64.8 64.5 64.2 63.8 63.5 63.1 62.7 62.4 62 61.6 61.2 60.7 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
A Scale 0 Kg Diamond Brale
B Scale 100 Kg 1/16” Ball
C Scale 150 Kg Diamond Brale
D Scale 150 Kg Diamond Brale
ROCKWELL
BRINELL
VICKERS
KNOOP
3000 Kg 10mm Ball
-
≥ 500g load
Approx. tensile strength of steel (PSI)
105 - 104 - 103 - 102 - 100 99.5 - 98.1 - 96.7 - 95 - 93.4 - 91.5 - 89.5 - 87.1 - 85 - 81.7 - 78.7 - 75 - 71.2 - 66.7 - 62.3 - 56.2 52 48 41
29.2 28.5 27.8 27.1 26.4 25.6 24.8 24 23.1 22.2 21.3 20.3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
47.1 46.5 46 45.3 44.9 44.3 43.7 43.1 42.2 41.7 41.1 40.3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
280 275 270 265 261 256 252 247 243 238 233 228 - 219 - 209 - 200 - 190 - 181 - 171 - 162 - 152 - 143 - 133 - 124 - 114 - 105 - 95 90 86 81
295 290 285 280 275 270 265 260 255 250 245 240 235 230 225 220 215 210 205 200 195 190 185 180 175 170 165 160 155 150 145 140 135 130 125 120 115 110 105 100 95 90 85
305 300 296 291 286 282 277 272 267 262 258 253 - 243 - 234 - 226 - 216 - 206 - 196 - 185 - 175 - 164 - 154 - 143 - 133 - 123 - 112 107 102 97
- - 133,000 - 129,000 - - 122,000 - - 115,000 - - 105,000 - 100,000 - 98,000 - - 90,000 - - 83,000 - 79,000 - - - 71,000 - - - 63,000 - - 56,000 - - - - - -
Self-Clinching Fastener Maximum Panel Hardness
Fastener Material
Max. Panel Hardness
Aluminium Unhardened Steel 300 Stainless Steel Hardened Steel Hardened Stainless Steel
HRB 50 HRB 60 HRB 70 HRB 80 - 85* HRB 88 - 92* * Dependent on fastener type
Typical Panel Material Hardnesses
Panel Material
Panel Hardness
5052-H32 Aluminium Cold-rolled Steel 6061-T6 Aluminium Annealed 304 Stainless Steel High Strength Low Alloy Steel (HSLA)
HRB 15 - 30 HRB 40 - 75 HRB 50 - 55 HRB 80+ HRB 80-85 Properties vary so testing is recommended
NP
NORTHERN PRECISION LTD
Specialist Fasteners for Sheet Metal
+44 (0) 1302 836010
+44 (0) 1302 836012
Tel:
Fax:
sales@npfasteners.com
NP
Contact us You can contact us using any of the methods below. Unit 3 Durham Lane Armthorpe Doncaster South Yorkshire DN3 3FE England +44 (0)1302 836010 +44 (0)1302 836012 sales@npfasteners.com
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NORTHERN PRECISION LTD
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