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Grade LG4
Corresponding Standard BS 1400-1985
Specification for copper alloy ingots and copper alloy and high conductivity copper castings
Classification Copper and Copper Alloys
Density 8.8 g/cm3
LG4 Chemical Element Composition Content (%)
  Component Fe Si P S Ni As Pb Al Zn Sn Bi Sb Other Total More
合金锭 Minimum Value - - - - - - 2.7 - 1.7 6 - - - Cu:余量；Fe+As+Sb≤0.4；Sn+0.5Ni:7~8
Maximum Value 0.2 0.01 0.02 0.1 2 0.15 3.5 0.01 3.2 8 0.05 0.25 0.7
  Component Fe Si Ni As Pb Al Zn Sn Bi Sb More
铸件 Minimum Value - - - - 2.7 - 1.5 6 - - Cu:余量；Fe+As+Sb≤0.4；Sn+0.5Ni:7~8
Maximum Value 0.2 0.01 2 0.15 3.5 0.01 3 8 0.05 0.25
"Other individual elements or other totals": The chemical composition includes elements not specified in the table. Analysis should only be conducted if these elements are suspected to be present, or if routine analysis suggests that their content may exceed the prescribed limits.
LG4 Mechanical Properties
condition Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
Castings; continuous casting ≥300 ≥130 ≥13
Castings; cold-hardening cast ≥250 ≥130 ≥5
Casting; sand casting ≥250 ≥130 ≥16
Castings; centrifugal casting ≥250 ≥130 ≥6
LG4 Corresponding Standards(Same grade name, different standards)
1 GB /T 3190-2020
(LG4) 1A97
2 BS 1400-1985
LG4
3 GB /T 3880.1-2012
(LG4) 1A97

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