Gun Metal Casting

Gun Metal Casting

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

Grade B.S. 1400: 1985	Nominal Composition	2% PS N/mm Min	Tensile Strength N/mm Min	Elongation % Min	Brinell Hardness Min
Gunmetal
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

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