20 Years Experience | 1000+ Brand Partners | Full Customization
We have 20 years of industry experience, have partnered with over 1,000 brands, and support any customization needs.
Technical Specifications
Product Overview
Metallurgical Characteristics
AISI 440C is a high-carbon martensitic stainless steel with exceptional hardness and wear resistance. The high carbon content (0.95-1.20%) combined with chromium (16-18%) provides excellent hardenability and corrosion resistance. MetalZenith's controlled melting process ensures uniform carbide distribution and optimal microstructural development.
Heat Treatment Process
MetalZenith employs precise heat treatment cycles for AISI 440C: annealing at 870-900°C followed by slow cooling, hardening at 1010-1065°C with oil or air quenching, and tempering at 150-200°C for maximum hardness or 200-300°C for improved toughness. Our computer-controlled furnaces ensure consistent results with minimal distortion.
Manufacturing Process
Our production process begins with electric arc furnace melting followed by AOD refining for precise chemistry control. Secondary refining through ladle metallurgy ensures low inclusion content. Hot rolling, cold working, and precision machining capabilities allow MetalZenith to deliver products in various forms with tight dimensional tolerances.
Quality Standards & Testing
MetalZenith maintains compliance with ASTM A276, A314, A479, and AMS 5630 standards. Comprehensive testing includes chemical analysis by optical emission spectroscopy, mechanical property verification, hardness testing, microstructural examination, and ultrasonic inspection. Full material traceability and certification packages are provided with every shipment.
Corrosion Resistance & Performance
AISI 440C offers good corrosion resistance in mild environments, superior to carbon steels but lower than austenitic stainless steels. The material excels in applications requiring high hardness, wear resistance, and moderate corrosion resistance. MetalZenith can provide specialized surface treatments including nitriding and coating for enhanced performance in demanding applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.95 - 1.20 |
| Chromium (Cr) | 16.00 - 18.00 |
| Molybdenum (Mo) | 0.75 max |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Nickel (Ni) | 0.60 max |
| Copper (Cu) | 0.50 max |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | 1790 - 2070 MPa | Hardened & Tempered |
| Yield Strength (0.2% offset) | 1650 - 1930 MPa | Hardened & Tempered |
| Elongation | 2 - 5% | Hardened & Tempered |
| Reduction of Area | 15 - 25% | Hardened & Tempered |
| Hardness (Rockwell C) | 58 - 62 HRC | Hardened & Tempered |
| Impact Energy (Charpy V-notch) | 15 - 25 J | Room Temperature |
| Fatigue Limit (10&sup7; cycles) | 800 - 900 MPa | Rotating Bending |
| Elastic Modulus | 200 GPa | Room Temperature |
| Poisson's Ratio | 0.27 - 0.30 | Room Temperature |
🔬 Physical Properties
| Property | Value | Temperature |
|---|---|---|
| Density | 7.70 g/cm³ | 20°C |
| Melting Point | 1480 - 1530°C | - |
| Thermal Conductivity | 24.2 W/m·K | 100°C |
| Thermal Expansion Coefficient | 10.2×10-6/K | 20-100°C |
| Specific Heat Capacity | 460 J/kg·K | 20°C |
| Electrical Resistivity | 0.60 µΩ·m | 20°C |
| Magnetic Permeability | Ferromagnetic | Hardened Condition |
| Curie Temperature | 760°C | - |
| Thermal Diffusivity | 6.8×10-6 m²/s | 100°C |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Round bars, flat bars, sheets, plates, tubes, forgings | ASTM A276, A314, A479 |
| Round Bar Diameter | 6mm - 300mm | ASTM A276 |
| Flat Bar Dimensions | 10mm - 100mm thickness, up to 300mm width | ASTM A276 |
| Sheet Thickness | 0.5mm - 6mm | ASTM A240 |
| Plate Thickness | 6mm - 100mm | ASTM A240 |
| Surface Finish | Hot rolled, cold drawn, ground, polished | Per customer specification |
| Dimensional Tolerance | ±0.1mm to ±0.5mm depending on form | ASTM standards |
| Length | Up to 6 meters (custom lengths available) | Customer specification |
| Heat Treatment Condition | Annealed, hardened & tempered, stress relieved | AMS 5630, AMS 5880 |
Let Us Create Success for Your Project
Professional Team, Premium Products, Complete Service - Your Project Success is Our Mission
Our Advantages in Processing AISI 440C
Advanced Vacuum Melting Technology
MetalZenith employs state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce ultra-clean AISI 440C with minimal inclusions and superior homogeneity. Our controlled atmosphere melting ensures precise carbon content and optimal carbide distribution for maximum performance.
Precision Heat Treatment Control
Our computer-controlled heat treatment facilities feature advanced atmosphere control and precise temperature monitoring systems. MetalZenith's proprietary heat treatment cycles optimize hardness, toughness, and dimensional stability while minimizing residual stress and distortion in AISI 440C components.
Comprehensive Testing & Customization
MetalZenith offers complete material characterization including microstructural analysis, corrosion testing, and fatigue evaluation. Our engineering team provides custom heat treatment specifications, specialized surface treatments, and precision machining services to meet exact customer requirements for critical applications.
YOUR TRUSTED STEEL
MANUFACTURING PARTNER
Quick Inquiry
Industries We Serve
Professional steel solutions across major industries
Qualifications & Certifications
