Mechanical Properties ISO.898


Mechanical Properties of Metric Bolts & Sets ISO.898

  
STRENGTH GRADE DESIGNATION TENSILE
RANGE
N/mm2		 HARDNESS
HB		 HARDNESS
HV		 HARDNESS
ROCKWELL
B		 HARDNESS
ROCKWELL
C
4.6 Min 400 114 120 67 -
Max - 238 250 99.5 -
4.8 Min 420 124 130 71 -
Max - 238 250 99.5 -
5.6 Min 500 147 155 79 -
Max - 238 250 99.5 -
5.8 Min 520 152 160 82 -
Max - 238 250 99.5 -
6.8 Min 600 181 190 89 -
Max - 238 250 99.5 -
8.8<16
mm Dia		 Min 800 238 250 - 22
Max - 304 320 - 32
8.8>16
mm Dia		 Min 830 242 255 - 23
Max - 318 335 - 34
9.8 Min 900 276 290 - 28
Max - 342 360 - 37
10.9 Min 1040 304 320 - 32
Max - 361 380 - 39
12.9 Min 1220 366 385 - 39
Max - 414 435 - 44

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