ASTM A593 Specification
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ASTM F593 covers the chemical and mechanical requirements for stainless steel bolts, hex cap screws and studs in diameters ranging from 1/4″ to 1-1/2″ inclusive. These fasteners are for general purpose usage, and are available in seven alloy groups. Below is a basic summary of the common grades within the ASTM F593 specification. A number of other less common grades of ASTM F593 exist, but are not detailed in the description below. The Mechanical table here is limited to Alloy groups 1 and 2, as those are the most common and the Chemical table is only showing the most common alloy grades used for their respective alloy groups

 

ASTM F593 Specification covers Stainless Steel hex Cap Screw,hex Bolts,Studs etc for general purpose applications.JF engg Manufactures & supplies Bolt Fasteners as per F593 specification.

 

For quick Quote/Information on  F593 Bolts/Studs, please Contact Us

 

 

Alloy Group Information

 

Group	Alloy Grades	Condition	Family Type
1	304,305,384,304L,XM1,18-9LW, 302HQD	Cold Worked ( CW )	Austenitic
2	316, 316 L	Cold Worked ( CW )	Austenitic
3	321, 347	Cold Worked ( CW )	Austenitic
4	430E	Cold Worked ( CW )	Ferritic
5	410F	Hardened & Tempered ( H )	Martensitic
6	431	Hardened & Tempered ( H )	Martensitic
7	630	Age Hardened ( AH )	Precipitation Hardening
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
Sizes 0.75 in. and larger may be hot worked and solution annealed.
When approved by the purchaser, Alloys 303, 303Se, or XM1 may be furnished.
When approved by the purchaser, Alloy 430F may be furnished.
When approved by the purchaser, Alloys 416 or 416Se may be furnished.

 

Material Chemical Composition

 

Element	Group 1 ( AISI 304 )	Group 2 ( AISI 316 )
Carbon	0.08%	0.08%
Manganese, min	2.00%	2.00%
Phosphorus, max	0.045%	0.045%
Sulfur, max	0.030%	0.030%
Silicon	1.00%	1.00%
Chromium	18.0 to 20.0%	16.0 to 18.0%
Nickel	8.0 to 10.5%	10.0 to 14.0%
Copper	1.00%
Molybdenum		2.00 to 3.00%

 

Mechanical Properties for Most Commonly Used Alloy Group

 

Alloy Group	Condition	Marking	Size Range	Tensile, ksi	Yield, ksi (Min)	Rockwell Hardness
1	0.33 - 0.40%	F593A	1/4 to 1-1/2	65 to 85	20	B85 max
	0.90 - 1.20%	F593B	1/4 to 1-1/2	75 to 100	30	B65 to 95
	0.035% max	F593C	1/4 to 5/8	100 to 150	65	B95 to C32
	0.040%	F593D	3/4 to 1-1/2	85 to 140	45	B80 to C32
2	0.15 - 0.35%	F593E	1/4 to 1-1/2	65 to 85	20	B85 max
	0.25 - 0.45%	F593F	1/4 to 1-1/2	75 to 100	30	B65 to 95
	0.25 - 0.45%	F593G	1/4 to 5/8	100 to 150	65	B95 to C32
	0.45 - 0.65%	F593H	3/4 to 1-1/2	85 to 140	45	B80 to C32

 

Recommended Nuts & Washer

 

Nuts			Washers
F594			SS304 / SS 316

 

 

 

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