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1.4404
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Introduction:
This is one of the family of 17%Cr 12-13%Ni steels
containing between 2 and 3% Mo (S316xx series). This
is the standard grade used where specific attributes
of other members of the family are not necessary -
eg. no likelihood of IGC caused by welding.
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 |
11.00 |
14.00 |
| Molybdenum |
2.00 |
2.50 |
| Manganese |
- |
2.00 |
| Carbon |
- |
0.03 |
|
Similiar Specifications:
ISO 2604 57
ISO 683/13 19
16.5-18.5%Cr, 11-14%Ni, 2.0-2.5%Mo, <2%Mn,
<0.03%C
EURONORM X2 CrNiMo 17
13 2
16.5-18.5%Cr, 11.0-14.0%Ni, 2.0-2.5%Mo, <2.0%Mn,
<0.030%C
ASTM UNS S31603 316L
16-18%Cr, 10-14%Ni, 2.0-3.0%Mo, <0.10%N, <2.0%Mn,
<0.03%C
BS 316S11
16.5-18.5%Cr, 11-14%Ni, 2.0-2.5%Mo, <2%Mn, <0.03%C
DIN X2 CrNiMo 17 13 2
1.4404
16.5-18.5%Cr, 11-14%Ni, 2.0-2.5%Mo, <2%Mn, <0.03%C
JIS SUS 316L
16-18%Cr, 12-15%Ni, 2.0-3.0%Mo, <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
ISO 2604 /4 P57
EURONORM X2
CrNiMo 17 13 2 88-86/2, 88-86/3
ASTM UNS S31603
316L 167, 240, 480
BS 316S11 1449/2, 1501/3
DIN X2
CrNiMo 17 13 2 1.4404 17440, 17441
JIS SUS 316L 4304, 4305, 4307
Bar & long products
EURONORM X2
CrNiMo 17 13 2 88-86/1
ASTM UNS S31603
316L 276, 479, 484
BS 316S11 970/1, 1502
DIN X2
CrNiMo 17 13 2 1.4404 17440
JIS SUS 316L 4303, 4308, 4318
Forgings & others
EURONORM X2
CrNiMo 17 13 2 88-86/1, 119-74
ASTM UNS S31603
316L 314, 473, 484, 182, 403
BS 316S11 970/1, 1503
DIN X2
CrNiMo 17 13 2 1.4404 17440
JIS SUS 316L 3214, 4319
Tube and/or pipe
ISO 2604 /2 TS57, /5 TW57
BS 316S11 3605
DIN X2
CrNiMo 17 13 2 1.4404 17455, 17456, 17457, 17458
JIS SUS 316L 3463, 3459
ASTM UNS S31603
316L 213, 249, 269, 270, 450, 511, 554, 632, 688,
778
Pipe
ASTM UNS S31603
316L 312, 358, 409, 530, 813, 814
General
ISO 683/13 19
BS 316S11 5500
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Page Last Modified: 7/04/06 17:30
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