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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 60
ISO 683/13 20
16.5-18.5%Cr, 10.5-13.5%Ni,
2.0-2.5%Mo, <2%Mn, <0.07%C
EURONORM X5 CrNiMo 17
12 2
16.5-18.5%Cr, 10.5-13.5%Ni, 2.0-2.5%Mo,
<2.0%Mn, <0.07%C
ASTM UNS S31600 316
16-18%Cr, 10-14%Ni,
2.0-3.0%Mo, <0.10%N, <2.0%Mn, <0.08%C
BS 316S31
16.5-18.5%Cr, 10.5-13.5%Ni,
2.0-2.5%Mo, <2%Mn, <0.07%C
DIN X5
CrNiMo 17 12 2 1.4401
16.5-18.5%Cr, 10.5-13.5%Ni,
2.0-2.5%Mo, <2%Mn, <0.07%C
JIS SUS 316
16-18%Cr, 10-14%Ni,
2.0-3.0%Mo, <2%Mn, <0.08%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 P60
EURONORM X5
CrNiMo 17 12 2 88-86/2, 88-86/3
ASTM UNS S31600
316 167, 240, 480
BS 316S31 1449/2, 1501/3
DIN X5
CrNiMo 17 12 2 1.4401
17440, 17441
JIS SUS 316 4304, 4305, 4307
Bar
& long products
EURONORM X5
CrNiMo 17 12 2 88-86/1
ASTM UNS S31600
316 276, 479, 484
BS 316S31 970/1, 1502
DIN X5
CrNiMo 17 12 2 1.4401
17440
JIS SUS 316 4303, 4308, 4318, 4311
Forgings & others
EURONORM X5
CrNiMo 17 12 2 88-86/1, 119-74
ASTM UNS S31600
316 314, 473, 484, 182, 403
BS 316S31 970/1, 1503
DIN X5
CrNiMo 17 12 2 1.4401
17440
JIS SUS 316 3214, 4319
Tube and/or pipe
ISO 2604 /2 TS60, /5 TW60
BS 316S31 3605
DIN X5
CrNiMo 17 12 2 1.4401
17455, 17456, 17457, 17458
JIS SUS 316 3463, 3459
ASTM UNS S31600
316 213, 249, 269, 270, 271, 450, 511, 554, 632, 688
Pipe
ASTM UNS S31600
316 312, 358, 376, 409, 430, 530, 813, 814
General
ISO 683/13 20
BS 316S31 5500
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Page Last Modified: 10/04/06 11:14
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