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ASTM F593 TECHNICAL DATA

Order F593 304 Stainless Steel Hex Cap Screws Order F593 316 Stainless Steel Hex Cap Screws Order F593 316 Stainless Steel Hex Nuts

 

 

Technical Data:ASTM F593 Mechanical PropertiesASTM F593 Chemical Properties

This specification covers the requirements for stainless steel bolts, hex cap screws, and studs 0.25 to 1.50 in., inclusive, in nominal diameter in a number of alloys in common use and intended for service applications requiring general corrosion resistance. 

Alloy Groups

Seven groups of stainless steel alloys are covered, including thirteen austenitic, two ferritic, four martensitic, and one precipitation hardening.
Group Alloys ConditionB
1 304, 305,   384, 304L, 18-19LW, 302HQD (CW) cold workedC
2 316, 316 L (CW) cold workedC
3 321, 347 (CW) cold workedC
4 430E (CW) cold workedC
5 410E (H) hardened and  tempered
6 431 (H) hardened and  tempered
7 630 (AH) age hardened

 

A Unless otherwise specified on the inquiry and order, the choice of an alloy from
within a group shall be at the discretion of the fastener manufacturer (see 6.1).
B See 4.2 for options.
C Sizes 0.75 in. and larger may be hot worked and solution annealed, provided the
bolts comply with the cold worked (CW) mechanical property requirements.
D When approved by the purchaser, Alloys 303, 303Se, or XM1 may be furnished.
E When approved by the purchaser, Alloy 430F may be furnished.
F When approved by the purchaser, Alloys 416 or 416Se may be furnished.

Chemical Composition

Alloy Groups—It is the intent of this specification that fasteners shall be ordered by alloy group numbers, which include alloys considered to be chemically equivalent for general purpose use. The alloy groupings are shown as follows.
Group Alloys
1 304, 304 L, 305, 384, 18-19LW, 302HQA
2 316, 316 L
3 321, 347
4 430E
5 410E
6 431
7 630

Condition

The fasteners shall be furnished in the following conditions, unless specified to be furnished in one of the optional conditions.
Alloy Group Condition Furnished Unless Otherwise Specified Optional Conditions (must be specified)
1, 2, 3 CW AF, A, SH
4 CW A
5 H HT
6 H HT
7 AH none

 

A— Machined from annealed or solution-annealed stock thus retaining the
properties of the original material; or hot-formed and solution annealed.
AF— Headed and rolled from annealed stock and then reannealed.
AH— Solution-annealed and age-hardened after forming.
CW— Headed and rolled from annealed stock thus acquiring a degree of cold
work. Sizes 0.75 in. and larger may be hot-worked and solutionannealed.
H— Hardened and tempered at 1050°F (565°C) minimum.
HT— Hardened and tempered at 525°F (274°C) minimum.
SH— Machined from strain-hardened stock or cold-worked to develop the
specific properties.

Chemical Properties

Alloy Group UNS Designation Alloy Composition,   % maximum except as shown
  Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Copper Molybdenum Others
Austenitic Alloys
1 S30300 303 0.15 2.00 0.20 0.15 min 1.00 17.0 to 19.0 8.0 to 10.0   0.60 maxA  
1 S30323 303 Se 0.15 2.00 0.20 0.060 1.00 17.0 to 19.0 8.0 to 10.0     Se 0.15 min
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 304 L 0.03 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   0.50 maxA  
1 S20300 XM1 0.08 5.0 to 6.5 0.040 0.18 to 0.35 1.00 16.0 to 18.0 5.0 to 6.5 1.75 to 2.25    
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 3.00  
2 S31603 316 L 0.03 2.00 0.045 0.030 1.00 16.0 to 18.0 10.0 to 14.0   2.00 to 3.00  
3 S32100 321 0.08 2.00 0.045 0.030 1.00 17.0 to 19.0 9.0 to 12.0     Ti 5× C min
3 S34700 347 0.08 2.00 0.045 0.030 1.00 17.0 to 19.0 9.0 to 13.0     Cb+Ta 10 × C min
Ferritic Alloys
4 S43000 430 0.12 1.00 0.040 0.030 1.00 16.0 to 18.0        
4 S43020 430F 0.12 1.25 0.060 0.15 min 1.00 16.0 to 18.0     0.60 maxA  
Martensitic Alloys
5 S41000 410 0.15 1.00 0.040 0.030 1.00 11.5 to 13.5        
5 S41600 416 0.15 1.25 0.060 0.15 min 1.00 12.0 to 14.0     0.60 maxA  
5 S41623 416Se 0.15 1.25 0.060 0.060 1.00 12.0 to 14.0       Se 0.15 min
6 S43100 431 0.20 1.00 0.040 0.030 1.00 15.0 to 17.0 1.25 to 2.50      
Precipitation Hardening Alloy
7 S17400 630 0.07 1.00 0.040 0.030 1.00 15.0 to 17.5 3.0 to 5.0 3.0 to 5.0   Cb+Ta 0.15-0.45

 

A At manufacturer’s option, determined only when intentionally added.

Mechanical Properties

        Full-Size Tests Machined Specimen Tests
Stainless Alloy Group ConditionB Alloy   Mechanical Property Marking Nominal Diameter, in. Tensile   Strength, ksiC Yield   Strength, ksiD,C Rockwell   Hardness Tensile   Strength, ksiC Yield   Strength, ksiD,C Elongation, in 4D, %
Austenitic Alloys
1
(303, 304, 304 L, 305, 384, XM1, 18-19LW, 302HQ, 303Se)
 AF F593A 1⁄4 to 11⁄2, incl 65 to 85 20 B85 max 60 20 40
A F593B 1⁄4 to 11⁄2, incl 75 to 100 30 B65 to 95 70 30 30
CW1 F593C 1⁄4 to5⁄8, incl 100 to 150 65 B95 to C32 95 60 20
CW2 F593D 3⁄4 to 11⁄2, incl 85 to 140 45 B80 to C32 80 40 25
SH1 F593A 1⁄4 to5⁄8, incl 120 to 160 95 C24 to C36 115 90 12
                 
SH2 F593B 3⁄4 to 1, incl 110 to 150 75 C20 to C32 105 70 15
                 
SH3 F593C 11⁄8 to 11⁄4, incl 100 to 140 60 B95 to C30 95 55 20
SH4 F593D 13⁄8 to 11⁄2, incl 95 to 130 45 B90 to C28 90 40 28
2
(316, 316 L)
 AF F593E 1⁄4 to 11⁄2, incl 65 to 85 20 B85 max 60 20 40
A F593F 1⁄4 to 11⁄2, incl 75 to 100 30 B65 to 95 70 30 30
CW1 F593G 1⁄4 to5⁄8, incl 100 to 150 65 B95 to C32 95 60 20
CW2 F593H 3⁄4 to 11⁄2, incl 85 to 140 45 B80 to C32 80 40 25
SH1 F593E 1⁄4 to5⁄8, incl 120 to 160 95 C24 to C36 115 90 12
SH2 F593F 3⁄4 to 1, incl 110 to 150 75 C20 to C32 105 70 15
SH3 F593G 11⁄8 to 11⁄4, incl 100 to 140 60 B95 to C30 95 55 20
SH4 F593H 13⁄8 to 11⁄2, incl 95 to 130 45 B90 to C28 90 40 28
3
(321, 347)
 AF F593J 1⁄4 to 11⁄2, incl 65 to 85 20 B85 max 60 20 40
A F593K 1⁄4 to 11⁄2, incl 75 to 100 30 B65 to 95 70 30 30
CW1 F593L 1⁄4 to5⁄8, incl 100 to 150 65 B95 to C32 95 60 20
CW2 F593M 3⁄4 to 11⁄2, incl 85 to 140 45 B80 to C32 80 40 25
SH1 F593J 1⁄4 to5⁄8, incl 120 to 160 95 C24 to C36 115 90 12
SH2 F593K 3⁄4 to 1, incl 110 to 150 75 C20 to C32 105 70 15
SH3 F593L 11⁄8 to 11⁄4, incl 100 to 140 60 B95 to C30 95 55 20
SH4 F593M 13⁄8 to 11⁄2, incl 95 to 130 45 B90 to C28 90 40 28
Ferritic Alloys
4
(430, 430 F)
 AF F593X 1⁄4 to 11⁄2, incl 55 to 75 30 B85 max 50 25  
A F593N 1⁄4 to 11⁄2, incl 55 to 75 30 B85 max 50 25  
CW1 F593V 1⁄4 to5⁄8, incl 60 to 105 40 B75 to 98 55 35  
CW2 F593W 3⁄4 to 11⁄2, incl 55 to 100 30 B65 to 95 50 25  
Martensitic Alloys
5
(410, 416, 416Se)
 H F593P 1⁄4 to 11⁄2, incl 110 to 140 90 C20 to 30 110 90 18
HT F593R 1⁄4 to 11⁄2, incl 160 to 190 120 C34 to 45 160 120 12
6
(431)
 H F593S 1⁄4 to 11⁄2, incl 125 to 150 100 C25 to 32 125 100 15
HT F593T 1⁄4 to 11⁄2, incl 180 to 220 140 C40 to 48 180 140 10
Precipitation Hardening Alloys
7
(630)
 AH F593U 1⁄4 to 11⁄2, incl 135 to 170 105 C28 to 38 135 105 16

 

A Minimum values except where shown as maximum or as a range.
B Legend of conditions:
A—Machined from annealed or solution-annealed stock thus retaining the properties of the original material, or hot-formed and solution-annealed.
AF—Headed and rolled from annealed stock and then reannealed.
AH—Solution annealed and age-hardened after forming.
CW—Headed and rolled from annealed stock thus acquiring a degree of cold work; sizes 0.75 in. and larger may be hot worked and solution-annealed.
H—Hardened and tempered at 1050°F (565°C) minimum.
HT—Hardened and tempered at 525°F (274°C) minimum.
SH—Machined from strain hardened stock or cold-worked to develop the specified properties.
C The yield and tensile strength values for full-size products shall be computed by dividing the yield and maximum tensile load values by the stress area for the product
size and thread series determined in accordance with Test Methods F606 (see Table 4).
D Yield strength is the stress at which an offset of 0.2 % gage length occurs.