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| Mailing Address |
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UKF Stainless Ltd
12 Buntsford Park Road
Bromsgrove
Worcestershire
B60 3DX
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| Telephone / Fax |
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01527 578686 |
| Fax: |
01527 837792 |
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| Email |
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 info@ukfstainless.co.uk |
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1.4563
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Introduction:
This 'super' austenitic steel (PREN about 40) has
been shown to have high pitting resistance in seawater.
Compared with UNS S304xx, S316xx and S317xx steels,
it shows superiority against crevice attack in seawater
and far higher resistance to stress corrosion cracking
in boiling concentrated chlorides. Design stresses
for service up to 315°C (600°F) are given
in ASME II.
Metallurgy:
The very high level of chromium plus molybdenum
is balanced by sufficient nickel (and in some versions
nitrogen additions) to ensure a fully austenitic structure.
Copper is also added to aid corrosion resistance.
Composition:
| Element |
Minimum
(%) |
Maximum
(%) |
| Chromium |
26.00 |
28.00 |
| Nickel |
30.00 |
32.00 |
| Molybdenum |
3.00 |
4.00 |
| Nitrogen |
0.04 |
0.15 |
| Manganese |
- |
2.00 |
| Carbon |
- |
0.02 |
| Copper |
0.80 |
1.50 |
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Similiar Specifications:
ASTM UNS N08028
26-28%Cr, 29.5-32.5%Ni, 3-4%Mo, <2%Mn, <0.03%C,
0.6-1.4%Cu
DIN/SEW X1 NiCrMoCuN
31 27 4 1.4563
26-28%Cr, 30-32%Ni,
3-4%Mo, 0.04-0.15%N, <2%Mn, <0.02%C, 0.8-1.5%Cu
Applications:
Coolers, condensers, and piping in process and chemical
industries.
Oil production including sour oil strippers.
Heat exchangers handling acids such as sulphuric and phosphoric contaminated with chlorides or
fluorides.
Product Forms:
Plate,sheet
& strip
ASTM UNS N08028
B709
Tube
ASTM UNS N08028
B668
General
DIN/SEW X1
NiCrMoCuN 31 27 4 1.4563 SEW400
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Page Last Modified: 7/04/06 17:25
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