Zhengzhou Huitong Pipeline Equipment Co.,Ltd.
Zhengzhou Huitong Pipeline Equipment Co., Ltd.
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Duplex Steel UNS S31803
ASTM A A479 / ASME SA A479 Duplex Steel Nuts, ASTM / ASME F60 hex nuts, Duplex Steel UNS S31803 High Tensile heavy hex nuts
Asiad Steels is one of the known manufacturers of ASTM A479 Duplex Steel UNS S31803 & UNS S32205 Nuts, which is the most widely used duplex (ferritic/austenitic) stainless steel grade. ASTM A479 Duplex Steel UNS S31803 Nuts has excellent general corrosion resistance in a wide variety of corrosive chemicals including seawater and industrial acids. Microstructures of ASME SA 479 Duplex Steel UNS S32205 Hex Nuts consist of a mixture of austenite and ferrite phases. As a result, it display properties characteristic of both austenitic and ferritic stainless steels. ASTM A479 Duplex Stainless Steel 1.4462 Heavy Hex Nuts has resistance to stress corrosion cracking which is of importance in many applications including hot water tanks, process plant, brewing tanks, and desalination plant. ASME SA 479 Duplex Steel UNS S31803 Lock Nutsis annealed at 1020-1070 Degree C (1868-1958 Degree F) and then water quenched.
Duplex Steel UNS S31803 & UNS S32205 Nuts Specification
| Material | Specification | Standards | Size | Length |
|
Duplex Steel
|
IS BS ASTM |
ASTM / ASME - A/ SA 479 / 479 | 3 mm to 200 mm |
M02 to M30 |
Duplex Steel UNS S31803 & UNS S32205 Nuts Chemical Composition
| Cr | N | Ni | C | Mn | Si | P | S | Mo | |
| S31803 | min: 21.0 max: 23.0 |
min: 0.08 max: 0.20 |
min: 4.5 max: 6.5 |
0.03 max |
2.0 max |
1.0 max |
0.03 max |
0.02 max |
min: 2.5 max: 3.5 |
Duplex Steel UNS S31803 & UNS S32205 Nuts Mechanical Properties
| Grade | Tensile Strength (MPa) min |
Elongation (% in 50mm) |
Yield Strength 0.2% Proof (MPa) min |
Hardness Rockwell C (HR C) |
| UNS-S 31803 | 650-880 | 25 | 448 | |
| UNS-S 32205 | 621 | 25 | 448 | 21 max |
Duplex Steel UNS S31803 & UNS S32205 Nuts Physical Properties
| Density lbm/in3 |
Electrical Resistivity mW•in |
Electrical Resistivity (in x 10-6) |
Heat Capacity BTU/lbm•°F |
Thermal Conductivity (BTU/hr•ft•°F) |
|
| at 68°F | 0.278 | 0.112 | 8.7 | 27.6 | 33.5 |
| at 212°F | 0.119 | 9.2 | 26.1 | 35.4 | |
| at 392°F | 0.127 | 9.8 | 25.4 | 37.4 | |
| at 572°F | 0.134 | 10.4 | 24.9 | 39.4 |
Duplex Steel UNS S31803 & UNS S32205 Nuts Grade Designation
| Duplex | Common Name | Related Specifications | ||
| European | UNS | ASTM/ASME | ||
| Duplex 2205/31803 | SAF 2205 ® | 1.4462 | S31803/S32205 | F51/F60 |