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Kobs India an innovative expert and supplier with many years of experience, We offers a wide range of Stainless Steel EFW Pipes, Square pipes & tubes, Rectangular tubes, 304 Stainless Steel EFW Pipe, 316 EFW Tubing, 316 EFW Pipe, ss 316l EFW Pipe, 304 EFW Tube, 304 EFW Stainless Steel Tubing & Hydraulic Tube etc. Kobs India committed to upgrade the capabilities of its technical and administrative staff through formal training and continuous technical quality awareness. Our all Stainless Steel EFW Pipes are tested in accordance to internationally recognized standards or our own more stringent internal test procedures, which is developed considering the harsh field conditions. In addition to this we also offer specific testing to our client’s requirement.

This specification cover electric-fusion-welded austenitic chromium-nickel stainless steel pipe suitable for corrosive or high-temperature service, or both, or for general applications. The pipes come in five classes

Material & Grade :

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

Standards Specification:

Range : 6NB to 1200NB

Outer Diameter : 1/8" NPS to 12" NPS

Thickness : 0.6 mm to 12.7 mm

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

 

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 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
0.10
max

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:

  • Durability
  • High strength
  • Effective functionality
  • Sturdy construction
  • Corrosion resistance
  • Dimensional accuracy

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 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
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