MANUFACTURING CAPABILITIES

Stelco Limited make Hardened & Tempered Medium & High Carbon Steel Strips, used for wide applications in special industrial uses. It has excellent spring properties, uniform hardness and texture, It has precision blanking ability and rationalizes further processing by eliminating post heat treatment & distortion and thereby increases productivity.

Heat treatment is the heating and cooling of metals to change their physical and mechanical properties, without letting it change its shape. Heat treatment could be said to be a method for strengthening materials but could also be used to alter some mechanical properties such as improving formability, machining, etc. The process of heat treatment involves the use of heating or cooling, usually to extreme temperatures to achieve the wanted result. It is very important manufacturing processes that can not only help manufacturing process but can also improve product, its performance, and its characteristics in many ways.

Heat Treatment Processes involves Hardening & Tempering as 

Hardening

Hardening involves heating of steel, keeping it at an appropriate temperature until all pearlite is transformed into austenite, and then quenching it rapidly in oil. The temperature at which austentizing rapidly takes place depends upon the carbon content in the steel used. The heating time should be increased ensuring that the core will also be fully transformed into austenite. The microstructure of a hardened steel part is martensite.

Tempering

Tempering involves heating steel that has been quenched and hardened for an adequate period of time so that the metal can be equilibrated. The hardness and strength obtained depend upon the temperature at which tempering is carried out. Higher temperatures will result into high ductility, but low strength and hardness. Low tempering temperatures will produce low ductility, but high strength and hardness. In practice, appropriate tempering temperatures are selected that will produce the desired level of hardness and strength. This operation is performed on all carbon steels that have been hardened, in order to reduce their brittleness, so that they can be used effectively in desired applications.


Subject to limitations as per the following chart

Width 400 mm
Thickness 0.15mm
Surface Roughness Ra 0.60  maximum µm.
Finish Bright/Blue/ Bronze & Grey
Edges Sheared, Round & Square Edge
Flatness Maximum 0.025mm/25 mm width
Grades High/Medium Carbon & Alloy Steel
Camber 1.00mm per 1000mm
Cut Length Max length 3000mm + 5mm- Nil,
Minimum Length 500mm + 5mm – Nil
Coil Weight 1Kg/mm-5Kg/mm
Packing Coils Lightly Oiled & Wrapped In Protective/ Seaworthy Packing

SIZES AVAILABLE OF HARDENED AND TEMPERED STEEL STRIPS

SPECIFICATIONS

THICKNESS (mm)

WIDTH (mm)

C-50, 55C6, C-60, 65C6, 70C6, 75C6, 80C6, 85C6, 98C6, 50CrV4,
SK-4, SK-5, 75Cr1

0.20-0.50

30-250

0.50-1.00

20-350

1.00-2.00

10-400

2.00-4.00

15-400

 

MECHANICAL PROPERTIES

GRADE

HARDENED & TEMPERED

HARDNESS (HV)

U.T.S. (N/mm2)

C-55, C-62, C-65, C-75, C-80, C-85,
C-98, 50CrV4

280-320

900-1030

320-350

1030-1130

350-380

1130-1220

380-420

1220-1350

420-450

1350-1460

450-480

1460-1560

480-520

1560-1700

520-550

1700-1810


The sizes are supplied in desired hardness in Grey, Bright Polished, Blue or Bronze finish with either sheared or dressed edges.

 


MANUFACTURING CAPABILITIES
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