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X2 CrNi 18 10
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Introduction:
This steel has an economic balance of components to
ensure its good cold formability, corrosion resistance,
toughness and good mechanical properties without excessive
work-hardening. Its low carbon content improves its
resistance to sensitization and intergranular corrosion
in weldments and slower cooling sections. General
corrosion characteristics are similar to S30400
/ X 5 CrNi 18 10. Stability and toughness at cryogenic
temperatures is high.
Metallurgy:
The overall composition of the S304xx-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 older and higher carbon 18Cr, 8-10Ni type steels
are prone to sensitization and intergranular attack
in weld zones and slower-cooling sections. However,
the advent of AOD/VOD refining allowed easier production
of this less-sensitizable low-carbon (0.03% max) grade.
Reducing carbon content to 0.03% max C incurs about
a 10% loss of strength. However, this loss can be
offset by adding nitrogen (e.g. X2CrNiN 18 10 / UNS
S30453).
Composition:
| Element |
Minimum
(%) |
Maximum
(%) |
| Chromium |
17.00 |
19.00 |
| Nickel |
9.00 |
12.00 |
| Manganese |
- |
2.00 |
| Carbon |
- |
0.03 |
|
Similiar Specifications:
ISO 2604 46 / ISO 683/13 10
17-19%Cr, 9-12%Ni, <2%Mn, <0.03%C
EURONORM X2 CrNi 18 10
17.0-19.0%Cr, 9.0-12.0%Ni, <2.0%Mn, <0.03%C
ASTM UNS S30403 304L
18-20%Cr, 8-12%Ni, <0.10%N, <2.0%Mn, <0.03%C
BS 304S11
17-19%Cr, 9-12%Ni, <2.0%Mn, <0.03%C
DIN X2 CrNi 19 11 1.4306
18-20%Cr, 10-12.5%Ni, <2%Mn, <0.03%C
JIS SUS 304L
18-20%Cr, 9-13%Ni, <2%Mn, <0.03%C
Applications:
Components requiring substantial welding with resistance
to intergranular corrosion:
Dairy, food, brewing and chemical plant, eg. nitric acid Ship-tanks and landbased tankers for food,
beverages and some chemicals.
Membranes for shipboard tanks and land based storage of Liquid Natural Gas (-163°C).
Product Forms:
Plate, Sheet and Strip
ISO 2604 /4 P46
EURONORM X2
CrNi 18 10 88-86/2, 88-86/3, 141-79
ASTM UNS S30403
304L 167, 240, 480, 666
BS 304S11 1449/2, 1501/3
DIN X2 CrNi 19 11 1.4306 17440, 17441
JIS SUS 304L 4304, 4305, 4307
Bar and Long Products
EURONORM X2
CrNi 18 10 88-86/1
BS 304S11 970/1, 1502
DIN X2 CrNi 19 11 1.4306 17440
JIS SUS 304L 4303, 4308, 4318
Forgings and Others
ISO 2604 /1 F46
EURONORM X2
CrNi 18 10 88-86/1, 119-74
ASTM UNS S30403
304L 314, 473, 484, 182, 403, 744
BS 304S11 970/1, 1503
DIN X2 CrNi 19
11 1.4306 17440
JIS SUS 304L 3214, 4319
Tube and/or Pipe
ISO 2604 /2 TS46, /5 TW46
BS 304S11 3605
DIN X2 CrNi 19
11 1.4306 17455, 17456, 17457,
17458
JIS SUS 304L 3463, 3459
ASTM UNS S30403
304L 213, 249, 269, 270, 450, 511, 554, 632, 688,
778, 851
Pipe
ASTM UNS S30403
304L 312, 358, 409, 530, 813, 814
General
ISO 683/13 10
BS 304S11 5500
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Page Last Modified: 10/04/06 11:13
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