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

Kobs India is one of the major manufacturers of Stainless Steel Seamless Pipes 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 Pipes. 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 :
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)

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)

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

Product Features:

Product Usage & Application :

Chemical Composition AISI 304 (1.4301), AISI 304L (1.4307), AISI 304H (1.4948)

C Mn Si P S Cr Ni N
AISI 304 (1.4301) 0.07max 2.0max 0.75max 0.045max 0.03max min: 18.0 max: 20.0 min: 8.0 max: 10.5
AISI 304L (1.4307) 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
AISI 304H (1.4948) min: 18.0 max:20.0 min: 8.0 max: 10.5 min: 0.04 max:0.10 0.75 max 2.0 max 0.045 max 0.03 max 0.10max

Chemical Composition AISI 309 (1.4828), 310S (1.4845), AISI 316 ( 1.4401)

SS 309 (1.4828)SS 310 (1.4845)SS ( 1.4401)
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 AISI 316 ( 1.4401), AISI316L ( 1.4404 /1.4432), AISI 316Ti (1.4571)

C Mn Si P S Cr Mo Ni N
316 ( 1.4401)
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 ( 1.4404 /1.4432)
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
316Ti (1.4571) - - - - - 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 (1.4438), 317L (1.4541)

Grade C Mn Si P S Cr Mo Ni N
317 (1.4438) 0.08 max 2 max 1 max 0.040 max 0.03 max 18 – 20 3 – 4 11 – 14 -
317L (1.4541) 0.035 max 2 max 1 max 0.040 max 0.03 max 18 – 20 3 – 4 11 – 15 -

Chemical Composition 321 (1.4541), 321H (1.4878)

% 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(1.4961), 347H (1.4550)

C Cr Mn Ni P S Si Cb/Ta
347 (1.4961) 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 (1.4550) 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 (1.4539)

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

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.

Packing :

Why Choose Us :

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

OUR SUMMARY:
Reviewer
Samsung Engineering
Review Date
Reviewed Product
Pipes & Tubes Manufacturer & Exporter
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