Wire Breaking Load Ratings & Comparison Table
TYPICAL GRADE 316 STAINLESS STEEL WIRE ROPE BREAKING LOADS
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WIRE DIAMETER
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1 x19
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7 x 19
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7 x 7
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mm
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in.
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kN
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kg
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lb
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kN
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kg
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lb
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kN
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kg
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lb
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1.2mm
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3/64 in.
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1.08
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110
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243
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0.81
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83
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183
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0.85
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87
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192
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1.5mm
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1/16 in.
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1.76
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180
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397
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1.23
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126
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278
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2.01
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205
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452
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2.0mm
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5/64 in.
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3.14
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320
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705
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2.26
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275
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606
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2.37
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242
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534
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-
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3/32 in.
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4.74
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484
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1065
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4.08
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417
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917
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3.25
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332
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730
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2.5mm
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-
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4.90
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500
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1102
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3.82
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428
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944
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3.71
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378
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833
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3.0mm
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1/8 in.
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7.06
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720
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1587
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6.00
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612
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1349
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5.34
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544
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1200
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4.0mm
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5/32 in.
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12.60
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1285
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2833
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8.89
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907
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2000
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9.40
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959
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2115
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-
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3/16 in.
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18.90
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1930
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4255
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12.60
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1280
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2822
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14.10
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1437
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3168
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5.0mm
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-
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19.60
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2000
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4410
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13.90
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1418
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3127
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14.80
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1509
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3327
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5.6mm
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7/32 in.
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24.20
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2470
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5445
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17.20
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1750
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3858
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18.10
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1850
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4080
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6.0mm
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-
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28.00
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2876
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6340
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20.00
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2040
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4498
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21.40
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2181
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4810
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-
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1/4 in.
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34.00
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3440
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7584
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22.00
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2280
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5027
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25.90
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2642
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5825
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7.0mm
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9/32 in.
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35.00
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3549
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7807
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36.00
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2785
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6127
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29.10
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2966
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6526
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8.0mm
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5/16 in.
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86.00
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8770
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19335
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68.00
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6950
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15322
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76.70
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7820
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17240
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12.0mm
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-
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102.00
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10401
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22930
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80.00
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98163
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17958
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85.40
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8700
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19180
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-
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1/2 in.
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119.00
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12101
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26678
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90.00
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9150
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20172
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107.00
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10900
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24030
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14.0mm
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9/16 in.
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139.00
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14174
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31248
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109.00
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11122
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24624
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117.00
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11930
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26300
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16.0mm
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5/8 in.
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182.00
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18559
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40916
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133.00
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14387
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31723
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-
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-
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-
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19.0mm
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3/4 in.
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212.00
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21618
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47660
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191.00
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19500
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44730
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-
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-
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-
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22.0mm
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7/8 in.
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285.00
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29062
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64071
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-
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-
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-
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-
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-
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-
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26.0mm
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1 in.
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398.00
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40585
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89475
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-
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-
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-
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-
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-
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-
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STRETCH IN WIRE
Stretch is a characteristic of all wire cables, initially as permanent stretch when the load is first applied and the individual wires bed down, and then as conventional elastic stretch within the wires. Where stretch is critical to the application, initial stretch can be accounted for with cables pre-tensioned or pre-stressed during swaging and cable manufacturing. Elastic stretch can be calculated by the following formula:
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Elastic stretch (mm)=
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W x L
E x A |
Where:
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W=
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Applied Load (kN)
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L=
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Cable length (mm)
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E=
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Strand modulus (kN/mm2)
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A=
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Area of cable= D2 x π
_____________- E x A |
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Where D=
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Normal diameter of cable (mm)
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Typical values for E are:
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7 x 19
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47.5 kN/mm2 (6.89 x 106 P.S.I.)
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7 x 7
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57.3 kN/mm2 (8.31 x 106 P.S.I.)
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1 x 19
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107.5 kN/mm2 (15.59 x 1066 P.S.I.)
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