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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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S30451 (304N)
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Introduction:
This steel is a high-strength version of UNS S30400,
X 5 CrNi 18 10. It has
an economic balance of alloying elements to ensure
its good cold formability, corrosion resistance, toughness
and good mechanical properties without excessive work-hardening.
Likely to perform well in unpolluted atmospheres but
may tarnish or lightly rust in damp atmospheres around
some industrial and coastal/marine locations. In fresh
and potable water precautions should be taken to avoid
crevice attack under deposits, etc. Performance in
aerated seawater is not good without adequate galvanic
or cathodic protection. Its PREN is low: 20-24.
The low carbon version X2CrNiN
18 10 \ UNS S30453 is
an option where sensitization to intergranular corrosion
of weld zones has to be minimal. Stability and toughness
at cryogenic temperatures is high.
Metallurgy:
The overall composition of the 304xx type alloys balance
the ferrite-forming elements (Cr,Mo,Si) with sufficient
Ni,Mn,C and N to promote stable austenite and prevent
martensite formation.
The increased nitrogen improves strength.
Composition:
| Element |
Minimum
(%) |
Maximum
(%) |
| Chromium |
18.00 |
20.00 |
| Nickel |
8.00 |
10.50 |
| Nitrogen |
0.10 |
0.16 |
| Manganese |
- |
2.00 |
| Carbon |
- |
0.08 |
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Similiar Specifications:
EURONORM X5 CrNiN 18 9
KT
17-19%Cr, 8-11%Ni, 0.12-0.22%N, <2%Mn, <0.06%C
ASTM UNS S30451 304N
18-20%Cr, 8-10.5%Ni, 0.10-0.16%N, <2%Mn, <0.08%C
BS 304S71
17-19%Cr, 8-11%Ni, 0.12-0.22%N, <2%Mn, <0.07%C
JIS SUS 304N1
18-20%Cr, 7-10.5%Ni, 0.10-0.25%N, <2%Mn, <0.08%C
Applications:
Used where the extra strength compared with S30400
is advantageous.
Included in the ASME codes and standards for plate,
sheet, strip, bars, tubes, pipes and fittings.
This 'KT' grade and a low carbon version are included in
Euronorm 141-79 for steels generally used in
pressure vessels for very low temperature service.
Product Forms:
Plate, Sheet and Strip
EURONORM X5
CrNiN 18 9 KT 141-79 (KT)
ASTM UNS S30451
304N 240, 480, 666
JIS SUS 304N1 4304, 4305, 4307
Bar and Long Products
ASTM UNS S30451
304N 276, 479, 484
BS 304S71 1502
JIS SUS 304N1 4303, 4308
Forgings and Others
ASTM UNS S30451
304N 182, 403
Tube
ASTM UNS S30451
304N 213, 249, 450, 688
Pipe
ASTM UNS S30451
304N 312, 358, 376, 430, 530, 813, 814
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Page Last Modified: 7/04/06 17:49
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