BRITISH
STANDARD |
GRADE |
U.S.A. |
UTS
N/mm2 |
PROPERTIES |
BS3100: 1991
|
A1 |
ASTM A27 Gr. 60-30 |
430 |
Structural,
weldable mild steel. |
| A2 |
ASTM A27 Gr. 70-36 |
490 |
Structural,
weldable mild steel. |
| A3 |
ASTM A148 Gr.
80-40 |
540 |
Structural medium
tensile steel. |
| AW1 |
- |
- |
For blank
carburising |
| AW2 |
- |
620 |
Good
wear resistance and suitable for surface
hardening. |
| AW3 |
- |
690 |
| A4 |
ASTM A148 Gr.
80-50 |
540 - 690 |
1.5% Mn steel
medium strength, good weldability. |
| A5 |
ASTM A148 Gr.
90-60 |
620 - 770 |
1.5%Mn steel to
4" section |
| A6 |
ASTM A148 Gr.
105-85 |
690 - 850 |
1.5% Mn steel,
higher tensile than above up to 2.5" section. |
