering and industrial projects.

KobsIndia is one of the major manufacturers of Stainless Steel Seamless tubes for application in Power generation Nuclear, Thermal and Solar, Refinery and Petrochemical,Oil and Gas, Chemical and Fertilizer and Process Industries. With our expertise in the respective domain, we are involved in providing optimum quality range of SS tubes. Fabricated in strict tandem with the international quality standards, these pipes are appreciated for their durability, sturdy construction and application specific design. Our range caters to the requirements of various industries like construction, automobile and other engineering.

Material & Grade :

Stainless Steel :
Grade: 304, 304L, 304H, 309, 309S, 310, 310S, 316, 316H, 316L , 317, 317L, 321, 321H, 347, 347H, 904L

Standards Specification:

  • Range : ½”Inch and 16”Inch
  • Schedules : SCH. 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS.
  • Length : Single Random, Double Random & Cut Length
  • Specifications : ASTM A312 / ASTM SA312
  • Types : Round, Square, Rectangle, Hydraulic, Honed Tubes
  • End : Plain End, Beveled End

Material & Grade :

Stainless Steel :
AISI 304 (1.4301), AISI304L (1.4307) AISI 304H (1.4948) AISI 309 (1.4828) 310S (1.4845)
AISI 316 ( 1.4401) AISI316L ( 1.4404 /1.4432) AISI 316Ti (1.4571) AISI 317L (1.4438) AISI 321 (1.4541)
AISI 321 H(1.4878) AISI 347H (1.4961) AISI 347 (1.4550) SMO254 (1.4547) AISI904L (1.4539)

Chemical Composition 304, 304L, 304H

C Mn Si P S Cr Ni N
304 0.07max 2.0max 0.75max 0.045max 0.03max min: 18.0 max: 20.0 min: 8.0 max: 10.5
304L 0.03max 2.0max 0.75max 0.045max 0.03max min: 18.0 max: 20.0 min: 8.0 max: 12.0 0.10 max
304H (1.4948) min: 0.04 max:0.10 Max: 2.0 Max:0.75 Max : 0.045 Max: 0.030 min: 18.0 max: 20.0 min: 8.0 max: 10.5 -

Chemical Composition 309, 310, 310S

SS 309SS 310SS 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

Chemical Composition 316, 316L, 316H

C Mn Si P S Cr Mo Ni N
316
0.08
max
2.0
max
0.75
max
0.045
max
0.03
max
min: 16.0
max: 18.0
min: 2.0
max: 3.0
min: 10.0
max: 14.0
0.10
max
316L
0.03
max
2.0
max
0.75
max
0.045
max
0.03
max
min: 16.0
max: 18.0
min: 2.0
max: 3.0
min: 10.0
max: 14.0
0.10
max
316H - - - - - 16.0 2.00 10.0 -
0.08 2 0.75 0.045 0.03 18.0 3.00 14.0 0.1

Chemical Composition 317, 317L

Grade C Mn Si P S Cr Mo Ni N
317 0.08 max 2 max 1 max 0.040 max 0.03 max 18 – 20 3 – 4 11 – 14 -
317L 0.035 max 2 max 1 max 0.040 max 0.03 max 18 – 20 3 – 4 11 – 15 -

Chemical Composition 321, 321H

% Cr Ni C Si Mn P S N Ti Fe
321 min:17.0
max:19.0
min: 9.0
max:12.0
max:0.08 max:0.75 max:2.0 max:0.045 max:0.03 max:0.10 min:5*(C+N)
max:0.70
Balance
321H min:17.0
max:19.0
min: 9.0
max:12.0
min:0.04
max:0.10
min:18.0
max:20.0
max:2.0 max:0.045 max:0.03 max:0.10 min:5*(C+N)
max:0.70
Balance

Chemical Composition 347, 347H

C Cr Mn Ni P S Si Cb/Ta
347 0.08 max min: 17.0
max: 20.0
2.0 max min: 9.0
max: 13.0
0.04 max 0.30
max
0.75
max
min:10x C
max: 1.0
347H min: 0.04
max: 0.10
min: 17.0
max: 20.0
2.0 max min: 9.0
max: 13.0
0.03 max 0.30
max
0.75
max
min:10x C
max: 1.0

Chemical Composition 904L

C Cr Cu Mn Mo Ni P S
Max     Max     Max Max
0.02 19.0-23.0 2.0 4.0-5.0 23.0-28.0 0.045 0.035 1.0

Mechanical Properties 309 / 310 / 310S

Grade Tensile Strength ksi (min) Yield Strength 0.2% ksi (min) Elongation % Hardness (Brinell) MAX Hardness (Rockwell B) MAX
304 75 30 40 201 92
304L 70 25 40 201 92
304H 75 30 40 201 92

Mechanical Properties 316, 316L, 316H

Grade Tensile Strength
ksi (min)
Yield Strength
0.2% ksi (min)
Elongation % Hardness (Brinell) MAX Hardness
(Rockwell B) MAX
316
75 30 40 217 95
316L
70 25 40 217 95
316TI 515(Mpa) 205(Mpa) 35 205 75

Mechanical Properties 317, 317L

Density 8.0 g/cm3
Melting Point 1454 °C (2650 °F)
Tensile Strength Psi – 75000 , MPa – 515
Yield Strength (0.2%Offset) Psi – 30000 , MPa – 205
Elongation 35 %

Mechanical Properties 321, 321H

Grade Tensile Strength
ksi (min.)
Yield Strength 0.2%
Offset ksi (min.)
Elongation -
% in
50 mm (min.)
Hardness
(Brinell) MAX
321/321H 75 30 40 217

Mechanical Properties 347, 347H

Grade Tensile Strength ksi (MPa) min Yield Strength 0.2% ksi offset ksi (MPa) min Elongation (% in 50mm) min Hardness (Brinell) MAX Hardness (Rockwell B) MAX
347/347H 75
(515)
30
(205)
40 201 95

Mechanical Properties 904L

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) Brinell (HB)
904L 490 220 36 70-90 typical 150

Product Features:

  • Seamless Pipes manufacturing using Hot Extrusion facility up to 2"NB/li>
  • Draw bench facility up to 8" NB
  • Solution Annealing Heat Treatment facility up to 8" NB
  • Various grades offered : Austenitic , Super Austenitic ,Duplex ,Super Duplex Stainless Steels
  • Stabilization Heat Treatment Facility for Stabilized Grades

Manufacturing Process :

The process commences with the formation of welded mother tube on the tube mill from imported and tested prime quality stainless steel strips. The latest TIG multi electrode welding technique is employed for superior weld quality and 100% Fusion, with argon purging, No filler metal added.

Product Features:

  • Seamless Pipes manufacturing using Hot Extrusion facility up to 2"NB/li>
  • Draw bench facility up to 8" NB
  • Solution Annealing Heat Treatment facility up to 8" NB
  • Various grades offered : Austenitic , Super Austenitic ,Duplex ,Super Duplex Stainless Steels
  • Stabilization Heat Treatment Facility for Stabilized Grades

Product Usage & Application :

  • Useful in Paper & Pulp Companies
  • Useful in High Pressure Applications
  • Useful in Oil and Gas Industry
  • Useful in Chemical Refinery
  • Useful in Pipeline
  • Useful in High Temperature Application
  • Useful in Water Pipe Line
  • Useful in Nuclear Power Plants
  • Useful in Food Processing and Dairy Industries
  • Useful in Boiler & Heat Exchangers

Other grades also available :

Duplex Steel:
Grade: 2205
Nickel :
Grade: Nickel 200, Nickel 201
Super Duplex Steel:
Grade: 2507 (UNS S32750), Z100
Inconel :
Grade: Inconel 600, Inconel 601, Inconel 625, Inconel 718
Titanium :
Grade: Gr1, Gr2, Gr3, Gr5, Gr7, Gr11
Monel :
Grade: Monel 400, Monel K500, Monel R-405
Hastalloy :
Grade: Hastalloy B2, Hastalloy B3, Hastalloy C22, Hastalloy C276, Hastalloy X
Incoloy :
Grade: Incoloy 800, Incoloy 800H, Incoloy 800HT

Packing :

  • Packing is quite important especially in a case of international shipments in which consignment pass through various channels to reach the ultimate destination, so we put special concern regarding packaging.
  • We pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,
    • Shrink-wrapped
    • Carton boxes
    • Wooden pallets
    • Wooden boxes
    • Wooden crates

Why Choose Us :

  • You can get the perfect material according to your requirement at the least possible price.
  • We also offer Reworks, FOB, CFR, CIF, and door to door delivery prices. We suggest you to do deal for shipping which will be quite economical.
  • The materials we provide are completely verifiable, right from raw material test certificate to the final dimensional statement.(Reports will show on requirement)
  • e guarantee to give a response within 24hours(usually in the same hour)
  • You can get stock alternatives, mill deliveries with minimizing manufacturing time.
  • We are fully dedicated to our customers. If it will not possible to meet your requirements after examining all options, we will not mislead you by making false promises which will create good customer relations.

Tests we carry out (including both Destructive and Non-Destructive) :

  • Positive material recognition
  • Mechanical examining like tensile, Elongation and reduction of area.
  • Large-scale test
  • Chemical examination-Spectro analysis
  • Firmness test
  • Pitting protection test
  • Small tests
  • X-ray test
  • Impact analysis
  • Eddy current examining
  • Hydrostatic analysis
  • Prompt test

OUR SUMMARY:
Reviewer
samsung engneering
Review Date
Reviewed Product
Pipes & Tubes Manufacturer & Exporter
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