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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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S30940 (309Nb)
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Introduction:
Compared with the 18Cr9-10Ni grades which maintain
strength and scaling resistance up to 700-800°,
this steel has scaling resistance up about 1000°C
in air. It is part of the family of 23Cr12Ni stainless
steels which differ in their carbon content and the
stabilization of it with niobium:
| S30900
309 |
X
15 CrNi 23 12 |
0.20%C
max |
| S30908
309S |
X
6 CrNi 22 12 |
0.08%C
max |
| S30940
309Nb |
- |
0.08%C
max |
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Nb=10xC
to 1.1% |
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This higher carbon grade exhibits
slightly higher creep and stress rupture strength
at 700-900°C but ASME II does not differentiate
this in its design stresses. Performance in corrodents
and under impact at ambient temperatures may be influenced
by various phases that may precipitate during prolonged
high temperature exposures.
Composition:
| Element |
Minimum
(%) |
Maximum
(%) |
| Chromium |
22.00 |
24.00 |
| Nickel |
12.00 |
16.00 |
| Manganese |
- |
2.00 |
| Carbon |
- |
0.08 |
| Niobium |
10
X C |
1.10 |
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Similiar Specifications:
ASTM UNS S30940
309Nb
22-24%Cr, 12-16%Ni, <2%Mn, <0.08%C,
10 x C-1.10%Nb
Applications:
Heat resisting tubing in recuperaters, conveyer parts,
Heat-treating equipment, Petrochemical plant,
Welding consumables for making
dissimilar metal joints between austenitic and structural
carbon or
low alloy steels.
Product Forms:
Plate, Sheet and Strip
ASTM UNS S30940 309Nb 167, 240, 480
Bar and Long Products
ASTM UNS S30940 309Nb 276, 479, 484
Forgings and Others
ASTM UNS S30940 309Nb 314, 484
Tube and/or Pipe
ASTM UNS S30940 309Nb 213, 249, 450
Pipe
ASTM UNS S30940 309Nb 312, 358, 409, 530, 813, 814
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Page Last Modified: 10/04/06 11:08
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