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Contact name:Vicky
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Duplex Stainless Steel Fasteners DIN 934 HEX NUT S31803 S32750 Bolt Nut Washer
1.Duplex 2205 Nuts
Duplex stainless steel nuts provide a higher strength of yield than typical austenitic stainless steel nuts. These complex SAF 2205 nuts also provide increased corrosion resistance and durability. Super duplex stainless steel 2205 nuts provide protection against crevice corrosion, pitting and numerous different types of corrosive cracking and wear. Furthermore, due to their solid heat resistance, duplex stainless steel nuts can be utilized in temperatures up to 570° F.
Alloy 2205 gets the name Duplex because it is composed of two different types of grains. 40-50% of its grain structure is austenite and 50-60% of it is ferrite. It is closely related to, but much more popular than Alloy 255. In most environments, it surpasses 317L in crevice corrosion resistance. Alloy 2205 excels in chloride environments and resists hydrogen sulfide. Alloy 2205 has almost twice the strength of 316L. Due to the lower nickel and molybdenum content, it is less costly than Alloy C276. Among the places where Alloy 2205 is used include pressure vessels, heat exchangers and scrubbing systems.
Material | Size | Length | Specification |
Duplex Stainless Steel
| M02 to M30 | 3 mm | IS BS ASTM |
Material: | Duplex Stainless Steel, Super Duplex Stainless Steel. |
Standard : | ASTM / ASME F60 / F51/ F61 / F55 / F53 |
Grade: | UNS S31803, S32205, S32550, S32750, S32760 |
Type of Fasteners: | Bolts : Bolts stud bolts, hex head bolts, socket hexagon head screw anchor bolts, u-bolts, J bolts, mushroom head square neck bolts, t- head bolts, wing screw, eye bolt, eye bolt, foundation bolts and structural bolts Washer : Plain washer , plain big & small OD washer , spring lock washer , spring washer heavy duty , tooth washer , star washer , tab washer with one & two tab Nuts : Hexagon nuts, hexagon coupling nuts, hexagon thin nut, square nut, hexagon castle nuts, self locking nut, hexagon domed cap nuts Screw : Pan head slotted screws, cheese head slotted screws, countersunk head slotted screws, countersunk raised head slotted screws, pan phillipse head screw, countersunk Phillipse raised head screws, slotted cheese trim head machine screws, socket head allen cap screws, allen countersunk socket head cap screws, socket head shoulder screws, socket head cap screw low head, hexagon socket set screw with flat point, hexagon socket set screws with cone point, hexagon socket set screw with dog point, hexagon socket set screws with dog point, hexagon socket set screws with cup point, imprial socket cap screws. Other : Threaded rod, as per drawing and customers spec. coating, hot dipped galvanizing, phosphate, Teflon, xylon, zinc, cadmium.
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In Form of: | Hex, Square, Round , Threading as per Gauge Etc. |
Chemical Composition
Typical compositional ranges for grade Duplex 2205 Nuts
| C | Mn | Si | P | S | Cr | Mo | Ni | N | |
|---|---|---|---|---|---|---|---|---|---|
| 2205 (S31803) | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 21.0 max: 23.0 | min: 2.5 max: 3.5 | min: 4.5 max: 6.5 | min: 0.08 max: 0.20 |
| 2205 (S32205) | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 22.0 max: 23.0 | min: 3.0 max: 3.5 | min: 4.5 max: 6.5 | min: 0.14 max: 0.20 |
Mechanical Properties
Typical mechanical properties for grade Duplex 2205 Nuts
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) | Hardness Rockwell C (HR C) |
|---|---|---|---|---|
UNS-S 31803 | 650-880 | 448 | 25 | |
UNS-S 32205 | 621 | 448 | 25 | 21 max |
Physical Properties
Typical physical properties for annealed grade Duplex 2205 Nuts
Density lbm/in3 | Electrical Resistivity mW•in | Thermal Conductivity (BTU/hr•ft•°F) | Heat Capacity BTU/lbm•°F | Electrical Resistivity (in x 10-6) | |
|---|---|---|---|---|---|
at 68°F | 0.278 | 27.6 | 8.7 | 0.112 | 33.5 |
at 212°F | 26.1 | 9.2 | 0.119 | 35.4 | |
at 392°F | 25.4 | 9.8 | 0.127 | 37.4 | |
at 572°F | 24.9 | 10.4 | 0.134 | 39.4 |
