Duplex Steel UNS S32205 has high fatigue strength, especially at room temperature, where reverse bending stress is considered a problem. Since the fatigue limit of this alloy is comparable with its yield strength, it makes the alloy of considerable use for applications for which both properties are significant. Unlike conventional stainless steel alloys, the fatigue strength of Duplex Steel UNS S32205 does not depend as strongly on corrosion rate.
Our Duplex Steel UNS S32205 Fasteners have high strength both at nominal and sub-zero temperatures. It is added to their strength against rigorous environmental conditions; thus, the process assures the customer of delivering fasteners on time with specified specifications.
Compared with 316 bolts, fasteners fabricated from Duplex 2205 exhibit higher strength with improved resistance to corrosion and SCC in chloride-containing atmospheres. This makes them an ideal choice for chemical, petrochemical, and offshore industries for service in seawater handling equipment, heat exchangers, and other critical components. In contrast, while 316 bolts have better pitting corrosion resistance and are less expensive, the performance of main Duplex 2205 fasteners comes out on top in more demanding environments.
S32205 Duplex Steel ASTM A182 Fasteners Equivalent Grades
STANDARD | UNS | WNR. |
---|---|---|
Duplex Steel 2205 | S31803 / S32205 | 1.4462 |
Chemical Alloyion of Duplex Steel S32205 Industrial Fasteners
Grade | Common Name | C% | Mn% | Si% | P% | S% | Cr% | Ni% | Mo% | N% |
---|---|---|---|---|---|---|---|---|---|---|
2205 | S31803 | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
S32205 | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 |
Mechanical Properties Of S32205 Duplex Steel Bolts & Nuts
Tensile Strength, ksi | 90 min |
---|---|
0.2% Yield Strength, ksi | 65 min |
Elongation, % | 25 min |
Hardness [HRC] | 293 max |
Physical Properties of UNS S32205 Duplex Stainless Steel Fasteners
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 |
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