THIS IS A MEDIUM CARBON COLD ROLLED STEEL STREP WITH A VERY HIGH YIELD STRENGTH. THIS ALLOWS OBJECTS MADE OF THIS STEEL TO RETURN TO THEIR ORIGINAL SHAPE DESPITE SIGNIFICANT BENDING OR TWISTING AFTER HARDENING AND TEMPERING.
Usually in soft annealed condition but can also be supplied in temper rolled hardness in range between
200-300Hv ( band range is +/-40 Hv )
This grade of steel strip is used where fatigue values and elastic limits are not critical, is used for
applications in which high strength, hardness and wear resistance are important. This grade of steel
strips has good forming, blanking and bending properties.
| Properties of C55 grade cold rolled annealed steel strips Chemical composition by weight | |
|---|---|
| CARBON | 0.50 - 60% |
| MANGANESE | 0.60 - 0.90% |
| SILICON | 0.0 - 0.35% |
| SULPHUR | 0.025% |
| PHOSPHOROUS | 0.025% |
| Physical Properties of C55 grade cold rolled annealed steel strips | |
|---|---|
| HARDNESS IN ANNEALED CONDITION | 200Hv Max |
| YIELD STRENGTH | 270 N/MM2 |
| ELONGATION | 30% Min |
| TENSILE STRENGTH | 590 N/mm2 |
| Bend test When bending maintain radius | ||
|---|---|---|
| THICKNESS | GRAIN WISE | AGAINST GRAINS |
| For thickness 4.00 mm to 2.50 mm | r=2t | not advised |
| For thickness 2.30 mm to 1.20 mm | r=1t | not advised |
| For thickness 1.0 mm to 0.50 mm | r=0t | r=1t |
| For thickness 0.45 mm to 0.20 mm | r=0t | r=0r |
| . |
|---|
| Usually in coils, thicker strips can also be supplied in cut to length and levelled strips |
| Edges are slitted |
| Coil ID 300-500mm as per mutual agreement with buyer |
| Coil weight as per mutual understanding with buyer |
| Surface finish is bright suitable for electroplating |
| . | . | . |
|---|---|---|
| 4.50mm + 0.07mm | 3.50mm + 0.05mm | 3.20mm + 0.05mm |
| 2.80mm + 0.05mm | 2.60mm + 0.04mm | 2.50mm + 0.04mm |
| 2.30mm + 0.04mm | 2.00mm + 0.04mm | 1.80mm + 0.04mm |
| 1.75mm + 0.04mm | 1.50mm + 0.03mm | 1.48mm + 0.03mm |
| 1.20mm + 0.03mm | 1.0mm + 0.03mm | 0.98mm + 0.03mm |
| 0.90mm + 0.03mm | 0.80mm + 0.03mm | 0.70mm + 0.03mm |
| 0.60mm + 0.03mm | 0.50mm + 0.02mm | 0.45mm + 0.02mm |
| 0.55mm + 0.02mm | 0.40mm + 0.02mm | 0.30mm + 0.02mm |
| 0.25mm + 0.02mm | 0.20mm + 0.02mm | |
| . | . |
|---|---|
| PEN CLIPS | HAIR PINS |
| SEAT BELT PARTS, BUCKLES | AGRICULTURE SICKLES |
| MACHETES | AUTOMOTIVE PARTS |
| CHAINS AND LINKS | SHOE SHANKS |
| SAFETY SHOES TOES | FASTENERS |
| WASHERS | HOSE CLAMPS |
| VARIOUS TYPES OF CLAMPS | HOSE CLIPS |
