Forging Brass UNS C37700

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Welding
     Forging
     Hot Working
     Cold Working
     Annealing
Applications

Introduction

Brass is an alloy mainly consisting of copper and zinc. Brass alloys can be easily shaped and are available in various colors. Brass has high thermal conductivity. UNS C37700 forging brass alloys have good forgeability. They are available in the form of rod.

The following datasheet gives details about UNS C37700 brass alloys.

Chemical Composition

The following table shows the chemical composition of UNS C37700 brass alloys.

Element Content (%)
Copper, Cu 58 - 61
Iron, Fe 0.3 (max)
Lead, Pb 1.2 - 2.5
Zinc, Zn Remainder

Physical Properties

The physical properties of UNS C37700 brass alloys are tabulated below.

Properties Metric Imperial
Density 8.44 g/cm³ 0.305 lb/in³
Melting point 883°C 1620°F

Mechanical Properties

The mechanical properties of UNS C37700 brass alloys are outlined in the following table.

Properties Metric Imperial
Hardness, Rockwell B (as drawn, extruded, cold drawn 18%, annealed 1h) 74 74
Hardness, Rockwell F (M30 temper) 78 78
Tensile strength (M30 temper) 360 MPa 52200 psi
Tensile strength (as drawn, extruded, cold drawn 18%, annealed 1h) 460 MPa 66700 psi
Yield strength (@ 0.500%, M30 temper) 140 MPa 20300 psi
Elongation at break (as drawn, extruded, cold drawn 18%, annealed 1h) 29% 29%
Elongation at break (in 50 mm, M30 temper) 45% 45%
Reduction of area (as drawn, extruded, cold drawn 18%, annealed 1h) 50% 50%
Elastic modulus 117 GPa 17000 ksi
Poisson's ratio 0.34 0.34
Machinability (UNS C36000 (free-cutting brass) = 100) 80 80
Shear modulus 39 GPa 5660 ksi

Thermal Properties

The thermal properties of UNS C37700 brass alloys are given in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@ 20-300°C/ 68.0-572°F) 20.7 µm/m°C 11.5 µin/in°F
Thermal Conductivity (@ 20°C/68°F) 120 W/mK 833 BTU in/hr.ft².°F

Other Designations

Other designations that are equivalent to UNS C37700 brass alloys include:

  • ASME SB283
  • ASTM B124
  • ASTM B283
  • SAE J461
  • SAE J463

Fabrication and Heat Treatment

Machinability

The machinability rating of UNS C37700 brass alloys is 80.

Welding

Brazing, soldering, and butt welding methods are preferred for welding UNS C37700 brass alloys. Spot welding, oxyacetylene welding, seam welding, coated metal arc welding, and gas shielded arc welding are not preferred for welding these alloys.

Forging

UNS C37700 brass alloys can be forged at temperatures ranging from 650 to 815°C (1200 to 1500°F). The hot forgeability rating of UNS C37700 brass alloys is 100.

Hot Working

UNS C37700 brass alloys have good hot forming capacity,

Cold Working

UNS C37700 brass alloys have poor cold working capacity.

Annealing

Annealing of UNS C37700 brass alloys can be done at temperatures ranging from 427 to 595°C (800 to 1100°F).

Applications

UNS C37700 brass alloys are used in the following applications:

  • Fittings
  • Specialty fasteners
  • Architectural hardware
  • Mechanical components

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