We are a leading supplier and wholesaler of different grade of steel bar including H21 Steel Round Bar, which is a hot work tool steel Bar for oil or air solidifying to grow high hot quality, warmth checking resistance and maintenance of hardness. These type of steel mostly utilized as hot work devices and many other applications.
Chemical Composition :-
- C : 0.26 to 0.36%
- Si : 0.15 to 0.50%
- Mn : 0.15 to 0.40%
- Cr : 3.00 to 3.75%
- V : 0.30 to 0.60%
- W : 8.00 to 9.00%
- P : 0.03%
- S : 0.03%
Heat Treatment :-
- Soft anealing : 780 â 810 Â°C
- Cooling : Slow process
- Hardness : Max. 240 HB
- Hardening : 1000-1130Â°C
- Quenching : Oil or hot bath, 600 â 650Â°C
- Hardness after quenching HRC : 53
- Used for hot working dies and toolings
- Used to manufacture hollows, rivets, screws, nuts & bolts.
- Also used in die casting tools, die inserts, forming dies, hot shear blades.