C35300

C35300 is recognized as the standard material for machining, boasting a machining index of 100%. These alloys not only excel in machining but are also well-suited for hot stamping when the forged components require extensive subsequent machining. They are especially recommended for applications where cold working with minimal reduction, such as knurling, is essential. Additionally, the ductility of this material renders it exceptionally suitable for crafting wires, rods, and sections.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu60.0063.00
Pb1.502.50
Fe0.15
Total Others0.50
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO ASTM B453 (AS PER TEMPER HO2)
Range (Inch) From To UTS Min (ksi) UTS Max (ksi) PS Min (ksi) Elongation Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia) 0.059 0.500 57 80 25 7 60 80
0.500 1.000 55 70 25 10 75 75
1.000 2.953 50 62 20 15 40 70
Hex (A/F) 0.118 0.500 57 80 25 7 60 80
0.500 1.000 55 70 25 10 50 75
1.000 2.756 50 62 20 15 40 70
Square (A/F) 0.118 0.500 57 80 25 7 60 80
0.500 1.000 55 70 25 10 50 75
1.000 2.362 50 62 20 15 40 70
Range (mm) From To UTS Min (MPa) UTS Max (MPa) PS Min (MPa) Elongation Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia) 1.5 12 395 555 170 7 60 80
12 25 380 485 170 10 75 75
25 75 345 425 140 15 40 70
Hex (A/F) 3 12 395 555 170 7 60 80
12 25 380 485 170 10 50 75
25 70 345 425 140 15 40 70
Square (A/F) 3 12 395 555 170 7 60 80
12 25 380 485 170 10 50 75
25 60 345 425 140 15 40 70
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1670
Melting Point – Solidus°F 1630
Density lb/cu in. at 68°F 0.306
Specific Gravity 8.47
Electrical Conductivity % IACS at 68°F 26
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 67
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.3
Modulus of Elasticity in Tension ksi 15000
Modulus of Rigidity ksi 5600
FABRICATION PROPERTIES 
Soldering Excellent
Brazing Good
Capacity for being hot worked Not Recommended
Gas Shielded Arc Welding Not Recommended
Coated Metal Arc Welding Not Recommended
Spot Weld Not Recommended
Seam Weld Not Recommended
Butt Weld Fair
Capacity for Being Cold Worked Fair
Capacity for Being Hot Formed Poor
Machinability Rating 90

C35300

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