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Copper Nickel

Copper-nickel alloys, also known as cupronickel alloys, represent a remarkable fusion of two metals renowned for their individual properties. These alloys typically contain varying percentages of copper and nickel, along with small amounts of other elements such as iron and manganese, to achieve specific performance characteristics. Copper-nickel alloys are highly valued for their exceptional resistance to corrosion, particularly in marine environments, making them indispensable in various applications ranging from shipbuilding and offshore structures to coinage and heat exchangers. One of the primary advantages of copper-nickel alloys is their outstanding resistance to corrosion, erosion, and biofouling in seawater.

This property makes them ideal for marine applications where exposure to saltwater and marine organisms can lead to rapid deterioration of conventional materials. As a result, copper-nickel alloys are extensively used in ship hulls, offshore platforms, seawater piping systems, and desalination plants, where durability and longevity are paramount. Moreover, copper-nickel alloys exhibit excellent mechanical properties, including high strength, ductility, and thermal conductivity.

ASTM B111 / B466 / B467 / B552 / B543
Buttweld Pipe Fittings, Forged Fittings, Flanges, Pipes, Tubes, Round Bar, Sheets, Fasteners, Gaskets

copper nickel products

Buttweld Fitting

Forged Fitting

Flanges

Pipes

GENERAL INFORMATION

CHEMICAL COMPOSITION
MECHANICAL COMPOSITION

Family	CDA	AMS	UNS	Cu [%]	Sn [%]	Pb [%]	Zn [%]	Ni [%]	Fe [%]	Al [%]	Other [%]
Red brass	833		C83300	93	1.5	1.5	4
			C83400[8]	90			10
	836	4855B	C83600	85	5	5	5
	838		C83800	83	4	6	7
Semi-red brass	844		C84400	81	3	7	9
	845		C84500	78	3	7	12
	848		C84800	76	3	6	15
Manganese bronze			C86100[9]	67	0.5		21		3	5	Mn 4
	862†		C86200	64			26		3	4	Mn 3
	863†	4862B	C86300	63			25		3	6	Mn 3
	865	4860A	C86500	58	0.5		39.5		1	1	Mn 0.25
Tin bronze	903		C90300	88	8		4
	905	4845D	C90500	88	10	0.3 max	2
	907		C90700	89	11	0.5 max	0.5 max
Leaded tin bronze	922		C92200	88	6	1.5	4.5
	923		C92300	87	8	1 max	4
	926	4846A	C92600	87	10	1	2
	927		C92700	88	10	2	0.7 max
High-leaded tin bronze	932		C93200	83	7	7	3
	934		C93400	84	8	8	0.7 max
	935		C93500	85	5	9	1	0.5 max
	937	4842A	C93700	80	10	10		0.7 max
	938		C93800	78	7	15		0.75 max
	943	4840A	C94300	70	5	25		0.7 max
Aluminium bronze	952		C95200	88					3	9
	953		C95200	89					1	10
	954	4870B 4872B	C95400	85					4	11
			C95410[10]	85					4	11	Ni 2
	955		C95500	81				4	4	11
			C95600[11]	91						7	Si 2
			C95700[12]	75				2	3	8	Mn 12
	958		C95800	81				5	4	9	Mn 1
Silicon bronze			C87200[13]	89							Si 4
			C87400[14]	83			14				Si 3
			C87500[15]	82			14				Si 4
			C87600[16]	90			5.5				Si 4.5
	878		C87800[17]	80			14				Si 4
			C87900[18]	65			34				Si 1

Family	CDA	Tensile strength [ksi]		Yield strength [ksi]		Elongation (typ.) [%]	Hardness [Brinell 10 mm-500 kg]	Machinability [YB = 100]
Family	CDA	Min.	Typ.	Min.	Typ.	Elongation (typ.) [%]	Hardness [Brinell 10 mm-500 kg]	Machinability [YB = 100]
Red brass	833		32		10	35	35	35
	836	30	37	14	17	30	50–65	84
	838	29	35	12	16	25	50–60	90
Semi-red brass	844	29	34	13	15	26	50–60	90
Semi-red brass	848	25	36	12	14	30	50–60	90
Manganese bronze	862	90	95	45	48	20	170–195†	30
	863	110	119	60	83	18	225†	8
	865	65	71	25	28	30	130†	26
Tin bronze	903	40	45	18	21	30	60–75	30
	905	40	45	18	22	25	75	30
	907	35	44	18	22	20	80	20
Leaded tin bronze	922	34	40	16	20	30	60–72	42
	923	36	40	16	20	25	60–75	42
	926	40	44	18	20	30	65–80	40
	927	35	42		21	20	77	45
High-leaded tin bronze	932	30	35	14	18	20	60–70	70
	934	25	32		16	20	55–65	70
	935	25	32	12	16	30	55–65	70
	936	33	30	16	21	15	79-83	80
	937	25	35	12	18	20	55–70	80
	938	25	30	14	16	18	50–60	80
	943	21	27		13	10	42–55	80
Aluminium bronze	952	65	80	25	27	35	110–140†	50
	953	65	75	25	27	25	140†	55
	954	75	85	30	35	18	140–170†	60
	955	90	100	40	44	12	180–200†	50
	958	85	95	35	38	25	150-170†	50
Silicon bronze	878	80	83	30	37	29	115	40
† Brinell scale with 3000 kg load