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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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| Tel: |
01527 578686 |
| Fax: |
01527 837792 |
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| Email |
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 info@ukfstainless.co.uk |
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X1 CrNiMoCuN 20 18 7
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Introduction:
A 'super' austenitic steel in which the additions
of chromium, molybdenum and nitrogen give high resistance
to pitting in sea water. This alloy has a mean Pitting
Resistance Equivalent Number ('PREN' = Cr+3.3Mo+16N)
of 43.8. Tests indicate high resistance to crevice-corrosion
attack in seawater and to stress corrosion cracking
in hot concentrated sodium chloride.Compared with
CrNiMo 17 12 2.5 steels, it shows superior corrosion
resistance in many acids at similar
concentrations and its yield strength is approximately
50% higher. Good weldability using Ni-Cr-Mo consumables.Quench
annealing and short periods within the 600-1000°C
range avoids the possible development of deleterious
sigma phase, which may embrittle and impair corrosion
resistance.
Composition:
| Element |
Minimum
(%) |
Maximum
(%) |
| Chromium |
19.50 |
20.50 |
| Nickel |
17.50 |
18.50 |
| Molybdenum |
6.00 |
7.00 |
| Nitrogen |
0.18 |
0.25 |
| Manganese |
- |
1.00 |
| Carbon |
- |
0.02 |
| Copper |
0.50 |
1.00 |
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Similiar Specifications:
EURONORM X1 CrNiMoCuN 20 18 7 (1.4547)
19.5-20.5%Cr, 17.5-18.5%Ni, 6.0-7%Mo, 0.18-0.25%N,
<1%Mn, <0.02%C, 0.5-1.0%Cu
ASTM UNS S31254
19.5-20.5%Cr, 17.5-18.5%Ni, 6.0-6.5%Mo, 0.18-0.22%N,
<1%Mn, <0.02%C, 0.5-1.0%Cu
Applications:
Marine and offshore heat exchangers, cooling water
and fire fighting systems.
Desalination.
Pulp bleaching plant.
Waste incineration, gas cleaning and anti-pollution
plant.
Product Forms:
Plate,sheet
& strip
ASTM UNS S31254
167, 240, 480
Bar & long products
ASTM UNS S31254
276, 479, 484
Forgings & others
ASTM UNS S31254
473, 484, 182, 403
Tube
ASTM UNS S31254
249, 269
Pipe
ASTM UNS S31254
312, 358, 409, 530, 813, 814
BS 347S51 5500
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Page Last Modified: 10/04/06 11:10
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