BS 2872:1989

Foreword
Committees responsible
Specification
Section one. Forging stock and forgings
1 Scope
2 Definitions
3 General requirements
4 Chemical composition
Section two. Forging stock
5 Material condition
6 Tensile properties
7 Resistance to dezincification (applicable to alloy
    CZ 132 only)
8 Tolerances on dimensions
9 Selection of test samples
10 Preparation of test samples
11 Retests for forging stock
Section three. Forgings
12 Material condition
13 Tensile properties
14 Residual stress
15 Resistance to dezincification (applicable to
    forgings in CZ 132 only)
16 Tolerances on dimensions
17 Selection and preparation of test samples
18 Retests for forgings
Appendices
A Information to be supplied by the purchaser
B Designations, nominal compositions and product forms
    specified for alloys in the BS 2870 to BS 2875
    series
C Conversion of stress units
D The rounding of numbers rule
E Methods for the determination of tensile properties
F Method of test to establish dezincification
    resistance of material designated CZ 132
G Method for the detection of residual stress by the
    mercurous nitrate test
H Quality tolerances for forgings
Tables
1 Chemical composition and tensile properties of
    coppers
2 Chemical composition and tensile properties of
    alloyed coppers
3 Chemical composition and tensile properties of
    brasses
4 Chemical composition and tensile properties of
    aluminium bronzes and copper-nickel alloys
5 Alloy groups for tolerances on forging stock
6 Dimensional tolerances for round forging stock
7 Nominal batch sizes (masses) for sampling forging
    stock
8 Nominal batch sizes (masses) for sampling forgings
9 Designations, nominal compositions and product forms
    specified for alloys in the BS 2870 to BS 2875
    series
10 Conversion of stress in N/mm2 to kgf/mm2, tonf/in2
    and lbf/in2
11 Quantity tolerances for forgings
Figure
1 Illustration of dezincification resistance test

Chemical composition, tensile properties and other characteristics for wrought and cast copper and copper alloy forging stock having a diameter greater than 6 mm and for forgings of these materials.