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Bronze

Designation   Chemical composition in % (mm)
Min. Cu Max. Fe Max. Ni Min. P Max. P Max. Pb Min. Sn Max. Sn Min. Zn Max. Zn Others total max.
Classification of symbols Numerical
 classification
European Standard (EN)
CuSn4 CW450K EN 1652/1654 Rest 0.1 0.2 0.01 0.4 0.02 3.5 4.5 - 0.2 0.2
CuSn6 CW452K EN 1652/1654 Rest 0.1 0.2 0.01 0.4 0.02 5.5 7.0 - 0.2 0.2
CuSn8 CW453K EN 1652/1654 Rest 0.1 0.2 0.01 0.4 0.02 7.5 8.5 - 0.2 0.2
CuSn3Zn9 CW454K EN 1654 Rest 0.1 0.2 - 0.2 0.10 1.5 3.5 7.5 10.0 0.2
  APPROXIMATE INTERNATIONAL EQUIVALENTS
Classification of symbols Numerical
 classification
European Standard (EN) US (AISI) Japan (JIS) China (GB)
CuSn4 CW450K EN 1652/1654      
CuSn6 CW452K EN 1652/1654 C51900 C 5191  
CuSn8 CW453K EN 1652/1654      
CuSn3Zn9 CW454K EN 1654 C42500    

MECHANICAL PROPERTIES EN 1652 / EN 1654 

Designations Tensile strength Rm Conventional yield strength at 0.2% Rp0.2 Elongation HV hardness
N/mm² A50mm for thicknesses up to 2.5 mm (inclusive) % A for thicknesses above 2.5 mm %
Material Metallurgical condition min. max. N/mm² min. max.
Classification of symbols Numerical classification min. min.
    R290 290 390 (max. 190) 40 50 - -
    H070 - - - - - 70 100
                   
    R390 390 490 (min. 210) 11 13 - -
    H115 - - - - - 115 155
                   
CuSn4 CW450K R480 480 570 (min. 420) 4 5 - -
    H150 - - - - - 150 180
                   
    R540 540 930 (min. 490) 3 - - -
    H170 - - - - - 170 200
                   
    R610 610 - (min. 540) - - - -
    H190 - - - - - 190 -
    H350 350 420 (min. 300) 45 55 -  
    H080 - - - - - 80 110
                   
    R420 420 520 (min. 260) 17 20 - -
    H125 - - - - - 125 165
                   
    R500 500 590 (min. 450) 8 10 - -
    H160 - - - - - 160 190
CuSn6 CW452K                
    R560 560 650 (min. 500) 5 - - -
    H180 - - - - - 180 210
                   
    R640 640 730 (min. 600) 3 - - -
    H200 - - - - - 200 230
                   
    R720 720 - (min. 690) - - - -
    H220 - - - - - 220 -
    R370 370 450 (max. 300) 50 60 - -
    H90 - - - - - 90 120
                   
    R450 450 550 (min. 280) 20 23 - -
    H135 - - - - - 136 175
                   
    R640 540 630 (min. 460) 13 16 - -
    H170 - - - - - 170 200
CuSn8 CW453K                
    R600 600 690 (min. 530) 5 7 - -
    H190 - - - - - 190 220
                   
    R660 660 750 (min. 620) 3 - - -
    H210 - - - - - 210 240
                   
    R740 740 - (min. 700) 2 - - -
    H230 - - - - - 230 -
    R430 430 520 (330) 6 8 - -
    H140 - - - - - 140 170
                   
    R510 510 600 (430) 3 5 - -
    H160 - - - - - 160 190
CuSn3Zn9 CW454K                
    R580 580 690 (520) - 2 - -
    H180 - - - - - 180 210
                   
    R660 660 - (610) - - - -
    H200 - - - - - 200 8

NOTE 1- The numbers in brackets are not requirements of the standard and are given for information purposes only.

 

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)
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)
0.05 1) 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 Schmidt2) 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
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
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.
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