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ASTM F835 Technical Data

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This specification covers the requirements for quenched and tempered alloy steel hexagon socket button and flat countersunk head cap screws.

Technical Data: ASTM F835 Chemical Requirements ASTM F835 Mechanical Requirements ASTM F835 Minimum Ultimate Tensile Loads

	Composition, %
Element	Heat Analysis	Product Analysis
Element	Heat Analysis	Product Analysis
Carbon	0.30 to 0.48	0.28 to 0.50
Phosphorus, max	0.035	0.040
Sulfur, max	0.040	0.045
Alloying elements	see 5.2	see 5.2

	Nominal Thread Size, in.
	0.500 and smaller	Over 0.500
	0.500 and smaller	Over 0.500
Full-size Screws:
Tensile, min, ksi	145	135
Machined Test Specimen:
Yield strength at 0.2 % offset, min, ksi	A	153
Tensile strength, min, ksi	A	170
Elongation in 4 D, min, %	A	8
Reduction of area, min, %	A	35
Product Hardness:
Rockwell C	39-44	37-44
Vickers DPH	382-434	363-434

^A not applicable

Thread Size		Stress Area, in.2		Button and Countersunk Heads, Tensile Load, min lbA


Coarse	Fine	Coarse	Fine	Coarse Thread Series	Fine Thread Series


	0.060-80		0.00180		260
0.073-64	0.073-72	0.00263	0.00278	380	400
0.086-56	0.086-64	0.00370	0.00394	540	570
0.099-48	0.099-56	0.00487	0.00523	710	760
0.112-40	0.112-48	0.00604	0.00661	880	960
0.125-40	0.125-44	0.00796	0.00830	1150	1200
0.138-32	0.138-40	0.00909	0.01015	1320	1470
0.164-32	0.164-36	0.0140	0.01474	2030	2140
0.190-24	0.190-32	0.0175	0.0200	2540	2900
0.250-20	0.250-28	0.0318	0.0384	4610	5275
0.3125-18	0.3125-24	0.0524	0.0580	7600	8450
0.375-16	0.375-24	0.0775	0.0878	11200	12700
0.4375-14	0.4375-20	0.1063	0.1187	15400	17000
0.500-13	0.500-20	0.1419	0.1599	20600	23200
0.625-11	0.625-18	0.226	0.258	30500	34500
0.750-10	0.750-16	0.334	0.373	45100	50700
0.875-9	0.875-14	0.462	0.509	62400	69200
1.000-8	1.000-12	0.606	0.663	81800	90400
1.125-7	1.125-12	0.763	0.858	103000	116400
1.250-7	1.250-12	0.969	1.073	131000	146000
1.375-6	1.375-12	1.155	1.315	156000	179000
1.500-6	1.500-12	1.405	1.581	190000	215000

^A Because of the head critical configuration of these parts, the full size tensile loads are based on 80 % of the minimum heat treated material strength (180 ksi for sizes 0.500 in. and smaller and 170 ksi for sizes larger than 0.500 in.) and the stress areas for coarse thread screws.