Copper alloys

Cu - Alloy (bronze) are alloys based on copper with aluminum, tin or silicon, often with alloying elements of iron, nickel and manganese. These alloys are mainly used in shipbuilding, mining, pulp and paper industry and the chemical industry, wherever a wear-resistant, low friction weld surface is required.

Brochure

Chemical composition (average values in % of the welding consumable)

ALUNOX	Mat. No.	EN 14640	AWS / ASME SFA - 5.7	Cu	Sn	Al	Fe	Si	Mn	Ni	Zn	AS	Pb	P	Others
Standard dimensions and standard rinses from stock - Special designs on request
CuSn	2.1006	Cu 1898	ER-Cu	Rem.	0,5-1,0	0,01	0,05	0,5	0,1 -0,5	0,3	-	0,05	0,02	0,02	0,1
Cu Sn 6	2.1022	Cu 5180	ER-CuSn-A	Rem.	4,0-7,0	0,01	0,01				0,1		0,02	0,01-0,4	0,4
CuSn 12	2.1056	Cu 5410	-	Rem.	11,0–13,0	0,01	0,1				0,1		0,02	0,04	0,4
CuSi 3	2.1461	Cu 6560	ER-CuSi-A	Rem.	0,2	0,01	0,5	2,8–4,0	3,0		0,2		0,02	0,02	0,4
CuAl 8	2.0921	Cu 6100	ER-CuAl-A1	Rem.	-	6,0–9,5	0,5	0,2		0,8	0,2		0,02		0,4
CuAl 8 Ni2	2.0922	Cu 6327	-	Rem.	-	7,0–9,5	0,5–2,5	0,2	2,2	0,5–3,0	0,2		0,02		0,4
CuAl8 Ni6	2.0927	Cu 6328	ER-CuNiAI	Rem.	-	8,5–9,5	3,0–5,0	0,2	0,8	4,0–6,0				0,02	0,4
CuAl 9 Fe	2.0932	-	ER-CuAI-A2	Rem.	-	9,0–11,5	0,5–1,5	max. 0,1		max. 1,0	0,02			0,02	0,4
CuAg	2.1211	-		Rem.					max. 1,0

Mechanical properties of the untreated weld material (average values) at room temperature [20°C]

ALUNOX	Mat. No.	Tensile Strength Rm (N/mm²)	Yield Strength (N/mm²)	Stretching limit %	Hardness HB
CnSn	2.1006	220		30	60
Cu Sn 6	2.1022	300	150	20	80
CuAl 8	2.0921	430	200	40	100
CuSi 3	2.1461	360	150	40	80
CuSn 12	2.1056	350	200	30	100
CuAl 8 Ni 2	2.0922	530	270	30	140
CuAl 9 Ni 5 FE	2.0923	500	380	10	150
CuAl 9 Fe	2.0937	430	200	40	100
CuAg	2.1211	220	680	18	60