ASTM F2281 Alloy 321 Threaded Rods, ASTM A182 F2281 Alloy 321 Studs, ASTM F2281 Alloy 321 Nuts, ASTM F2281 Alloy 321 Bolts, ASTM F2281 Alloy 321 Screws Supplier in Mumbai, India.
The ASTM F2281 standard specifies the chemical and mechanical requirements for stainless steel and nickel alloy bolts, hex cap screws, and studs with a diameter of 1/4 inch or larger that are intended for use at temperatures up to 1800°F (982°C) and in applications requiring heat resistance and high temperature effects. This standard includes a wide range of materials that may be used at high temperatures, as well as environmental requirements such as corrosive circumstances, due to particular alloy qualities. The specifications A276, A484/A484M, A493, A564/A564M, A582/A582M, and B637 are solely provided as material sources for making bolts, hex cap screws, and studs to this specification.
Chemical Composition
| Alloy |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Cu |
Mo |
Other |
| ASTM F2281 321 Type II |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
17.0-19.0 |
9.0-12.0 |
. . . |
. . . |
Ti5 × C min |
Mechanical Properties
| Alloy Grades |
Condition |
Marking |
Nominal Diameter, in. |
Full-Size Tests |
Rockwell Hardness |
Machined Specimen Tests |
| Tensile Strength, min, ksi |
Yield Strength, min, ksi |
Tensile Strength, min, ksi |
Yield Strength, min, ksi |
Elongation 4D, min % |
| ASTM F2281 321 Type II, Class A |
A |
F2D |
All diameters |
75 |
30 |
85 to 95 HRB |
75 |
30 |
30 |
| CWA |
F2E |
All diameters |
75 |
30 |
65 to 95 HRB |
75 |
30 |
20 |
| HWA |
F2F |
All diameters |
75 |
30 |
65 to 95 HRB |
75 |
30 |
30 |