krystalsteel pipes
Manufacturer & Exporter of Seamless - Stainless, Duplex & Nickel Alloy Tubes, Pipes & U Tubes
 

Austenitic Stainless Steel

TP - Type of Tabular Products Seamless 'U' Tubes
Grades Austenitic Stainless Steel , Tubes and Pipes.
O.D. / N.B. 3.175 mm to 219.08 mm
& 1/8" NB to 8"NB
6.35 mm to 114.3 mm
& 1/8" NB to 8"NB
15.88 mm to 50.80 mm
Thickness 0.6 mm to 8.18 mm 0.71 mm to 6.02 mm
0.7 mm to 3.68 mm
Length / Leg Length Up to 25 meters Up to 25 meters Up to12 meters Leg Lengths
ASTM Standard
(eqv. to ASEM/EN/DIN etc.)
A213 / A269 / A270 / A312 A249 / A269 / A270 / A312 A688 / A213

Grade UNS No. EN No. C Cr Ni Mo Others
304 S30400 1.4301 0.08 18.00 - 20.00 8.00 - 12.00           -                   -
304L S30403 1.4307 0.035 18.00 - 20.00 8.00 - 12.00           -                   -
310S S31008 1.4845 0.08 24.00 - 26.00 19.00 - 22.00           -                   -
316 S31620 1.4401 0.08 16.00 - 18.00 10.00 - 14.00 2.00 - 3.00                   -
316L S31603 1.4404 0.035 16.00 - 18.00 10.00 - 14.00 2.00 - 3.00                   -
316H S31603 1.4401 0.04 - 0.10 16.00 - 18.00 10.00 - 14.00 2.00 - 3.00                   -
316Ti S31635 1.4571 0.08 16.00 - 18.00 10.00 - 14.00 2.00 - 3.00 Ti:5X(C+N) - 0.70
317L S31703 1.4438 0.035 18.00 - 20.00 11.00 - 15.00 3.00 - 4.00                   -
321 S32100 1.4541 0.08 17.00 - 19.00 9.00 - 12.00           - Ti:5X(C+N) - 0.70
347 S34700 1.4550 0.08 16.00 - 18.00 10.00 - 14.00           -                   -
347H S34709 1.4551 0.04 - 0.10 17.00 - 20.00 9.00 - 13.00           -                   -

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Super Austenitic Stainless Steel
 
  904L 254SMo 6Mo
Alloy Names W.Nr - 1.4539 / UNS No 8904 W.Nr - 1.4547 / UNS No 31254 W.Nr - 1.4529 / UNS No 8926
Product Range Seamless & Welded St & U tubes
6mm OD x 0.7 mm to 50.8 mm OD x 3 mm thk
Seamless & Welded St & U tubes
6 mm OD x 0.7 mm to 50.8 mm OD x 3 mm thk
Seamless St & U tubes
6 mm OD x 0.7 mm to 50.8 mm OD x 3 mm thk
Specifications ASME SB 677 / 673 / 674 &
ASTM A 269
ASME SB 677 / A813 / A814
ASME SB 677
Major Chemical
Composition
Ni - 24.00 / 26.00
Cr - 19.00 / 21.00
Mo - 4.00 / 5.00
Cu - 1.20 / 2.00
Ni - 17.50 / 18.50
Cr - 19.50 / 20.50
Mo - 6.00 / 7.00
Ni - 24.00 / 26.00
Cr - 19.00 / 21.00
Mo - 6.00 / 7.00

  Key Features Applications
904L
  • High resistance to uniform corrosion.
  • High resistance to pitting and Crevice.
  • High resistance to stress corrossion cracking.
  • Good ductility & Weldability.
  • Chemical Process Industry.
  • Pulp & Paper Industry.
  • Flue Gas leaning.
  • Marine Industry.
  • Seawater handling.
  • Hydrometallurgy.
  • Oil and Gas Industry.
  • Pharmaceuticals & Food Industry
254SMo & 6Mo
  • Resistant to crevice corrosion in seawater.
  • Good resistance to erosion corrosion.
  • Excellent corrosion resistance in seawater and concentrated halide environments.
  • High resistance to stress corrosion.
  • Excellent ductility & impact strength at both ambient & sub-zero temperatures.
  • Low magnetic permeability.
  • Chemical Process Industry.
  • Marine Industry and Shipbuilding.
  • Oil and Gas Industry.
  • Pulp & Paper Industry.
  • Power Industry.

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Duplex & Super Duplex Steel

  Alloy 2205 Alloy 2507 Alloy 32760
Alloy Names W.Nr - 1.4462 / UNS No 31803 W.Nr - 1.4410 / UNS No 32750 W.Nr - 1.4501 / UNS No 32760
Product Range Seamless St & U tubes
6 mm OD x 0.7 mm to 4" NB x sch 40
Seamless St & U tubes
6 mm OD x 0.7 mm to 50.8 mm OD x 3 mm thk
Seamless St & U tubes
6 mm OD x 0.7 mm to 50.8 mm OD x 3 mm thk
Specifications SA 789 / 790 SA 789 / 790
SA 789 / 790
Major Chemical
Composition
Ni - 4.50 / 6.50
Cr - 21.00 / 23.00
Mo - 2.50 / 3.50
Ni - 6.00 / 8.00
Cr - 24.00 / 26.00
Mo - 3.00 / 4.50
Ni - 6.00 / 8.00
Cr - 24.00 / 26.00
Mo - 3.00 / 4.00
Cu - 0.50 / 1.00
W - 0.50 / 1.00

  Key Features Applications
Alloy 2205
  • Higher strength than austenitic stainless steels
  • Excellent corrosion resistance in seawater & industrial acids
  • Excellent resistance to intergranular, pitting & crevice corrosion
  • Good sulphide stress corrosion resistance
  • Lower thermal expansion & higher heat conductivity than austenitic
  • Chemical Process Industry.
  • Marine & shipbuilding.
  • Oil & Gas Industry.
  • Pollution Control.
  • Paper & Pulp Industry.
  • Food Industry.
Alloy 2507
  • Excellent corrosion resistance in a wide variety of corrosive chemicals.
  • Outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with Critical Pitting Temperature exceeding 50°C.
  • High strength compared to austenitic and 22%Cr duplex stainless steels.
  • Excellent ductility and impact strength at both ambient and sub-zero temperatures.
  • High resistance to abrasion, erosion and cavitation erosion.
  • Excellent resistance to stress corrosion cracking in chloride containing environments.
  • Listed in NACE MR 01 75 for sour service.
  • ASME Approval for Pressure Vessel application.
  • Chemical Process Industry.
  • Marine & shipbuilding.
  • Oil & Gas Industry.
  • Pollution Control.
  • Paper & Pulp Industry.
  • Food Industry.
  • Agrochemical - Fertiliser Production.
  • Civil Engineering - Sewage Treatment.
Alloy 32760
  • High strength compared to austenitic and 22% chrome duplex stainless steels.
  • Excellent corrosion resistance in a wide variety of corrosive chemicals including seawater and industrial acids.
  • Excellent ductility and impact strength at both ambient and sub-zero temperatures.
  • High resistance to abrasion, erosion and cavitation erosion Excellent resistance to stress corrosion cracking.
  • Applicable for sour service operation.
  • Specified for pressure vessel applications.
  • Chemical Process Industry.
  • Marine & shipbuilding.
  • Oil & Gas Industry.
  • Pollution Control.
  • Paper & Pulp Industry.
  • Food Industry.
  • Agrochemical - Fertiliser Production.
  • Civil Engineering - Sewage Treatment.

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Nickel Based Alloys

  400 625

825

8020
Alloy Names W.Nr - 2.4360 / UNS No 4400 W.Nr - 2.4865 / UNS No 6625 W.Nr - 2.4858 / UNS No 8825 W.Nr - 2.4460 / UNS No 8020
Product Range Seamless St & U tubes
6 mm OD x 0.7 mm to
50.8 mm OD x 3 mm thk
Seamless St & U tubes
6 mm OD x 0.7 mm to
50.8 mm OD x 3 mm thk
Seamless St & U tubes
6 mm OD x 0.7 mm to
50.8 mm OD x 3 mm thk
Seamless St & U tubes
6 mm OD x 0.7 mm to
50.8 mm OD x 3 mm thk
Specifications SB 165 SB 423
SB 705 SB 729
Major Chemical
Composition
Ni - 63.00 (Min)
Cu - 28.00 / 34.00
Fe - 2.5 (max)
Mn - 2.0 (max)
Ni - 58.00 (Min)
Cr - 20.00 / 23.00
Mo - 8.00 / 10.00
Nb + Ta - 3.15 / 4.15
Fe - 5.00 (max)
Ni - 38.00 / 46.00
Cr - 19.50 / 23.50
Mo - 2.50 / 3.50
Fe - 22.00 (min)
Cu - 1.50 / 3.00,
Ti - 0.60 / 1.20
Ni - 32.00 / 38.00
Cr - 19.00 / 21.00
Mo - 2.00 / 3.00
Cu - 3.00 / 4.00
Nb + W - 1.00 (Max)

  Key Features Applications
Monel 400
  • Good strength/ductility properties.
  • Excellent corrosion resistance in a wide variety of corrosive chemicals including seawater and industrial acids.
  • Corrosion resistance in hydrofluoric acid second only to silver.
  • High resistance to erosion corrosion.
  • Excellent resistance to stress corrosion cracking.
  • Chemical Process Industry.
  • Marine & shipbuilding.
  • Oil & Gas Industry.
nconel 625
  • Good strength / ductility properties from sub-zero temperatures to over 980°C.
  • Excellent corrosion resistance & fatigue resistance in seawater & industrial acids.
  • Non-magnetic & spark resistant.
  • Resistant to high temperature oxidation & carburisation.
  • Excellent resistance to stress corrosion cracking.
  • Oil & Gas Industry.
  • Marine Industry & Shipbuilding.
  • Nuclear Power Plant.
Inconel 825
  • Excellent resistance to both reducing & oxidising acids.
  • Excellent resistance to stress corrosion cracking & to localised pitting & crevice corrosion.
  • Good resistance to sulphuric & Phosphoric acid.
  • Chemical process Equipments
  • Acid Production & Pickling Equipment
  • Nuclear Fuel Reprocessing Equipments

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