Gun Metal Technical Information

Gun Metal

It has a tensile strength of 221 to 310 MPa, a specific gravity of 8.7, a density of 8,719 kg/m3, and a Brinell hardness of 65 to 74.The main alloys used in Gunmetal castings are -LG2, LG3, LG4, PB, LPB, HTB. A material with excellent machining characteristics, good casting qualities, and moderate strength. Particularly suitable where pressure tightness is required.

GRADE

GRADE BSS / ISS

NOMINAL COMPOSITION
[Cu / TIN / Zn / Pb]

TENSILE STRENGTH
Kg/mm2

ELONG
ATION
“% ON 2”

BRINELL HARDNESS

GUN METAL

BS1400 G1-C / ISS 306 Grade I
BS1400 G2-C / ISS 306 Grade II
BS1400 G3-C / ----

88 / 10 / 2
88 / 8 / 4
85 / 7 / 2.5 / Ni 5.5

26 – 34
25 – 32
28 - 34

15 – 25
15 – 25
18 - 25

70 – 95
70 – 90
70 - 95

BS1400 LG1-C / ---
BS1400 LG2-C / ISS 318 LTB 2
BS1400 LG3-C/ ISS 318 Grade 1
BS1400 LG4-C / ISS 318 LTB 1

83 / 3 / 9 / 5
85 / 5 / 5 / 5
86 / 7 / 5 / 2
88 / 7 / 2 / 3

17 – 22
19 – 26
22 – 31
25 - 32

12 – 15
15 – 25
12 – 25
18 - 25

55 – 65
65 – 75
70 – 85
70 – 85

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