Home > Services & Resources > Fastener Specifications > ASTM F593 Technical Data

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 Properties ASTM 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.

Seven groups of stainless steel alloys are covered, including thirteen austenitic, two ferritic, four martensitic, and one precipitation hardening.

Group	Alloys	Condition^B
1	304, 305, 384, 304L, 18-19LW, 302HQD	(CW) cold worked^C
2	316, 316 L	(CW) cold worked^C
3	321, 347	(CW) cold worked^C
4	430E	(CW) cold worked^C
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.

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

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.

Alloy Group	UNS Designation	Alloy	Composition, % maximum except as shown
Alloy Group	UNS Designation		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.

				Full-Size Tests			Machined Specimen Tests
Stainless Alloy Group	Condition^B	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, %
Stainless Alloy Group	Condition^B	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
5 (410, 416, 416Se)	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
6 (431)	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.

ASTM F593 Technical Data

Alloy Groups

Chemical Composition

Condition

Chemical Properties

Mechanical Properties