C75200 (ASTM B122) Alloy Data Specifications

Alloy C752 is an excellent choice for designers considering both functional and decoration applications. Offering a combination of strength, ductility and moderately high work-hardening rate C752 is widely used as both a deep drawing and spring alloy. The added advantage of having a silvery-white color almost identical to that of silver or stainless steel makes C752 valuable for a variety of applications including: flatware, jewelry, medallions and antimicrobial touch surfaces. For more information contact Olin Brass Market Development Engineering at 618-258-5255, OlinBrass.com or email us at info@olinbrass.com.

Chemical Composition

Copper1 63.0-66.5%
Nickel2 16.5-19.5%
Zinc Remainder
Iron 0.25% max
Lead 0.05% max
Manganese 0.50% max

1Copper includes Ag; Copper plus named elements, 99.5% min

2Nickel values includes Co

Physical Properties

  English Units Metrics Units
Density 0.316 lb/in3 @ 68oF 8.73 g/cm3
Thermal Conductivity 19 BTU-ft/ft2-hr-oF 33 W/moK
Electrical Resistivity 173 ohm circ mils/ft 28.7 microhm-cm
Electrical Conductivity (annealed) 6% IACS* 0.0348 megamho/cm
Modulus of Elasticity 18,000,000 psi 124 kN/mm2
Thermal Capacity (Specific Heat) 0.090 Btu/lb/Fo @ 68oF 377.1 J/kg - oC @ 20oC
Coeff. of Thermal Expansion
  68-572oF (20-300oC) 9.0 PPM/oF 16.2 PPM/oC

*International Annealed Copper Standard

Mechanical Properties

Temper1 Tensile Strength Yield Strength2 % Elongation2 Typical 90o Bend Formability GW/BW3
ksi N/mm2 ksi N/mm2
Annealed 53-63 365-435 25 170 35 - -
1/4 Hard 58-72 400-495 45 310 34 - 0.5
1/2 Hard 66-80 455-550 63 435 14 0.5 0.8
3/4 Hard 74-86 510-595 75 515 8 1.0 1.0
Hard 78-91 540-625 82 565 5 1.5 1.5
Extra Hard 86-98 595-675 91 625 3 2.0 2.0
Spring 90-101 620-695 93 640 1 min 4.0 4.0
Extra Spring 96 min 660 min 95 min 655 min 2 max

1Mechanical properties subject to change. All tempers listed are made to a Tensile Strength specification unless otherwise noted.
2Nominal Values

3DATA FOR REFERENCE ONLY. R/T = Bend Radius/Material Thickness <0.016" (0.4mm) thick, 11/16 (17.5mm) wide.