Stainless Steel Round Bar 1.4044.6 / X22CrNi17 / AISI 431C
General Description
The round bar made from stainless steel grade 1.4044.6 (European equivalent X22CrNi17, American equivalent AISI 431C) is a martensitic corrosion-resistant steel with high chromium content and nickel addition. This grade combines high strength, hardness, and good corrosion resistance after heat treatment.
Chemical Composition of 1.4044.6 / X22CrNi17 / AISI 431C (in %):
| Element | Content |
|---|---|
| Carbon (C) | 0.17–0.25 |
| Chromium (Cr) | 15.50–17.50 |
| Nickel (Ni) | 1.50–2.50 |
| Manganese (Mn) | ≤ 1.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
Mechanical Properties:
| Property | Value |
|---|---|
| Yield Strength | ≥ 600 MPa |
| Ultimate Tensile Strength | 850–1000 MPa |
| Elongation (A5) | ≥ 12% |
| Hardness (after quenching and tempering) | 28–40 HRC |
| Impact Toughness (KCU) | ≥ 40 J/cm² |
| Reduction of Area (Z) | ≥ 40% |
Applications
Stainless steel grade 1.4044.6 is widely used for manufacturing:
- Pump and compressor shafts
- Turbine components
- Fasteners
- Springs
- Valves
- Shipbuilding screw shafts
- Shut-off valve parts
- Chemical equipment components
- Products exposed to seawater
- High-strength and corrosion-resistant components
Features
- High corrosion resistance in atmospheric and mildly aggressive environments
- Excellent hardenability
- Good machinability for cutting
- Heat-treatable for enhanced strength
- Magnetic properties in all conditions
- Resistance to pitting corrosion
- Weldable with preheating
Technical Specifications
| Property | Value |
|---|---|
| Density | 7.7 g/cm³ |
| Quenching Temperature | 1000–1050°C |
| Tempering Temperature | 150–200°C |
| Forging Temperature Range | 1180–850°C |
| Thermal Conductivity | 25 W/(m·K) |
| Elastic Modulus | 200 GPa |
| Operating Temperature | Up to 400°C |
Delivery
The product is supplied as calibrated bars of various diameters. The steel exhibits dimensional stability after heat treatment and high surface quality. Each batch is accompanied by a quality certificate verifying its chemical composition and mechanical properties.
Recommendations
- Heat Treatment: Quenching followed by low tempering is recommended for optimal properties.
- Machining: Use tools specifically designed for stainless steel and adhere to appropriate cutting parameters.
Applications Across Industries
- Mechanical Engineering: Components requiring high strength and corrosion resistance.
- Chemical Industry: Equipment and fittings for mildly aggressive environments.
- Shipbuilding: Parts for marine mechanisms and structures.
This steel is ideal for applications where a combination of high strength and corrosion resistance is essential.
Forms made of steel 1.4044.6 / X22CrNi17 / AISI 431C
Steel round bar | |
| Steel grade | Diameters (mm) |
| 1.4044.6 / X22CrNi17 / AISI 431C | 8 – 120 |
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