Stainless steel 1.4472 / X4CrNiMnMo 21-9-4

✅ General Technical Characteristics

Stainless steel 1.4472 (X4CrNiMnMo 21-9-4) is a high-alloy austenitic stainless steel known for its excellent corrosion resistance and high mechanical strength. This alloy has a balanced composition of chromium, nickel, manganese, and molybdenum, ensuring durability in aggressive environments, including acidic and chloride conditions.
Main Characteristics:
High resistance to corrosion, including pitting and crevice corrosion.
Excellent mechanical strength and hardness.
Good weldability and machinability.
Stability under high mechanical loads and extreme conditions.
Enhanced durability in marine and chemical environments.
🔬 Chemical Composition of 1.4472 / X4CrNiMnMo 21-9-4 (%)Carbon (C): ≤ 0.04
Silicon (Si): ≤ 1.0
Manganese (Mn): 5.0 – 7.0
Phosphorus (P): ≤ 0.040
Sulfur (S): ≤ 0.015
Chromium (Cr): 20.0 – 22.0
Nickel (Ni): 8.0 – 10.0
Molybdenum (Mo): 2.0 – 3.0
Nitrogen (N): 0.10 – 0.20
💡 The combination of chromium, nickel, and molybdenum provides superior corrosion resistance, making this steel suitable for extreme operating conditions.
🏭 Applications

Steel 1.4472 (X4CrNiMnMo 21-9-4) is widely used in industries requiring high strength and resistance to aggressive environments.
Main Application Areas:
Chemical and petrochemical industry (storage tanks, pipelines, processing equipment).
Marine and offshore structures (shipbuilding, underwater components).
Aerospace industry (aircraft parts, engine components).
Food and pharmaceutical industries (hygienic equipment, processing units).
Energy sector (heat exchangers, nuclear plant components).
📊 Mechanical Properties

Tensile Strength (Rm): 650 – 850 MPa
Yield Strength (Rp0.2): ≥ 300 MPa
Hardness (HB): ≤ 260 HB
Elongation (A5): ≥ 35 %
⭐ Features

High corrosion resistance – withstands harsh environments, including acidic and chloride exposure.
Excellent mechanical strength – ensures durability under extreme stress.
Good weldability – suitable for various industrial applications.
Resistance to pitting and crevice corrosion – ideal for marine and chemical industries.
Long service life – maintains stability and reliability in demanding conditions.

Forms of delivery of steel products EN 1.4472