China manufacturer of A193 B8MLCuN Class 1A UNS S31254 STUD BOLT and Heavy Hex Nuts
ASTM A193 Grade B8MLCuN is a stainless steel grade for high-strength, corrosion-resistant, stainless steel fasteners used in high-temperature and high-pressure applications:
A193 B8MLCuNA is Made from UNS S31254 or Alloy 254SMO stainless steel, with molybdenum, copper, nitrogen, and low carbon content
Stainless steel grade 254 SMO™ is a very high end austenitic stainless steel. It is designed with a combination of impact toughness resistance to chloride stress corrosion cracking, and pitting and crevice corrosion with strength that is twice that of the stainless steel 300 series.
For certain applications, grade 254 SMO™ has been reported to be a cost-effective substitute for high nickel and titanium alloys. It is known to possess excellent workability as well.
Chemical Composition
| Element | Austenitic Stainless Steel |
|---|---|
| UNS S31254 / Alloy 254SMO / 1.4547 | |
| CompositionA, % | |
| Carbon | 0.02 max |
| Manganese | 1.00 |
| Phosphorus | 0.030 max |
| Sulfur | 0.010 max |
| Silicon | 0.80 max |
| Chromium | 19.50 – 20.50 |
| Nickel | 17.50 – 18.50 |
| Molybdenum | 6.00 – 6.50 |
| Nitrogen | 0.18 – 0.22 |
| Copper | 0.50 – 1.00 |
AThe intentional addition of Bi, Se, Te, and Pb is not permitted.
254SMO IS A KIND OF SUPER AUSTENITIC STAINLESS STEEL WITH HIGH CORROSION RESISTANCE. IT IS DEVELOPED FOR HALIDE AND ACID ENVIRONMENTS AND IS WIDELY USED IN HARSH ENVIRONMENTS SUCH AS HIGH CONCENTRATION CHLORIDE ION MEDIA AND SEAWATER. IN VARIOUS INDUSTRIAL OCCASIONS IN ACIDIC MEDIA, ESPECIALLY IN ACIDS CONTAINING HALIDES, 254SMO IS FAR SUPERIOR TO OTHER STAINLESS STEELS, AND IN SOME CASES COMPARABLE TO HASTELLOY AND TITANIUM. LOW CARBON CONTENT AND HIGH MOLYBDENUM CONTENT MAKE IT HAVE BETTER RESISTANCE TO PITTING CORROSION AND CREVICE CORROSION, AND EXCELLENT RESISTANCE TO INTERGRANULAR CORROSION. WIDELY USED.
ASTM A479 UNS S31254 Hex Bolts Mechanical Properties
| Grade | SMO 254 |
|---|---|
| Yield Strength (0.2%Offset) | 300 |
| Tensile Strength | 650 |
| Density | 8.0 g/cm3 |
| Elongation | 35% |
| Melting Point | 1320-1390°C |
Our fasteners product range:
| Type | Stud Bolt | Hex Bolt (full thread, partial thread) | Threaded Rod |
| U-Bolt | Hex Socket Cap Screw | Hex Nut | |
| Flat Washer | Spring Washer | ||
| Size | Stud Bolt | DIN: M6~M100 | ASME: 1/4″~4″ |
| Hex Bolt | DIN: M6~M64 | ASME: 1/2″~2 1/2″ | |