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UKF Stainless Ltd
12 Buntsford Park Road
Bromsgrove
Worcestershire
B60 3DX
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01527 578686 |
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01527 837792 |
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 info@ukfstainless.co.uk |
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X2 CrNiMoN 17 12 2
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Introduction:
These two grades are part of the family of 17%Cr 12-13%Ni
steels containing between 2 and 3% Mo (S316xx series).
These grades are nitrogen strengthened with 2.0-2.5%
Mo or 2.5-3.5%Mo. After 18Cr10Ni (304xx) type steels,
these 17Cr12NiMo (316xx) grades are the most widely
used austenitics. In the damp industrial or coastal
atmospheres of Europe, they perform better than 18Cr10Ni
(304xx) and ferritic grades. In low temperature seawater
they offer limited resistance to pitting but are susceptible
to crevice attack (mean
PREN about 25-27). Their short- and long-time properties
at elevated temperatures are also superior to those
of comparable 18Cr10Ni grades.
Metallurgy:
Conditions where the steels are not quickly
taken through the temperature range 900-500°C
(eg. slow cooling, heat-treatment, service exposure,
high heat input welding ) can allow precipitation
of chromium carbides and sometimes embrittling sigma
formation.
Where sensitization to intergranular corrosion around
these carbides is unacceptable, consideration should
be given to the low carbon (0.03%C max) grades and
to those stabilized with either Ti or Nb.
Composition:
| Element |
Minimum
(%) |
Maximum
(%) |
| Chromium |
16.50 |
18.50 |
| Nickel |
10.50 |
13.50 |
| Molybdenum |
2.00 |
2.50 |
| Nitrogen |
0.12 |
0.22 |
| Manganese |
- |
2.00 |
| Carbon |
- |
0.03 |
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Similiar Specifications:
ISO 683/13 19N
16.5-18.5%Cr, 10.5-13.5%Ni, 2.0-2.5%Mo, 0.12-0.22%N,
<2%Mn, <0.03%C
EURONORM X2 CrNiMoN
17 12 2
16.5-18.5%Cr, 10.5-13.5%Ni, 2.0-2.5%Mo, 0.12-0.22%N,
<2.0%Mn, <0.030%C
ASTM UNS S31653 316LN
16-18%Cr, 10-14%Ni, 2.0-3.0%Mo, 0.10-0.16%N, <2.0%Mn,
<0.03%C
BS 316S61
16.5-18.5%Cr, 10.5-13.5%Ni, 2.0-2.5%Mo, 0.12-0.22%N,
<2%Mn, <0.03%C
DIN X2 CrNiMoN 17 12 2 1.4406
16.5-18.5%Cr, 10.5-13.5%Ni, 2.0-2.5%Mo, 0.12-0.22%N,
<2%Mn, <0.03%C
JIS SUS 316LN
16.5-18.5%Cr, 10.5-14.5%Ni, 2.0-3.0%Mo, 0.12-0.22%N,
<2%Mn, <0.03%C
Applications:
Architectural cladding, doors, windows and fittings
Street furniture
Offshore modules
Tanks and piping of chemical tankers
Production, storage and land-based transport of chemicals,foods and beverages
Pharmaceutical, synthetic fibre, paper and textile
industries
Pressure vessels, cryogenic equipment, high temperature
plant.
Product Forms:
Plate,sheet & strip
EURONORM X2 CrNiMoN 17 12 2 88-86/2, 88-86/3
ASTM UNS S31653
316LN 167, 240, 480
BS 316S61 1501/3
DIN X2 CrNiMoN 17 12
2 1.4406 17440, 17441
JIS SUS 316LN 4304, 4305, 4307
Bar & long products
EURONORM X2 CrNiMoN 17 12 2 88-86/1
ASTM UNS S31653
316LN 276, 479, 484
BS 316S61 1502
DIN X2 CrNiMoN 17 12
2 1.4406 17440
JIS SUS 316LN 4303
Forgings & others
EURONORM X2 CrNiMoN 17 12 2 88-86/1
ASTM UNS S31653
316LN 182, 403
DIN X2 CrNiMoN 17 12
2 1.4406 17440
Tube
ASTM UNS S31653
316LN 213, 249, 269, 450, 688
Pipe
ASTM UNS S31653
316LN 312, 358, 376, 530, 813, 814
General
ISO 683/13 19N
BS 316S61 5500
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Page Last Modified: 10/04/06 11:20
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