Beryllium Copper C17510 Class III

Copper Alloy No. C17510

Beryllium Copper , RWMA Class 3

Chemical Composition % by weight

Copper (incl. Silver)	Iron	Nickel	Cobalt	Silicon	Beryllium	Aluminum
97.8 Nominal	.10 Max	1.4 Min	.30 Max	.20 Max	.20 Min	.20 Max

Material Properties

Precipitation hardened alloy with good thermal conductivity and high hardness. Not suitable for case hardening or nitrating.

Applications

Hardware : Fuse clips, fasteners, springs, switch parts, relay parts, electrical conductors.
Industrial : Welding equipment.

Mechanical Properties

Typical for rod in HT temper

Hardness*	Rockwell F Scales	98
Tensile Strength**	KSI	115
Yield Strength **	KSI	110
Elongation**	% in 2 inch	14

*Hardness conversions are approximate

**Test values are nominal approximations and depend on specimen size and orientation.

Physical Properties

Thermal Conductivity	BTU/ (sq ft-ft-hr-F)	120-150
Specific Heat	BTU/lb/ºF @ 68F	.10
Thermal Expansion	Per °F from 68 F to 212 F	.0000098
Density	lb/cu in @ 68 F	.317
Electrical Conductivity	% IACS @ 68 F	45-48
Modulus of Elasticity	KSI	19,000

*Volume basis

Fabrication Practices

Capacity for being cold worked	Excellent
Capacity for being hot formed	Good
Hot forgeability rating (forging brass=100)	-
Hot working temperature	1200-1625 F or 650-765 C
Machinability rating (Free Cutting Brass=100)	-
Solution heat treating temperature	1675-1725 F or 900-950 C
Suitability for being joined by:	Soldering/Good
	Brazing/Good
	Oxyacetylene Welding/Not Recommended
	Gas Shielded Arc Welding/Fair
	Coated Metal Arc Welding/Fair
Resistance Welding	Spot/Good
	Seam/Fair
	Butt/Fair

The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.

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