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ASTM International - ASTM F879-12

Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws

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Organization: ASTM International
Publication Date: 1 June 2012
Status: inactive
Page Count: 7
ICS Code (Bolts, screws, studs): 21.060.10
scope:

1.1 This 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.

1.2 Two groups of austenitic stainless steel alloys and three conditions are covered. See Table 1 and Table 2.

TABLE 1 Mechanical Property Requirements

Alloy Group Alloy
Condition
Full Size Product Tests

A

Machined Specimen Tests Core Hardness

B

Tensile
Strength ksi
Extension

C
min

Tensile
Strength ksi
Yield
Strength ksi
Elongation
% min
Vickers Rockwell
All    AF    85 max 0.6

D

   85 max 55 max 40 210 max 95 HRB max
All    CW    80 min 0.4

D

   80 min 40 min 25 150 min 50 HRA min
All    CW1   102 min 0.4

D

   87 min 65 min 20 220 min 59 HRA min

A Actual full-size testing of condition CW and CW1 may result in decreased tensile strength because of the head configuration (see Table 3). For fasteners with nominal thread diameters larger than 0.625 in., the mechanical properties shall be agreed upon between the user and manufacturer.B Core hardness is only required when full-size product testing cannot be accomplished.C D denotes nominal thread size.TABLE 2 Chemical Requirements

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

1.3 Units-The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 The 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.

abstract:

This specification covers the chemical and mechanical requirements for stainless steel metric hexagon socket button (SBHCS) and flat countersunk (SFHCS) head cap screws with nominal thread M 3... View More

Document History

April 1, 2020
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
1.1 This 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...
May 1, 2015
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
1.1 This 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...
ASTM F879-12
June 1, 2012
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
1.1 This 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...
May 1, 2010
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
1.1 This 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...
May 1, 2008
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
1.1 This 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...
October 10, 2002
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
1.1 This 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...
June 10, 2002
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
1.1 This 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...
October 10, 2001
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
1.1 This 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...
October 10, 2001
Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
1.1 This 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...
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