Description:

Gunmetal, also called G Metal, variety of bronze, formerly used for ordnance. Modern admiralty gunmetal is composed of 88 percent copper, 10 percent tin, and 2 percent zinc and is used for gears and bearings that are to be subjected to heavy loads and low speeds. It withstands atmospheric, steam, and seawater corrosion and is suitable for valves, pump parts, and steam fittings. We are stockist it gun metal which are available in different sizes avoid grades such as leaded Gum metal ordinary own mfd. Etc.This are used for superior brass costing elbow, pipes, tapes, corks, other hydraulic fittings.

Chemical Composition

LTB-1
Standard: IS: 318-1981

Copper Alloys CU SN PB ZN FE NI AL SI SB Impurities
LTB-1 Rem. 6-8 2.5-3.5 1.5-3 0.3 2 0.01 0.01 0.3 0.7

LTB-2
Standard: IS: 318-1981

Copper Alloys CU SN PB ZN FE NI AL SI SB Impurities
LTB-2 Rem. 4-6 4-6 4-6 0.35 2 0.01 0.02 0.4 0.8

LG-1
Standard:BS 1400

Copper Alloys CU SN PB ZN FE NI P AL SI SB S BI Impurities
LG-1 Rem. 2-3.5 4-6 7-9.5 0.5 2 0.03 0.01 0.02 0.25 0.08 0.1 1

LG-2
Standard: BS 1400

Copper Alloys CU SN PB ZN FE NI AL SI SB BI Impurities
LG-2 Rem. 4-6 4-6 4-6 0.5 2 0.01 0.02 – 0.05 0.8

LG-4
Standard:BS 1400

Copper Alloys CU SN PB ZN FE NI AL SI SB BI Impurities
LG-4 Rem. 6-8.05 2.5-3.5 1.5-3 0.2 2 0.01 0.01 0.25 0.05 0.7

RG-5
Standard: DIN

Copper Alloys CU SN PB ZN FE NI P AL MN SI SB S
RG-5 84-86 4-6 4-6 4-6 0.2 2 0.03 0.01 0.1 0.01 0.25 0.06

RG-7
Standard: DIN

Copper Alloys CU SN PB ZN FE NI P AL MN SI SB S
RG-7 83-85 6.8-8 5.3-7 3.3-5 0.2 1-1.5 0.03 0.01 0.1 0.01 0.25 0.03

BC-1
Standard: JIS

Copper Alloys CU SN PB ZN FE NI P AL SI SB
BC-1 79-83 2-4 3-7 8-12 0.35 1 0.05 0.01 0.01 0.2

BC-2
Standard: JIS

Copper Alloys CU SN PB ZN FE NI P AL SI SB
BC-2 86-90 7-9 0-1 3-5 0.2 1 0.05 0.01 0.01 0.2

BC-6
Standard: JIS

Copper Alloys CU SN PB ZN FE NI P AL SI SB
BC-6 83-87 4-6 4-6 4-6 0.3 1 0.05 0.01 0.01 0.2

BC-7
Standard: JIS

Copper Alloys CU SN PB ZN FE NI P AL SI SB
BC-7 86-90 5-7 1-3 3-5 0.2 1 0.05 0.01 0.01 0.2

C83600
Standard: ASTM

Copper Alloys CU SN PB ZN FE NI P AL SI SB S
C83600 84-86 4.3-6 4-5.7 4.3-6 0.25 1 0.05 0.005 0.005 0.25 0.08

C84400
Standard: ASTM

Copper Alloys CU SN PB ZN FE NI P AL SI SB S
C84400 79-82 2.5-3.5 6-8 7-10 0.4 0.8 0.02 0.005 0.005 0.25 0.08

Physical Properties

Gunmetal

Grade B.S.
1400: 1985		 Nominal
Composition		 2% PS
N/mm Min		 Tensile Strength
N/mm Min		 Elongation
% Min		 Brinell
Hardness Min
G1/BC3 88/10/2 – 245 15 –
G1/BC2 88/8/4 – 245 20 –
LG1 88/3/9/5 85 180 15 60
LG2 85/5/5/5 90 200 13 60
LG3 86/7/5/2 – – – –
LG4 88/7/2/3 130 230 14 65
BC1 82/3/10/5 – 165 15 –
BC6 85/5/5/5 – 215 18 –