The properties of each grade are determined by the Austempering treatment
and are not affected by chemistry of the iron.
European Standard Grades according to EN 1564
ADI Grade |
Min. Tensile Strength |
Min. Yield Strength |
Elongation |
Hardness |
| |
Mpa |
Mpa |
% |
BHN |
800 |
800 |
500 |
8 |
260-320 |
| |
1000 |
1000 |
700 |
5 |
300-360 |
| |
1200 |
1200 |
850 |
2 |
340-440 |
| |
1400 |
1400 |
1100 |
1 |
380-480 |
| |
US Standard Grades according to ASTM A897/A897M-03
Grade |
Min.
Tensile Strength |
Min. Yield Strength |
Elongation |
Impact
Energy |
Hardness |
| |
Mpa |
Ksi |
Mpa |
Ksi |
% |
Joules |
Ft-lb |
BHN |
1 |
900 |
130 |
650 |
90 |
9 |
100 |
75 |
269-341 |
| |
2 |
1050 |
150 |
750 |
110 |
7 |
80 |
60 |
302-375 |
| |
3 |
1200 |
175 |
850 |
125 |
4 |
60 |
45 |
341-444 |
| |
4 |
1400 |
200 |
1100 |
155 |
2 |
35 |
25 |
388-477 |
| |
5 |
1600 |
230 |
1300 |
185 |
1 |
20 |
15 |
402-512 |
| |
