ASTM F468/F468M UNS C26000 Brass Bolts, Stud Bolts

ASTM F468/F468M UNS C26000 Brass Bolts, Stud Bolts

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ASTM F468 UNS C26000 represents grade specification for Brass Grade C26000 Bolts, Screw Fasteners. It covers both coarse and fine threaded Brass bolts, screws, stud bolts. Below is the chemical, mechanical and other requirements. ASTM F468 UNS C26000 Fasteners carry EN 10204 Type 3.1 Certification.

ASTM F468 UNS C26000 Chemical Requirements

Composition, %Copper and Copper Base Alloys
UNS Designation	Alloy	General Name	Aluminum	Copper, min	Iron, max	Manganese, max	Nickel, max	Phosphorus	Silicon	Zinc, maxA	Lead, max	Tin	Arsenic, max
C26000	260	Brass	--	68.5 - 71.5	0.05	--	--	--	--	balance	0.07	--	--

A Elements shown as balance shall be arithmetically computed by deducting the sum of the other named elements from 100. B Copper plus specified elements = 99.8 min; copper plus silver = 88.5-91.5. C Cobalt is to be counted as nickel D Minimum content of copper plus all other elements with specified limits shall be 99.5%. E An alloy containing as high as 2.5% silicon is acceptable provided the sum of all the lements other than copper, silicon and iron does not exceed 0.30 %.

ASTM F468 UNS C26000 Mechanical Requirements

Alloy	Mechanical Property Marking	Nominal Thread Diameter, inch	HardnessA	Full Size Tests B		Machined Specimen Tests
				Tensile Strength, min, ksi	Yield Strength, min, ksiC	Tensile Strength, min, ksi	Yield Strength, min, ksiC	Elongation in 4D, min %D
Copper
Cu 260	F 468AB	all	55 - 80 HRF	60 - 90	50	55	50	35

A where both tension and hardness tests are performed, the tension tests shall take precedence for acceptance purposes. For alumium and titanium alloys, hardness tests are for information only. B The yield tensile strength values for full size products shall be computed by dividing the yield and maximum tensile load by the stress area for the product diameter and thread pitch as given in table on tensile stress areads. C Yield strength is the stress at which an offset of 0.2% gauge length occurs. D Elongation is determined using a gauge length of 4 diameters of test specimen in accordance with Test Methods E8. E "HF" denoted a hot formed product F Aluminum alloy temper designations are in accordance with ANSI H35.1. G Full size test mechanical properties apply to fasteners with a maximum diameter of 76 mm. Mechanical properties of larger sections shall be negotiated between the material manufacturer and the fastener producer. H Ti 5 Class A requires wedge test tensile testing in accordance with section 6.6 & Ti 5.5 Class B requires wedge tensile testing in accordance with section 6.5.1 of ASTM F468.

Tensile Stress Areas and Threads per Inch

Nominal Size, inch.	Coarse Threads - UNC		Fine Threads - UNF		8 Thread Series - 8UN
	Threads / inch	Stress AreaA, in2	Threads / inch	Stress AreaA, in2	Threads / inch	Stress AreaA, in2
1/4	20	0.0318	28	0.0364	--	--
5/16	18	0.0524	24	0.0580	--	--
3/18	16	0.0775	24	0.0878	--	--
7/16	14	0.1063	20	0.1187
1/2	13	0.1419	20	0.1599
9/16	12	0.1820	18	0.2030
5/8	11	0.2260	18	0.2560
3/4	10	0.3340	16	0.3730
7/8	9	0.4620	14	0.5090
1	8	0.6060	12	0.6630
1 1/8	7	0.7630	12	0.8560	8	0.790
1 1/4	7	0.9690	12	1.0730	8	1.000
1 3/8	6	1.1550	12	1.3150	8	1.233
1 1/2	6	1.4050	12	1.5810	8	1.492

A Tensile stress areas are computed using the following formula: As = 0.7854 [D- (0.9743/n)]2 Where: As = Tensile stress area, in.2, D = Nominal size (basic major diameter), in., and, n = number of threads per inch.

Test Methods

Alloy	Test Method
Copper	E52, E54, E62, E75, E478