High Strength Low Alloy (Hsla) Steel

7/26/2019 High Strength Low Alloy (Hsla) Steel

1/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

2/18

HSLA steel

HSLA more resistant to rust and most carbon steel due to less

pearlite and cementite.

Density of HSLA aprox. 7800 kg/m3

HSLA do have limited ductility compared to mild steel.

Highly formable

Weldable

7/26/2019 High Strength Low Alloy (Hsla) Steel

3/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

4/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

5/18

HSLA steel cars, trucks and bridges

Less steel therefore lighter

Cars fuel economy stronger less damage to roadsurface.

Bridges centre span can be longer and need few

supporting beams.

HSLA steel TV masts Thinner section and more stable for less resistance to

the wind.

7/26/2019 High Strength Low Alloy (Hsla) Steel

6/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

7/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

8/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

9/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

10/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

11/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

12/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

13/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

14/18

Distribution of Alloying Elements

Distribution depends upon compound and carbide forming tendency of

each element.

7/26/2019 High Strength Low Alloy (Hsla) Steel

15/18

The durability of HSLA steels

More durable and longer life span. Street lighting, oil storage tank , Earth moving equipment

Bridges, sea structures.

Building reinforcement (cement /steel/ steel/steel)

7/26/2019 High Strength Low Alloy (Hsla) Steel

16/18

Microstructure of HSLA

Strength is increased by

Increasing the amount of pearlite

Increasing the fineness of grain structure

Increasing the amount of hard precipitate

7/26/2019 High Strength Low Alloy (Hsla) Steel

17/18

7/26/2019 High Strength Low Alloy (Hsla) Steel

18/18