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
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) |
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
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 | - |
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 |
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 |
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 | - |
% | 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 |
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 |
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 |
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 |
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 |
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 % |
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 |
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 |
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 |
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.
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 |