CD4MCU Super Stainless Steel Round Bar / Rod Diameter 10 - 350mm Hot Rolled Steel Bars

Products Specification

Introduction

CD4MCU is a duplex (ferritic-austenitic) stainless steel known for its high strength, excellent corrosion resistance (especially in chloride environments), and good wear resistance. It contains a balanced microstructure of austenite and ferrite, along with additions of copper (Cu) and molybdenum (Mo) for enhanced performance in aggressive environments.

Key Parameters

• Chemical Composition (Typical %)

  • C: ≤0.04

  • Cr: 24.5–26.5

  • Ni: 4.75–6.00

  • Mo: 1.75–2.25

  • Cu: 2.75–3.25

  • N: 0.10–0.25

  • Fe: Balance

• Mechanical Properties

  • Tensile Strength: 750–1000 MPa

  • Yield Strength: ≥550 MPa

  • Elongation: ≥15%

  • Hardness: ≤290 HB

• Physical Properties

  • Density: ~7.8 g/cm³

  • Melting Point: ~1420–1460°C

Standards

• ASTM A995/A995M (Castings for pressure-containing parts)

• ASTM A890 (Similar duplex stainless steel castings)

• UNS J93370 (Unified Numbering System designation)

Key Features

1. Superior Corrosion Resistance: Resists pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride-rich environments (e.g., seawater, chemical processing).

2. High Strength: Nearly double the yield strength of standard austenitic steels (e.g., 316L).

3. Wear & Erosion Resistance: Ideal for abrasive/erosive conditions.

4. Good Weldability: Requires proper techniques (e.g., low heat input, post-weld annealing).

Similar Grades

• F51 (1.4462) / 2205: Lower Cu content, widely used duplex steel.

• F55 (1.4501) / 2507: Super duplex with higher Cr, Mo, and Ni.

• CD3MN (F53): Another duplex grade but without Cu.

Applications

• Oil & Gas: Subsea components, valves, pumps.

• Chemical Processing: Reactors, heat exchangers, piping.

• Marine Engineering: Propeller shafts, seawater systems.

• Power Plants: Flue gas desulfurization (FGD) systems.

• Pulp & Paper Industry: Bleaching equipment.

This summary provides a concise yet comprehensive technical profile of CD4MCU round bars. Let me know if you need further details!

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