Technical Reference
273
Tensile Strength
GENERAL STEEL GROUP THROUGH HARDNESS VERSUS APPROXIMATE TENSILE STRENGTH
HARDNESS
TENSILE STRENGTH
BRINELL HARDNESS BHN* 10mm BALL, 3000kgf LOAD
ROCKWELL HARDNESS HRC
PLAIN CARBON STEEL AND LOW ALLOY STEEL
STAINLESS STEEL AUSTENITIC TYPE
STAINLESS STEEL CHROMIUM TYPE
BRALE PENETRATOR, 150kgf LOAD
N/mm 2 (APPROX.)
PSI (APPROX.)
kgf/mm 2 (APPROX.)
N/mm 2 (APPROX.)
PSI (APPROX.)
kgf/mm 2 (APPROX.)
N/mm 2 (APPROX.)
PSI (APPROX.)
86 95
285 320 350 385 415 450 480 510 545 575 610 640 675 705 740 770 800 835 865 900 930 965
41,334 46,410 50,761 55,837 60,188 65,264 69,615 73,966 79,042 83,393 88,470 92,820 97,897 102,248 107,324 111,675 116,026 121,102 125,453 130,529 134,880 139,956 149,383 158,810 167,512 176,939 187,091 195,793 205,945 215,372 225,525 236,402 246,554 257,432 267,584 278,461 289,339
105 114 124 133 143 152 162 171 181 190 200 209 219 228 238 247 256 265 275 284 303 322 341 360 379 397 415 433 452 471 488 507 525 545 564
50 56 62 62 68 68 75 75 80 80 85 88 91 94 97
490 549 608 608 667 667 736 736 785 785 834 863 892 922 951 981
71,115 79,649 88,183 88,183 96,716 96,716 106,673 106,673 113,784 113,784 120,896 125,162 129,429 133,696 137,963 142,230 155,031 167,831 180,632 193,433 206,234 221,879 237,524 253,169 268,815 284,460 297,261 310,061 322,862 335,663 348,464
50 53 59 59 65 65 71 71 78 78 81
490 520 579 579 637 637 696 696 765 765 794
71,115 75,382 83,916 83,916 92,450 92,450 100,983 100,983 110,939 110,939 115,206
(0) (3) (6)
(8.5) (11)
(13.4) (15.7)
(18) 20.3 22.2
24
25.6 27.1 28.5 29.8 32.2 34.4 36.6 38.8 40.8 42.7 44.5 46.1 47.7 49.1 50.5 51.7
88
863
125,162
96
941
136,541
100 109 118 127 136 145 156 167 178 189 200 209 218 227 236 245
1,030 1,095 1,155 1,220 1,290 1,350 1,420 1,485 1,555 1,630 1,700 1,775 1,845 1,920 1,995
1,069 1,157 1,245 1,334 1,422 1,530 1,638 1,746 1,853 1,961 2,050 2,138 2,226 2,314 2,403
106 113 120 127 134
1,040 1,108 1,177 1,245 1,314
150,764 160,720 170,676 180,632 190,588
53
54.1 55.2
*A 10mm steel ball is used for 450 BHN and below. A 10mm carbide ball is used above 450 BHN.
Values in parentheses are not contained in the normal definition range for hardness checking, but are often used in a comparable measure.
The Tensile Strength relationship to hardness is inexact, even for the steel, unless it is determined for a specific material. Therefore, this chart provides only very general approximate Tensile Strength values.
All values shown in this chart are approximate and intended only as a reference guide.
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