ASTM F 879 : 2012
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
Hardcopy , PDF
09-10-2018
English
01-06-2012
1.1This specification covers the chemical and mechanical requirements for stainless steel inch hexagon socket button (SBHCS) and flat countersunk (SFHCS) head cap screws with nominal thread 0.060 through 0.625 in. intended for use in applications requiring general corrosion resistance.
1.2Two groups of austenitic stainless steel alloys and three conditions are covered. See Table 1 and Table 2.
| Alloy Group | Alloy | Full Size Product TestsA | Machined Specimen Tests | Core HardnessB | ||||
| Tensile | ExtensionC | Tensile | Yield | Elongation | Vickers | Rockwell | ||
| All | AF | 85 max | 0.6D | 85 max | 55 max | 40 | 210 max | 95 HRB max |
| All | CW | 80 min | 0.4D | 80 min | 40 min | 25 | 150 min | 50 HRA min |
| All | CW1 | 102 min | 0.4D | 87 min | 65 min | 20 | 220 min | 59 HRA min |
| Alloy Group | UNS Designation | Alloy | Composition, % maximum except as shown | ||||||||
| Carbon | Manganese | Phosphorus | Sulfur | Silicon | Chromium | Nickel | Copper | Molybdeneunm | |||
| Austenitic Alloys | |||||||||||
| 1 | S30400 | 304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0 to 20.0 | 8.0 to 10.5 | 1.00 | . . . |
| 1 | S30403 | 304L | 0.030 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0 to 20.0 | 8.0 to 12.0 | 1.00 | . . . |
| 1 | S30500 | 305 | 0.12 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0 to 19.0 | 10.5 to 13.0 | 1.00 | . . . |
| 1 | S38400 | 384 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 15.0 to 17.0 | 17.0 to 19.0 | . . . | . . . |
| 1 | S30430 | 18–9LW | 0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0 to 19.0 | 8.0 to 10.0 | 3.0 to 4.0 | . . . |
| 1 | S30433 | 302HQ | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0 to 19.0 | 8.0 to 10.0 | 3.0 to 4.0 | . . . |
| 2 | S31600 | 316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0 to 18.0 | 10.0 to 14.0 | . . . | 2.00 to 3.0 |
| 2 | S31603 | 316L | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0 to 18.0 | 10.0 to 14.0 | . . . | 2.00 to 3.0 |
1.3Units—The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.4The following precautionary caveat pertains only to the test method portion, Section 12, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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