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Hard Drawn Steel Wire

HARD DRAWN STEEL WIRE - CHEMICAL COMPOSITION, MASS % EN 10270-1:2011

  Chemical composition %
Designation European Standard (EN) C Si Mn Max. P Max. S Max. Cu
SL EN 10270-1 0.35 - 1.00 0.10 - 0.30 0.40 - 1.20 0.035 0.035 0.20
SM EN 10270-1 0.35 - 1.00 0.10 - 0.30 0.40 - 1.20 0.035 0.035 0.20
SH EN 10270-1 0.35 - 1.00 0.10 - 0.30 0.40 - 1.20 0.035 0.035 0.20
DM EN 10270-1 0.45 - 1.00 0.10 - 0.30 0.40 - 1.20 0.020 0.025 0.12
DH EN 10270-1 0.45 - 1.00 0.10 - 0.30 0.40 - 1.20 0.020 0.025 0.12
CLASS II DIN 17223:1964-1 values not guaranteed 0.030 0.030 0.12

Note- For diameters ≥ 1.6mm , the hard drawn steel wire can be supplied using patented or unpatented lead material.

 

APPROXIMATE EQUIVALENTS 

  EUROPEAN   AMERICAN JAPANESE CHINESE
DESIGNATION EN STANDARD DIN ASTM G-3506 / G3522 GB / T 4357
SL EN 10270-1 CLASS A A 227 SWB SL
SM EN 10270-1 CLASS B A 227 SWC SM
SH EN 10270-1 CLASS C A 228 SWP-B SH
DM EN 10270-1 - A 227 - -
DH EN 10270-1 CLASS D A 228 SWP-B DH
CLASS II DIN 17223:1964-1 CLASS II - - -
 

APPLICATION OF HARD DRAWN STEEL WIRE

TYPE Application of Hard Drawn Steel Wire
SL Tension, compression or torsion springs that are chiefly subjected to low static stress.
SM Tension, compression or torsion springs that are subjected to medium-high static stresses or, rarely, dynamic stresses.
DM Tension, compression or torsion springs that are subjected to medium-high dynamic stresses. Also for wire shapes that require severe bending.
SH Tension, compression or torsion springs that are subjected to high static stresses or moderately dynamic stresses.
DH Tension, compression and torsion springs that are mainly submitted to high static strains and to medium levels of dynamic strains.
CLASS II Compression springs, extension springs,and torsion springs for high and dynamic stresses.


Types of wires for springs. Classed according to EN 10270-1: 

Tensile strength Static conditions Dynamic conditions
Low SL -
Medium SM DM
High SH DH

 

 

MECHANICAL PROPERTIES AND QUALITY REQUIREMENTS OF THE SL, SM, DM, SH AND DH STEEL WIRE TYPES EN 10270-1

Diameter of the wire d Tensile strength Rm For steel wires of the type CLASS II (approx.) 1) Minimum area reduction after Z break for SL, SM, SH, DM and DH wire types
Nominal value mm SL SM DM SH DH e
MPa MPa MPa MPa MPa %
d = 0.05 - - - - 2800 - 3520    
0.05 < d ≤ 0.06 - - - - 2800 - 3520    
0.06 < d ≤ 0.07 - - - - 2800 - 3520    
0.07 < d ≤ 0.08 - - - - 2800 - 3480    
0.08 < d ≤ 0.09 - - - - 2800 - 3430    
0.09 < d ≤ 0.10 - - - - 2800 - 3380    
0.10 < d ≤ 0.11 - - - - 2800 - 3350    
0.11 < d ≤ 0.12 - - - - 2800 - 3320 2700 - 3090  
0.12 < d ≤ 0.14 - - - - 2800 - 3250    
0.14 < d ≤ 0.16 - - - - 2800 - 3200    
0.16 < d ≤ 0.18 - - - - 2800 - 3160    
0.18 < d ≤ 0.20 - - - - 2800 - 3110    
0.20 < d ≤ 0.22 - - - - 2770 - 3080    
0.22 < d ≤ 0.25 - - - - 2770 - 3010    
0.25 < d ≤ 0.28 - - - - 2680 - 2970    
0.28 < d ≤ 0.30 - 2370 - 2650 2370 - 2650 2660 - 2940 2660 - 2940    
0.30 < d ≤ 0.32 - 2350 - 2630 2350 - 2630 2640 - 2920 2640 - 2920    
0.32 < d ≤ 0.34 - 2330 - 2600 2330 - 2600 2610 - 2890 2610 - 2890    
0.34 < d ≤ 0.36 - 2310 - 2580 2310 - 2580 2590 - 2870 2590 - 2870 2650 - 3040  
0.36 < d ≤ 0.38 - 2290 - 2560 2290 - 2560 2570 - 2850 2570 - 2850    
0.38 < d ≤ 0.40 - 2270 - 2550 2270 - 2550 2560 - 2830 2560 - 2830    
0.40 < d ≤ 0.43 - 2250 - 2520 2250 - 2520 2530 - 2800 2530 - 2800    
0.43 < d ≤ 0.45 - 2240 - 2500 2240 - 2500 2510 - 2780 2510 - 2780    
0.45 < d ≤ 0.48 - 2220 - 2480 2220 - 2480 2490 - 2760 2490 - 2760 2650 - 2940  
0.48 < d ≤ 0.50 - 2200 - 2470 2200 - 2470 2480 - 2740 2480 - 2740    
0.50 < d ≤ 0.53 - 2180 - 2450 2180 - 2450 2460 - 2720 2460 - 2720    
0.53 < d ≤ 0.56 - 2170 - 2430 2170 - 2430 2440 - 2700 2440 - 2700    
0.56 < d ≤ 0.60 - 2140 - 2400 2140 - 2400 2410 - 2670 2410 - 2670    
0.60 < d ≤ 0.63 - 2130 - 2380 2130 - 2380 2390 - 2650 2390 - 2650 2550 - 2840  
0.63 < d ≤ 0.65 - 2120 - 2370 2120 - 2370 2380 - 2640 2380 - 2640    
0.65 < d ≤ 0.70 - 2090 - 2350 2090 - 2350 2360 - 2610 2360 - 2610    
0.70 < d ≤ 0.75 - 2070 - 2320 2070 - 2320 2330 - 2580 2330 - 2580    
0.75 < d ≤ 0.80 - 2050 - 2300 2050 - 2300 2310 - 2560 2310 - 2560   40
0.80 < d ≤ 0.85 - 2030 - 2280 2030 - 2280 2290 - 2530 2290 - 2530 2500 - 2800 40
0.85 < d ≤ 0.90 - 2010 - 2260 2010 - 2260 2270 - 2510 2270 - 2510   40
0.90 < d ≤ 0.95 - 2000 - 2240 2000 - 2240 2250 - 2490 2250 - 2490   40
0.95 < d ≤ 1.00 1720 - 1970 1980 - 2220 1980 - 2220 2230 - 2470 2230 - 2470   40
1.00 < d ≤ 1.05 1710 - 1950 1960 - 2200 1960 - 2200 2210 - 2450 2210 - 2450 2450 - 2750 40
1.05 < d ≤ 1.10 1690 - 1940 1950 - 2190 1950 - 2190 2200 - 2430 2200 - 2430   40
1.10 < d ≤ 1.20 1670 - 1910 1920 - 2160 1920 - 2160 2170 - 2400 2170 - 2400   40
1.20 < d ≤ 1.25 1660 - 1900 1910 - 2140 1910 - 2140 2150 - 2380 2150 - 2380   40
1.25 < d ≤ 1.30 1640 - 1890 1900 - 2130 1900 - 2130 2140 - 2370 2140 - 2370 2350 - 2650 40
1.30 < d ≤ 1.40 1620 - 1860 1870 - 2100 1870 - 2100 2110 - 2340 2110 - 2340   40
1.40 < d ≤ 1.50 1600 - 1840 1850 - 2080 1850 - 2080 2090 - 2310 2090 - 2310   40
1.50 < d ≤ 1.60 1590 - 1820 1830 - 2050 1830 - 2050 2060 - 2290 2060 - 2290 2260 - 2500 40
1.60 < d ≤ 1.70 1570 - 1800 1810 - 2030 1810 - 2030 2040 - 2260 2040 - 2260   40
1.70 < d ≤ 1.80 1550 - 1780 1790 - 2010 1790 - 2010 2020 - 2240 2020 - 2240 2210 - 2450 40
1.80 < d ≤ 1.90 1540 - 1760 1770 - 1990 1770 - 1990 2000 - 2220 2000 - 2220   40
1.90 < d ≤ 2.00 1520 - 1750 1760 - 1970 1760 - 1970 1980 - 2200 1980 - 2200 2110 - 2350 40
2.00 < d ≤ 2.10 1510 - 1730 1740 - 1960 1740 - 1960 1970 - 2180 1970 - 2180   40
2.10 < d ≤ 2.25 1490 - 1710 1720 - 1930 1720 - 1930 1940 - 2150 1940 - 2150   40
2.25 < d ≤ 2.40 1470 - 1690 1700 - 1910 1700 - 1910 1920 - 2130 1920 - 2130 - 40
2.40 < d ≤ 2.50 1460 - 1680 1690 - 1890 1690 - 1890 1900 - 2110 1900 - 2110   40
2.50 < d ≤ 2.60 1450 - 1660 1670 - 1880 1670 - 1880 1890 - 2100 1890 - 2100   40
2.60 < d ≤ 2.80 1420 - 1640 1650 - 1850 1650 - 1850 1860 - 2070 1860 - 2070 - 40
2.80 < d ≤ 3.00 1410 - 1620 1630 - 1830 1630 - 1830 1840 - 2040 1840 - 2040 - 40
3.00 < d ≤ 3.20 1390 - 1600 1610 - 1810 1610 - 1810 1820 - 2020 1820 - 2020 - 40
3.20 < d ≤ 3.40 1370 - 1580 1590 - 1780 1590 - 1780 1790 - 1990 1790 - 1990 - 40
3.40 < d ≤ 3.60 1350 - 1560 1570 - 1760 1570 - 1760 1770 - 1970 1770 - 1970 - 40
3.60 < d ≤ 3.80 1340 - 1540 1550 - 1740 1550 - 1740 1750 - 1950 1750 - 1950 - 40
3.80 < d ≤ 4.00 1320 - 1520 1530 - 1730 1530 - 1730 1740 - 1930 1740 - 1930 - 35
4.00 < d ≤ 4.25 1310 - 1500 1510 - 1700 1510 - 1700 1710 - 1900 1710 - 1900 - 35
4.25 < d ≤ 4.50 1290 - 1490 1500 - 1680 1500 - 1680 1690 - 1880 1690 - 1880 - 35
4.50 < d ≤ 4.75 1270 - 1470 1480 - 1670 1480 - 1670 1680 - 1860 1680 - 1860 - 35
4.75 < d ≤ 5.00 1260 - 1450 1460 - 1650 1460 - 1650 1660 - 1840 1660 - 1840 - 35
5.00 < d ≤ 5.30 1240 - 1430 1440 - 1630 1440 - 1630 1640 - 1820 1640 - 1820 - 35
5.30 < d ≤ 5.60 1230 - 1420 1430 - 1610 1430 - 1610 1620 - 1800 1620 - 1800 - 35
5.60 < d ≤ 6.00 1210 - 1390 1400 - 1580 1400 - 1580 1590 - 1770 1590 - 1770 - 35
6.00 < d ≤ 6.30 1190 - 1380 1390 - 1560 1390 - 1560 1570 - 1750 1570 - 1750 - 35
6.30 < d ≤ 6.50 1180 - 1370 1380 - 1550 1380 - 1550 1560 - 1740 1560 - 1740 - 35
6.50 < d ≤ 7.00 1160 - 1340 1350 - 1530 1350 - 1530 1540 - 1710 1540 - 1710 - 35
7.00 < d ≤ 7.50 1140 - 1320 1330 - 1500 1330 - 1500 1510 - 1680 1510 - 1680 - 30
7.50 < d ≤ 8.00 1120 - 1300 1310 - 1480 1310 - 1480 1490 - 1660 1490 - 1660 - 30
8.00 < d ≤ 8.50 1110 - 1280 1290 - 1460 1290 - 1460 1470 - 1630 1470 - 1630 - 30
8.50 < d ≤ 9.00 1090 - 1260 1270 - 1440 1270 - 1440 1450 - 1610 1450 - 1610 - 30
9.00 < d ≤ 9.50 1070 - 1250 1260 - 1420 1260 - 1420 1430 - 1590 1430 - 1590 - 30
9.50 < d ≤ 10.00 1060 - 1230 1240 - 1400 1240 - 1400 1410 - 1570 1410 - 1570 - 30
10.00 < d ≤ 10.50 - 1220 - 1380 1220 - 1380 1390 - 1550 1390 - 1550 - 30
10.50 < d ≤ 11.00 - 1210 - 1370 1210 - 1370 1380 - 1530 1380 - 1530 - 30
11.00 < d ≤ 12.00 - 1180 - 1340 1180 - 1340 1350 - 1500 1350 - 1500 - 30
12.00 < d ≤ 12.50 - 1170 - 1320 1170 - 1320 1130 - 1480 1130 - 1480 - 28
12.50 < d ≤ 13.00 - 1160 - 1310 1160 - 1310 1320 - 1470 1320 - 1470 - 28
13.00 < d ≤ 14.00 - 1130 - 1280 1130 - 1280 1290 - 1440 1290 - 1440 - 28
14.00 < d ≤ 15.00 - 1160 - 1260 1160 - 1260 1270 - 1410 1270 - 1410 - 28
15.00 < d ≤ 16.00 - 1090 - 1230 1090 - 1230 1240 - 1390 1240 - 1390 - 28
16.00 < d ≤ 17.00 - 1070 - 1210 1070 - 1210 1220 - 1360 1220 - 1360 - 28
17.00 < d ≤ 18.00 - 1050 - 1190 1050 - 1190 1200 - 1340 1200 - 1340 - 28
18.00 < d ≤ 19.00 - 1030 - 1170 1030 - 1170 1180 - 1320 1180 - 1320 - 28
19.00 < d ≤ 20.00 - 1020 - 1150 1020 - 1150 1160 - 1300 1160 - 1300 - 28

1) The values listed in DIN 17223:1964 were given in kg/mm2; the conversion performed is for guidance purposes.

 

 

PERMISSIBLE TENSILE STRENGTH RANGE (MPa) IN A SINGLE PACKAGE EN 10270-1:2011

Nominal diameter d mm SL, SM, SH DM, DH
d < 0.80 150 150
0.80 ≤ d < 1.60 120 100
1.60 ≤ d 120 70

The requirements are applicable to unit packages in which the mass in kilogrammes is not greater than the value 250 x d (d = wire diameter in mm) or a value of 1000 kg. In the case of coils with a higher mass, appropriate arrangements must be agreed.

Coatings subject to Standards:

Coating   Description
Phosphated ph The wire is treated in a solution so that a layer of phosphated metal forms on its surface.
Galvanising Z The surface is coated in a layer of zinc.
Zinc - Aluminium ZA The surface is coated in a layer of Zn 95 / Al 5(%)
Reddish rd The surface is coated with a thin layer of copper, normally a conversion coating.
Coppery Cu The surface is coated in a thick (even) layer of copper

 

MINIMUM COATING DENSITY REQUIRED OF ZINC OR ZINC/ALUMINIUM EN 10270-1

Nominal diameter d mm Minimum coating density a) b) g/m²
0.20 ≤ d < 0.25 20
0.25 ≤ d < 0.40 25
0.40 ≤ d < 0.50 30
0.50 ≤ d < 0.60 35
0.60 ≤ d < 0.70 40
0.70 ≤ d < 0.80 45
0.80 ≤ d < 0.90 50
0.90 ≤ d < 1.00 55
1.00 ≤ d < 1.20 60
1.20 ≤ d < 1.40 65
1.40 ≤ d < 1.65 70
1.65 ≤ d < 1.85 75
1.85 ≤ d < 2.15 80
2.15 ≤ d < 2.50 85
2.50 ≤ d < 2.80 95
2.80 ≤ d < 3.20 100
3.20 ≤ d < 3.80 105
3.80 ≤ d < 10.00 110

a) The requirements regarding zinc coatings fall within class C in Standard EN 10244-2:2009.
b) If different coating weights are required, priority will be given to the reference coating weights established in Standard En 10244-2 (for example: class D of standard En 10244-2:2009).

 

SALT SPRAY TEST

Minimum coating density in order to achieve a certain number of hours. (Data provided for information purposes only)
GALVANISED COATING Zn - Al COATING
Exposure time (hours) Density of Zn (g/m2) Exposure time (hours) Density of Zn - Al (g/m2)
36 80 - -
48 90 120 >40
72 105 240 >60
96 125 264 >75
120 165 288 >85
144 195 312 >100
168 220 360 >110
192 240 408 >125

 

The Zn - Al coating offers corrosion resistance that is 2 to 3 times higher than zinc in a salt spray test (NaCl) and in a SO2 atmosphere.

Hard Drawn Steel Wire

 

Diameter tolerances. Permissible deviations according to EN 10270-1

Diameter of the wire d
Nominal value mm Permissible deviations mm
0.05 < d ≤ 0.09 ± 0.003
0.09 < d ≤ 0.16 ± 0.004
0.16 < d ≤ 0.25 ± 0.005
0.25 < d ≤ 0.63 ± 0.008
0.63 < d ≤ 0.75 ± 0.010
0.75 < d ≤ 1.00 ± 0.015
1.00 < d ≤ 1.20 ± 0.020
1.20 < d ≤ 1.70 ± 0.020
1.70 < d ≤ 2.60 ± 0.025
2.60 < d ≤ 4.00 ± 0.030
4.00 < d ≤ 5.30 ± 0.035
5.30 < d ≤ 7.00 ± 0.040
7.00 < d ≤ 9.00 ± 0.045
9.00 < d ≤ 10.00 ± 0.050
10.00 < d ≤ 11.00 ± 0.070
11.00 < d ≤ 14.00 ± 0.080
14.00 < d ≤ 18.00 ± 0.090
18.00 < d ≤ 20.00 ± 0.100

 

 

OVALITY

The difference between the maximum diameter and the minimum diameter of the wire in the same cross section must be no greater than 50% of the total permissible deviation specified on the mechanical properties table

 

WHEN SUPPLIED IN RODS. Straightened wire:

Nominal diameter d mm Diameter tolerance a) mm Supply capacity b) mm.
Lower tolerance Higher tolerance Minimum length Maximum length
0.65 ≤ d < 0.80 -0.010 +0.022 50 2000
0.80 ≤ d < 1.01 -0.015 +0,030 30 2000
1.01 ≤ d < 1.35 -0.020 +0,040    
1.35 ≤ d < 1.78 -0.020 +0,045    
1.78 ≤ d < 2.01 -0.025 +0,055    
2.01 ≤ d < 2.35 -0.025 +0,060 30 4000
2.35 ≤ d < 2.78 -0.025 +0,065    
2.78 ≤ d < 3.01 -0.030 +0,075    
3.01 ≤ d < 3.35 -0.030 +0,080 30 4000
3.35 ≤ d < 4.01 -0.030 +0,090    
4.01 ≤ d < 4.35 -0.035 +0,100    
4.35 ≤ d < 5.01 -0.035 +0,110 30 4350
5.01 ≤ d < 5.45 -0.035 +0,120    
5.45 ≤ d < 6.01 -0.040 +0,130    
6.01 ≤ d < 7.12 -0.040 +0.150 250 4350
7.12 ≤ d < 7.67 -0.045 +0,160
7.67 ≤ d < 9.01 -0.045 +0,180
9.01 ≤ d < 10.01 -0.050 +0,200
10.01 ≤ d < 10.50 -0.070 +0,240

a) Diameter tolerances of straightened and cut lengths according to EN 10270-1
b) Approximate data for information purposes
.

 

STANDARD LENGTH TOLERANCES

NOMINAL LENGTH TOLERANCE
L < = 1000 mm. +/- 1 mm.
1000 < L < = 4000 - 0mm. / +3 mm.
* 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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