Description
GB | 015Cr20Ni18Mo6CuN |
ISC | S31252 |
JIS | SUS 312L |
KS | |
ASTM | S31254 |
UNS | S31254 |
ISO | X1CrNiMoN 20-18-7 |
EN | X1CrNiMoCuN 20-18-7 |
W-Nr. | 1.4547 |
High molybdenum content and high chromium and nitrogen content make UNSS31254 have excellent spot and crevice corrosion resistance.The addition of copper improves corrosion resistance in some acids.In addition, due to its high nickel content and high chromium and molybdenum content, UNSS31254 has a good performance of stress corrosion cracking.
UNSS31254 alloy is a versatile material with many industrial applications:
- Petroleum and petrochemical equipment, such as bellows in petrochemical equipment.
- Pulp and paper bleaching equipment, such as pulp digester, bleaching equipment, filter scrubber barrel and press roller, etc.
- Power plant flue gas desulfurization device, mainly used parts: absorber tower body, flue, baffle plate, inner parts, spray system, etc.
- Offshore systems or seawater treatment, such as thin-walled condensation pipes cooled by seawater in power plants, desalination equipment, even in equipment where seawater may not flow.
- Desalination industry, such as salt production or desalting equipment.
- Heat exchangers, especially in the environment with chloride ions.
Chemical element content(%)
S31254 | Min% | Max% |
C | – | 0.02 |
Si | – | 0.8 |
Mn | – | 1 |
P | – | 0.03 |
S | – | 0.01 |
Cr | 19.5 | 20.5 |
Ni | 17.5 | 18.5 |
Cu | 0.5 | 1 |
Mo | 6 | 6.5 |
N | 0.18 | 0.22 |
Fastener type
BOLT | Hex bolt | DIN931(ISO 4014)
DIN933(ISO 4017) DIN961(ISO 8676) ANSI B18.2.1 JIS B1180 |
Hex flange bolt | DIN6921
ANSI B18.2.1 |
|
Carriage bolt | DIN603(ISO 8677)
ANSI B18.5 |
|
Eye bolt | DIN580
DIN444 |
|
Square head bolt | ASME B18.2.1
JIS B1182 |
|
T bolt | DIN186
JIS B1166 |
|
U bolt | DIN3570
IFI136 ASME B18.31.5 |
|
Anchor bolt | ASME B18.31.5
JB/ZQ 4363 JB/ZQ4364 |
|
SCREW | Hex socket screw | DIN912(ISO 4762)
DIN7984 DIN7991(ISO 10642) ISO 7380 ASME B18.3 |
Machine screw | DIN963(ISO 2009)
DIN964(ISO 2010) DIN965(ISO7046) DIN966(ISO7047) ANSI B18.6.3P ANSI B18.6.3F DIN84(ISO 1207) DIN85(ISO 1580) |
|
Set screw | DIN913(ISO 4026)
DIN914(ISO 4027) DIN915(ISO 4028) DIN916(ISO 4029 ) ANSI B18.3 |
|
Tapping screw | ISO7049
ISO 7050 JIS B1122T DIN7982 DIN968 |
|
Wooden screw | DIN571
ANSI B18.2.1 |
|
NUT | Hex nut | DIN 934(ISO 4032)
ANSI B18.2.2 ANSI B18.2.4 DIN 936(ISO 4035) DIN 439(ISO 4036) ISO 8674(UNI 5587) |
Hex flange nut | DIN6923(ISO 4161
ANSI B18.2.4.4M) IFI 145 |
|
Lock nut | DIN985
DIN982 DIN980 DIN6926 ANSI B18.16.6 |
|
Cover nut | DIN1587
DIN917 |
|
Square nut | DIN557
DIN562 ANSI N18.2.2 |
|
STUD | Stud | DIN975
DIN976 IFI136 |
WASHER | Flat washer | DIN125(ISO 7089/ISO 7090)
DIN126(ISO 7091) DIN9021(ISO 7093) ANSI B18.22.1 |
Spring washer | DIN127
DIN7980 |
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