Product Description

Copper Mould Tube Technical Specification

1. Application

• Used in Continuous Casting Machine (CCM)
• Function: Rapid solidification of molten steel to form billet/bloom/round sections

2. Raw Material / Grade

Typical materials used:

• Cu-DHP (TP2) standard billets
• Cu-Ag (Silver bearing copper) high thermal load
• Cu-Cr-Zr high strength & long life
• Optional: CuNiBe, CuCoNiBe alloys

Required Properties:

• High thermal conductivity
• High strength at elevated temperature
• Good wear & fatigue resistance

3. Size & Dimensions

Shape Types:

• Square / Rectangular
• Round
• Beam blank / Slab

Typical Size Range:

• Square Billet: 60 60 mm to 700 700 mm
• Bloom: 135 430 mm to 550 720 mm
• Round: 80 mm to 1000 mm

Length:

• 700 mm 1000 mm (standard)
• Up to 1100 mm depending on design

Wall Thickness:

• 6 mm 24 mm (typical)
• Up to 40 mm for large sections

4. Taper Design

• Single taper / Multi-taper / Parabolic taper
• Typical taper:
  • 0.6 0.7 % per meter (standard)
  • Up to 0.9 % per meter for larger billets

Purpose:

• Compensates shrinkage of solidifying steel
• Prevents cracks and sticking

5. Coating (Inner Surface)

Standard Coatings:

• Hard Chrome (Cr) plating
• Nickel (Ni) coating
• Ni-Cr / Ni-Fe / Ni-Co alloy coating
• Ceramic coating (optional)

Typical Coating Thickness:

• 0.06 0.12 mm (Chrome)

Hardness:

• HV 600 (Chrome layer)

6. Cooling System Parameters

• Cooling Type: Water-cooled jacket
• Water gap: 5 7 mm
• Flow velocity: 8 15 m/s
• Pressure: 0.5 1.2 MPa

Uniform cooling is critical for:

• Shell formation
• Avoiding breakout

7. Mechanical & Physical Properties

• High thermal conductivity (> 300 W/mK approx.)
• High hardness and wear resistance
• Low elongation under high temperature
• Resistance to thermal fatigue & distortion

8. Structural Design

• Tubular mould with outer water jacket
• Straight or curved (arc type CCM)

Internal Geometry:

• Single taper / Multi-taper / Parabolic
• Corner radius: 3 10 mm (depending on section)

9. Performance Requirements

• Fast heat extraction
• Uniform solid shell formation
• High casting speed capability
• Minimum surface defects
• Long service life

10. Inspection & Quality Control

• Chemical composition test
• Hardness testing
• Dimensional inspection (CMM/PLC-based)
• Taper measurement with taper monitoring system

11. Service Life

• Depends on:
  • Steel grade
  • Casting speed
  • Cooling efficiency
• Inner coating wear determines replacement cycle

12. Optional Features

• Anti-sticking coating
• High-speed casting design
• Customized taper design
• Laser-marked identification