Carbon
Steel - Mechanical Requirements Metric
| Property Class Designation |
Nominal Size of Product |
Material and Treatment |
Proof Load Stress MPa |
Tensile Yield Strength, MPa, Min. |
Tensile Ultimate Strength, MPa, Min. |
Surface, Max |
| Prod. Hardness, Rockwell |
| Core |
| Min. |
Max. |
|
Property Class Indent Marking |
| 4.6 |
M5-M100 |
low
or medium carbon steel |
225 |
240 |
400 |
-- |
B67 |
B95 |
4.6 |
| 4.8 |
M1.6 M16 |
low or medium carbon steel, fully or partially annealed |
310 |
340 |
420 |
-- |
B74 |
B95 |
4.8 |
| 5.8 |
M5-M24 |
low or medium carbon steel, cold worked |
380 |
420 |
520 |
-- |
B82 |
B95 |
5.8 |
| 8.8 |
M16-M72 |
medium carbon steel, quenched and tempered |
600 |
660 |
830 |
30N56 |
C23 |
C34 |
8.8 |
A325M
Type 1 |
M16-M36 |
A325M 8S |
| 8.8 |
M16-M36 |
low carbon boron steel, quenched and tempered |
600 |
660 |
830 |
30N56 |
C23 |
C34 |
8.8 |
A325M
Type 2 |
A325M 8S |
A325M
Type 3 |
M16-M36 |
atmospheric corrosion resistant steel, quenched and tempered |
600 |
660 |
830 |
30N56 |
C23 |
C34 |
A325M 8S3 |
| 9.8 |
M1.6-M16 |
medium carbon steel, quenched and tempered |
650 |
720 |
900 |
30N58 |
C27 |
C36 |
9.8 |
| 9.8 |
M1.6-M16 |
low carbon boron steel, quenched and tempered |
650 |
720 |
900 |
30n58 |
C27 |
C36 |
9.8 |
| 10.9 |
M5 - M20 |
medium carbon steel, quenched and tempered |
830 |
940 |
1040 |
30N59 |
C33 |
C39 |
10.9 |
| 10.9 |
M5 - M100 |
medium carbon alloy steel, quenched and tempered |
830 |
940 |
1040 |
30N59 |
C33 |
C39 |
10.9 |
A490M
Type 1 |
A490M 10S |
| 10.9 |
M5 -M36 |
low carbon boron steel, quenched and tempered |
830 |
940 |
1040 |
30N59 |
C33 |
C39 |
10.9 |
A490M
Type
2 |
M12 - M36 |
A490M 10S |
A490M
Type 3 |
M12 - M36 |
atmospheric corrosion resistant steel, quenched and tempered |
830 |
940 |
1040 |
30N59 |
C33 |
C39 |
A490M 10S |
| 12.9 |
M1.6 - M100 |
alloy steel, quenched and tempered |
970 |
1100 |
1220 |
30N63 |
C38 |
C44 |
12.9 |
|
