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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI P20+Ni is a low-alloy tool steel with enhanced nickel content, providing superior toughness and improved machinability compared to standard P20 steel. The nickel addition refines the grain structure and enhances the steel's resistance to thermal fatigue and stress corrosion. The microstructure consists of tempered martensite with fine carbide precipitates, ensuring excellent dimensional stability during machining and service.
Heat Treatment Process
MetalZenith employs a controlled heat treatment process involving austenitizing at 845-870°C, followed by oil quenching and tempering at 540-650°C to achieve the desired hardness range. The steel is typically supplied in the pre-hardened condition at 28-32 HRC, eliminating the need for post-machining heat treatment and reducing the risk of distortion in complex mold geometries.
Manufacturing Process
Our manufacturing process begins with electric arc furnace melting followed by ladle refining and vacuum degassing to ensure optimal cleanliness. The steel undergoes controlled forging or rolling to achieve the desired mechanical properties and grain flow orientation. Advanced ultrasonic testing and magnetic particle inspection ensure internal soundness and surface integrity.
Quality Standards
MetalZenith maintains strict adherence to international quality standards including ISO 9001:2015, ASTM A681, and customer-specific requirements. Each production lot undergoes comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical property verification, and microstructural examination. Certificates of compliance and test reports are provided with every shipment, ensuring full traceability and quality assurance.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.28 - 0.40 |
| Manganese (Mn) | 0.60 - 1.00 |
| Silicon (Si) | 0.20 - 0.80 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 1.40 - 2.00 |
| Nickel (Ni) | 0.90 - 1.50 |
| Molybdenum (Mo) | 0.15 - 0.40 |
| Aluminum (Al) | 0.50 - 1.50 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 965 - 1100 MPa |
| Yield Strength (0.2% offset) | 795 - 930 MPa |
| Elongation | 12 - 16% |
| Reduction of Area | 40 - 50% |
| Hardness (Pre-hardened) | 28 - 32 HRC |
| Hardness (Heat Treated) | 48 - 52 HRC |
| Impact Energy (Charpy V-notch) | 25 - 35 J |
| Fatigue Limit (10&sup7; cycles) | 450 - 520 MPa |
| Modulus of Elasticity | 210 GPa |
| Poisson's Ratio | 0.27 - 0.30 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1420 - 1460°C |
| Thermal Conductivity (20°C) | 29 W/m·K |
| Thermal Conductivity (400°C) | 32 W/m·K |
| Thermal Expansion (20-100°C) | 11.5×10-6/K |
| Thermal Expansion (20-400°C) | 12.8×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity | 0.25 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 760°C |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Round bars, flat bars, plates, blocks, forged pieces |
| Round Bar Diameter | 10 - 500 mm |
| Flat Bar Thickness | 10 - 200 mm |
| Plate Thickness | 20 - 300 mm |
| Maximum Dimensions | 2000 × 1000 × 500 mm |
| Standards | ASTM A681, DIN 1.2311, JIS SKT4, GB 3Cr2Mo |
| Surface Finish | Black, machined, ground, polished |
| Dimensional Tolerance | h9 to h11 (standard), h6 to h8 (precision) |
| Length Tolerance | +0/-5 mm (standard), ±1 mm (precision) |
| Straightness | ≤ 1 mm/m |
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Our Advantages in Processing AISI P20+Ni
Advanced Vacuum Melting Technology
MetalZenith utilizes state-of-the-art vacuum induction melting (VIM) and vacuum arc remelting (VAR) processes to produce AISI P20+Ni with exceptional cleanliness and homogeneity. Our controlled atmosphere melting eliminates inclusions and ensures optimal nickel distribution throughout the steel matrix.
Precision Heat Treatment Control
Our computer-controlled heat treatment facilities provide precise temperature and atmosphere control, ensuring consistent hardness levels and optimal microstructure. Advanced quenching and tempering processes guarantee uniform mechanical properties and dimensional stability across all product forms.
Comprehensive Customization Services
MetalZenith offers extensive customization capabilities including precision machining, surface treatments, and custom dimensions. Our global supply chain network ensures rapid delivery worldwide, while our technical support team provides expert guidance for specific mold design requirements.
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