Nickel silver Strip · Metalle Schmidt GmbH

Nickel silver

Chemical Composition
Equivalents
Mechanical properties
Finishes
Tolerances

Designation			Chemical composition in % (mm)
Symbolic	Numerical	EN	Min. Cu	Max. Cu	Max. Fe	Max. Mn	Min. Ni	Max. Ni	Max. Pb	Max. Sn	Min. Zn	Others total max.
CuNi12Zn24	CW403J	EN 1654 / EN 1652	63.0	66.0	0.3	0.5	11.0	13.0	0.03	0.0	Rest	0.2
CuNi18Zn20	CW409J	EN 1654 / EN 1652	60.0	63.0	0.3	0.5	17.0	19.0	0.03	0.03	Rest	0.2
CuNi18Zn27	CW410J	EN 1654 / EN 1652	53.0	56.0	0.3	0.5	17.0	19.0	0.03	0.03	Rest	0.2

Designation			Approximate international equivalents
Symbolic	Numerical	EN	US	Japan (JIS)	China (GB)
CuNi12Zn24	CW403J	EN 1654 / EN 1652	C75700
CuNi18Zn20	CW409J	EN 1654 / EN 1652
CuNi18Zn27	CW410J	EN 1654 / EN 1652

MECHANICAL PROPERTIES EN 1652 / EN 1654

Designations			Tensile strength Rm		Conventional yield strength at 0.2% Rp_0.2	Elongation 1)		HV hardness
			N/mm²			A₅₀mm
Material		Metallurgical condition	min.	max.	N/mm²	for thicknesses up to 0.25 mm (inclusive)	for thicknesses above 0.25 mm	min.	max.
Symbolic	Numerical					min.	min.
		R360	360	430	(max. 230)	35	45	-	-
		H080	-	-	-	-	-	80	110

		R430	430	510	(min. 230)	8	15	-	-
		H110	-	-	-	-	-	110	150

CuNi12Zn24	CW403J	R490	490	580	(min. 400)	5	8	-	-
		H150	-	-	-	-	-	150	180
						-	-
		R550	550	640	(min. 480)	-	3	-	-
		H170	-	-	-	-	-	170	200
						-	-
		R620	620	710	(min. 580)	-	2	-	-
		H190	-	-	-	-	-	190	220
		R380	380	450	(max. 250)	27	37	-	-
		H085	-	-	-	-	-	85	115

		R450	450	520	(min. 250)	9	18	-	-
		H115	-	-	-	-	-	115	160

CuNi18Zn20	CW409J	R500	500	590	(min. 410)	3	5	-	-
		H160	-	-	-	-	-	160	190

		R580	580	670	(min. 510)	-	2	-	-
		H180	-	-	-	-	-	180	210

		R640	640	730	(min. 600)	-	-	-	-
		H200	-	-	-	-	-	200	230
		R390	390	470	(max. 280)	30	40	-	-
		H090	-	-	-	-	-	90	120

		R470	470	540	(min. 280)	11	20	-	-
		H120	-	-	-	-	-	120	170

CuNi18Zn27	CW410J	R540	540	630	(min. 450)	3	5	-	-
		H170	-	-	-	-	-	170	200

		R600	600	700	(min. 550)	-	2	-	-
		H190	-	-	-	-	-	190	220

		R700	700	800	(min. 660)	-	-	-	-
		H220	-	-	-	-	-	220	250

NOTE - The numbers in brackets are not requirements of the standard and are given for information purposes only.
1) The values shown are for guidance purposes and are based on EN 1652 and EN 1654

BARE MATERIAL

The strips must be clean and free of detrimental defects, which must be specified by agreement between the customer and the supplier when requesting the quote and in the order. Normally, a small residual layer of lubricant is left on cold-rolled products, which is authorised unless otherwise specified.

ROUGHNESS EN 1654

This must be agreed between the customer and the supplier when requesting the quote and confirming the order.

SURFACE CONDITION EN 13599

The strips must be clean and free of detrimental defects, which must be specified by agreement between the customer and the supplier in the request for quotes and in the order. Normally, a small residual layer of lubricant is left on cold-drawn products, and this is acceptable unless otherwise specified. Discolouration is acceptable, provided that it is not detrimental to the use of the product.

TIN COATINGS

Tin coatings for strips and copper strips and copper alloys:

Type of coating	Standard
Electrolytic	EN 14436
Hot dip	EN 13148

ELECTROLYTIC EN 14436

ELECTROLYTIC TIN PROCESS TYPES AND TYPES OF TIN COATINGS AND TIN ALLOYS EN 14436

Process	Description
Process for matt electrolytic coatings.	This is the standard finish of a traditional electrolytic bath.
Process for bright electrolytic coatings.	Coatings with a bright appearance are obtained using baths that contain one or more suitable brightening agents (brighteners). Their presence may not be desirable in subsequent melting or soft soldering processes. Furthermore, they may be beneficial for frictional properties (low friction or sliding contacts).
Process for flow-brightened electrolytic coatings.	Flow-brightened electrolytic coatings are obtained by heating a matt electrolytic coating above its melting point for a few seconds and then cooling it. The coatings preserve their sheen after cooling. In practice, flow brightening is not used for coatings with thicknesses above 5 μm (slip risk) or for coatings that are already bright.

NOTE - Tin electrolytic coatings may experience a spontaneous growth of metallic filaments (the combined effect of humidity and mechanical stresses, for example). This phenomenon is highly undesirable for electrotechnical applications (risk of short circuit). The risk of this occurring can be reduced by flow brightening, using tin-lead alloy coatings or inserting a suitable sublayer.

TYPES OF STEEL ELECTROLYTIC COATINGS AND TIN ALLOYS ACCORDING TO APPLICABLE EN 14436

Coating thickness μm		Types of coatings
min.	max.	Sn bright (Snb)	Sn matt (Snm)	Sn flow-brightened (Snf)
	1	As	N/A	As
0.8	1.2	As	N/A	*
1.5	2.5	B	As	B - R
2	4	B - C	R	B - R
3	6	B - C	R	N/A
5		B - C	R - C	N/A

NOTE 1: Applications:

N/A: not applicable
B: improves the suitability for soft soldering
*: reduces frictional forces
C: corrosion resistance
R: reduction of electrical resistance on a contact
As: improved appearance

NOTE 2: These typical values are for information purposes and can be replaced by agreement between the customer and the supplier.

COMPOSITION OF THE TIN AND TIN ALLOYS EN 14436

Type of coating	Designation of the material	Composition in % (mass fraction)
Type of coating	Designation of the material	Min. Sn	Others, total
Sn bright (Snb)	Sn99	99	Remainder
Sn matt (Snm) or Sn flow-brightened (Snf)	Sn99.50	99.5	Remainder

HOT DIP EN 13148

APPEARANCE EN 13148. HOT DIP TINNING

Thicknesses (average values) and preferred thickness ranges for coatings:

Thickness	Thickness range		Application
µm	µm
average value	from	up to & including
1.45	0.7	2.2	Preventing surface oxidation, decorative appearance, reducing frictional forces.
2	1	3	Preventing surface oxidation, decorative appearance, reducing frictional forces.
3.5	2	5	Preventing corrosion
5	3	7	Extending the useful life
7.5	5	10	To aid soft soldering
10	7	13	To aid soft soldering

The appearance depends on the type of liquid film cooling, the type of coating and the technique used to remove excess molten metal. The surface may have a bright or matt appearance, or a combination of both. The appearance of the coating does not affect its suitability. If there are special requirements for the appearance of the coating, these requirements must be agreed at the time of the quote and/or order.

THICKNESS TOLERANCES EN 13599 / EN 1652

Nominal thickness		Thickness tolerance for nominal widths according to EN 13599/ EN 1652
>	≤	10 < and ≤ 200		200 < and ≤ 350	350 < and ≤ 700	700 < and ≤ 1000	1000 < and ≤ 1250
>	≤	normal (Class A)	special (Class B)	200 < and ≤ 350	350 < and ≤ 700	700 < and ≤ 1000	1000 < and ≤ 1250
0.05¹⁾	0.1	± 10% ²⁾	-	-	-	-	-
0.1	0.2	± 0.010	± 0.007	± 0.015	-	-	-
0.2	0.3	± 0.015	± 0.010	± 0.020	± 0.03	± 0.04	-
0.3	0.4	± 0.018	± 0.012	± 0.022	± 0.04	± 0.05	± 0.07
0.4	0.5	± 0.020	± 0.015	± 0.025	± 0.05	± 0.06	± 0.08
0.5	0.8	± 0.025	± 0.018	± 0.030	± 0.06	± 0.07	± 0.09
0.8	1.2	± 0.030	± 0.022	± 0.040	± 0.07	± 0.09	± 0.10
1.2	1.8	± 0.035	± 0.028	± 0.06	± 0.08	± 0.10	± 0.11
1.8	2.5	± 0.045	± 0.035	± 0.07	± 0.09	± 0.11	± 0.13
2.5	3.2	± 0.055	± 0.040	± 0.08	± 0.10	± 0.13	± 0.17
3.2	4.0	-	-	± 0.10	± 0.12	± 0.15	± 0.20
4.0	5.0	-	-	± 0.12	± 0.14	± 0.17	± 0.23
5.0	6.0	-	-	± 0.14	± 0.16	± 0.20	± 0.26

Measurements in mm.
1) Including the value 0.05.
2) ± 10% of the nominal thickness

THICKNESS TOLERANCE FOR COATED MATERIAL

EN 13148. The thickness of the tinned strip must meet the required combination of tolerances for the thickness of the strip (table above) and the range of thicknesses of the coatings ordered, for both sides.

EN 14436. The thickness of the strip prior to tinning must be in accordance with the approximate tolerances given in the table above. The thickness tolerance of the tinned strip must take into account the minimum and maximum thicknesses of the coating.

WIDTH TOLERANCES OF THE STRIPS

Nominal thickness t		Standard slitting tolerances for Metalle Schmidt ²⁾				Width tolerances for nominal widths according to EN 13599/ EN 1654
<	≤	3-15	15-50	50-150	>150	up to & including 50	over 50 and up to 100 inclusive	over 100 and up to 200 inclusive	over 200 and up to 350 inclusive	over 350 and up to 500 inclusive	over 500 and up to 700 inclusive	over 700 and up to 1250 inclusive
<	≤	3-15	15-50	50-150	>150	up to & including 50	over 50 and up to 100 inclusive	over 100 and up to 200 inclusive	over 200 and up to 350 inclusive	over 350 and up to 500 inclusive	over 500 and up to 700 inclusive	over 700 and up to 1250 inclusive	0,05	0,1	-	-	-	-	0;+0,2¹⁾	-	-	-	-	-	-
0,1	0,2	0;+0,15³⁾	0;+0,15³⁾	0;+0,15³⁾	0;+0,2³⁾	0;+0,2	0;+0,3	0;+0,4	0;+0,6	0;+1,0	0;+1,5	0;+2,0
0,2	0,4	0;+0,15	0;+0,15	0;+0,15	0;+0,2	0;+0,2	0;+0,3	0;+0,4	0;+0,6	0;+1,0	0;+1,5	0;+2,0
0,4	1	0;+0,17	0;+0,18	0;+0,2	0;+0,24	0;+0,2	0;+0,3	0;+0,4	0;+0,6	0;+1,0	0;+1,5	0;+2,0
1	1,5	0;+0,2	0;+0,2	0;+0,2	0;+0,3	0;+0,3	0;+0,4	0;+0,5	0;+1,0	0;+1,2	0;+1,5	0;+2,0
1,5	2	on request	0;+0,26	0;+0,3	0;+0,32	0;+0,3	0;+0,4	0;+0,5	0;+1,0	0;+1,2	0;+1,5	0;+2,0
2	2,5	on request	0;+0,26	0;+0,3	0;+0,32	0;+0,5	0;+0,6	0;+0,7	0;+1,2	0;+1,5	0;+2,0	0;+2,5
2,5	3	on request	on request	0;+0,32	0;+0,35	0;+1,0	0;+1,1	0;+1,2	0;+1,5	0;+2,0	0;+2,5	0;+3,0
3	5	on request	on request	0;+0,32	0;+0,35	0;+2,0	0;+2,3	0;+2,5	0;+3,0	0;+4,0	0;+5,0	0;+6,0

Measurements in mm.

1) Including the value t=0.05
2) Other, closer dimensional tolerances are possible under a commercial agreement .
3) Including the value t=0,1

LENGTH TOLERANCES 13599

Length tolerances of thick sheets, thin sheets and strips in cut lengths of up to 5000mm.

Length	Nominal thickness	Length tolerance
Without rolling (M)	up to & including 25	±50
Fixed length (F)	5 and above	0; +10
Fixed length (F)	over 5 and up to 10 inclusive	0; +15

Measurements in mm.

EDGE CAMBER TOLERANCES

Nominal width (W)	Edge curve tolerances under commercial agreement		Edge curve tolerances according to the EN 13599 Standard
	Maximum deviation 1000 mm Thickness (t)		Maximum deviation 1000 mm Thickness (t)


	t ≤ 1.20 mm	t > 1.20 mm	t ≤ 0.5 mm	0.5 < t ≤ 1.20 mm	1.20 < t ≤ 2.50 mm	2.50 < t ≤ 3.20 mm	3.20 < t ≤ 5.00 mm
3 ≤ W < 6	2.50	4.00	-	-	-	-	-
6 < W ≤ 10	2.00	3.00	-	-	-	-	-
10 < W ≤ 15	1.00	1.50	7.00 ¹⁾	10.00	-	-	-
15 < W ≤ 20	1.00	1.50	4.00	6.00	8.00	-	-
20 < W ≤ 30	0.50	1.00	4.00	6.00	8.00	-	-
30 < W ≤ 50	0.50	1.00	3.00	4.00	6.00	7.00	*under a commercial agreement
50 < W ≤ 350	0.50	1.00	2.00	3.00	4.00	5.00
350 < W ≤ 1250	-	-	2.00	3.00	4.00	5.00

Measurements in mm.
1) Including nominal width 10mm.

* The data contained in this catalogue are for information purposes only and are not under any circumstances, contractual supply conditions. Errors and omissions excepted.