Latrobe 14-4CrMo Stainless Tool Steel

Latrobe 14-4CrMo Stainless Tool Steel Product Information -:- For detailed product information, please contact sales. -: Latrobe 14-4CrMo Stainless Tool Steel Synonyms -:- For detailed product information, please contact sales. -:

Latrobe 14-4CrMo Stainless Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Datasheet: Latrobe 14-4CrMo Stainless Tool Steel** ## **Overview** Latrobe 14-4CrMo is a premium martensitic precipitation-hardening stainless steel that represents a significant advancement in tool steel technology. This alloy combines the exceptional corrosion resistance of stainless steels with the high strength and hardness characteristics of maraging steels. The 14-4CrMo designation indicates its optimized composition containing 14% chromium with balanced molybdenum additions, engineered to provide superior performance in demanding tooling applications where corrosion resistance, dimensional stability, and high mechanical strength are critical requirements. ## **Product Classification** - **Category:** Precipitation-hardening martensitic stainless tool steel - **Production Method:** Electric arc furnace melting with secondary refining (VIM/VAR optional) - **Key Features:** Ultra-high strength, excellent corrosion resistance, good toughness - **Typical Condition:** Solution annealed or pre-aged for machining ## **Key Advantages** - **Exceptional Strength-to-Weight Ratio:** Ultimate tensile strength up to 1800 MPa - **Superior Corrosion Resistance:** Comparable to 440C stainless steel in most environments - **Excellent Dimensional Stability:** Minimal distortion during aging treatment - **Good Machinability:** In solution annealed condition - **High Temperature Capability:** Maintains properties up to 400°C (750°F) - **Precipitation Hardening:** Single low-temperature aging achieves full properties - **Uniform Properties:** Through-thickness consistency in all sections ## **International Standards & Cross-References** | **Standard System** | **Designation** | **Comparable Grades** | |---------------------|-----------------|------------------------| | **UNS** | S45500 (modified) | Custom alloy | | **AMS** | 5659 (similar) | - | | **AISI/SAE** | Custom PH stainless | - | | **Proprietary Equivalents** | - | Carpenter Custom 465™, Böhler P670 | | **European Designation** | 1.4542 (modified) | - | ## **Chemical Composition** | **Element** | **Content (%)** | **Function** | |-------------|-----------------|--------------| | **Chromium (Cr)** | 13.5-14.5 | Corrosion resistance & hardenability | | **Nickel (Ni)** | 3.5-4.5 | Austenite stabilization & toughness | | **Molybdenum (Mo)** | 0.8-1.2 | Secondary hardening & strength | | **Copper (Cu)** | 1.5-2.0 | Precipitation hardening | | **Carbon (C)** | ≤0.05 | Ultra-low for toughness & corrosion | | **Manganese (Mn)** | ≤0.50 | Deoxidizer | | **Silicon (Si)** | ≤0.50 | Deoxidizer | | **Niobium (Nb)** | 0.10-0.30 | Grain refinement & strengthening | | **Sulfur (S)** | ≤0.010 | Ultra-low for improved properties | | **Phosphorus (P)** | ≤0.015 | Ultra-low for improved toughness | *Proprietary balance of precipitation-hardening elements optimized for tooling applications.* ## **Physical Properties** | **Property** | **Value** | **Conditions** | |--------------|-----------|----------------| | **Density** | 7.80 g/cm³ | 20°C | | **Melting Point** | 1420-1460°C | - | | **Thermal Conductivity** | 19.0 W/m·K | 20°C | | **Specific Heat Capacity** | 460 J/kg·K | 20°C | | **Coefficient of Thermal Expansion** | 10.8 × 10⁻⁶/K | 20-100°C | | **Modulus of Elasticity** | 195 GPa | 20°C | | **Electrical Resistivity** | 0.80 μΩ·m | 20°C | | **Magnetic Permeability** | Ferromagnetic | Hardened condition | ## **Mechanical Properties** ### **Solution Annealed Condition (Condition A)** | **Property** | **Value** | **Test Method** | |--------------|-----------|-----------------| | **Hardness** | 28-32 HRC | ASTM E18 | | **Tensile Strength** | 950-1050 MPa | ASTM E8 | | **Yield Strength (0.2%)** | 750-850 MPa | ASTM E8 | | **Elongation** | 15-18% | ASTM E8 | | **Reduction of Area** | 50-60% | ASTM E8 | | **Impact Toughness** | 80-100 J | ASTM E23 | ### **Aged Conditions** | **Aging Temperature** | **Hardness (HRC)** | **Tensile Strength** | **Yield Strength** | **Elongation** | |----------------------|-------------------|---------------------|-------------------|---------------| | **480°C (900°F)** | 50-52 | 1550-1650 MPa | 1450-1550 MPa | 10-12% | | **510°C (950°F)** | 48-50 | 1450-1550 MPa | 1350-1450 MPa | 12-14% | | **540°C (1000°F)** | 46-48 | 1350-1450 MPa | 1250-1350 MPa | 14-16% | | **565°C (1050°F)** | 44-46 | 1250-1350 MPa | 1150-1250 MPa | 15-17% | *All aged conditions: Double aging treatment (3 hours + 3 hours) recommended* ## **Heat Treatment Specifications** ### **Solution Annealing** - **Temperature:** 1040-1060°C (1900-1940°F) - **Soak Time:** 1 hour per inch of thickness (minimum 30 minutes) - **Cooling:** Rapid air or oil quench to below 30°C (90°F) - **Resulting Condition:** Condition A (machineable state) ### **Precipitation Aging** - **Temperature Range:** 480-565°C (900-1050°F) - **Soak Time:** 3-4 hours (double aging recommended) - **Cooling:** Air cool after aging - **Distortion:** Typically < 0.0005 in/in ### **Stress Relieving** - **After Rough Machining:** 650°C (1200°F) for 2-4 hours - **After Finish Machining:** 540°C (1000°F) for 2 hours - **Cooling:** Slow furnace cool ## **Corrosion Resistance** | **Environment** | **Resistance Rating** | **Notes** | |-----------------|----------------------|-----------| | **Atmospheric** | Excellent | Superior to 410/420 grades | | **Fresh Water** | Excellent | No pitting in most conditions | | **Sea Water** | Good | Suitable for coastal applications | | **Acidic (pH>3)** | Good | Moderate acid resistance | | **Alkaline** | Excellent | Good in basic environments | | **Chloride** | Moderate | Avoid high chloride concentrations | *Note: Corrosion resistance improves with surface finish quality and aging temperature.* ## **Processing Characteristics** ### **Machinability** - **Relative Rating:** 60% (compared to AISI 1018 steel as 100%) - **Cutting Tools:** Carbide recommended for production - **Cutting Speed:** 30-50 m/min (turning) - **Feed Rate:** 0.15-0.30 mm/rev - **Coolant:** Required for optimal tool life ### **Grindability** - **Relative Rating:** 40% (more difficult than 420 stainless) - **Wheel Type:** Aluminum oxide or CBN - **Coolant:** Essential to prevent overheating - **Surface Finish:** Ra 0.4 μm achievable with proper technique ### **Welding** - **Weldability:** Good with proper precautions - **Recommended Process:** GTAW (TIG) with matching filler - **Preheat:** 150-200°C (300-400°F) - **Post-Weld:** Re-solution and age for full properties ## **Typical Applications** ### **Aerospace & Defense** - Missile components and guidance systems - Aircraft structural fittings - Helicopter rotor components - Satellite mechanisms - Ordinance and firearm components ### **Tooling & Molding** - Plastic injection mold components - Die casting inserts and cores - Extrusion dies for corrosive materials - Compression molds - High-wear tooling components ### **Industrial Equipment** - Chemical processing components - Pump shafts and impellers - Valve bodies and stems - Marine hardware - Food processing equipment ### **Precision Components** - Surgical instruments - Analytical instrument parts - Optical equipment mounts - High-stress fasteners - Bearing components ## **Quality Assurance** - **Mill Certification:** Full traceability with chemical and mechanical test reports - **Non-Destructive Testing:** Ultrasonic testing per ASTM A388 - **Microcleanliness:** ASTM E45 Method A, B, D - **Grain Size:** ASTM E112, typically 8-10 - **Hardness Testing:** Rockwell C scale throughout ## **Available Forms & Sizes** - **Round Bars:** 10-300 mm diameter - **Flat Bars:** 10-200 mm thickness, 50-500 mm width - **Forgings:** Custom sizes and shapes - **Billets:** For further processing - **Surface Finish:** Black, ground, or polished ## **Technical Notes** 1. **Storage:** Protect from moisture to prevent surface staining 2. **Handling:** Use clean tools to prevent contamination 3. **Heat Treatment:** Must be performed in controlled atmosphere 4. **Machining:** Remove all decarburized surfaces before aging 5. **Safety:** Standard steel safety protocols apply --- **Latrobe Specialty Metals** *Advanced Materials for Demanding Applications* www.latrobe.com *Note: Specifications subject to change without notice. Users should verify properties for specific applications.* -:- For detailed product information, please contact sales. -: Latrobe 14-4CrMo Stainless Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7216 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Latrobe 14-4CrMo Stainless Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe 14-4CrMo Stainless Tool Steel -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe 14-4CrMo Stainless Tool Steel -:- For detailed product information, please contact sales. -:

Packing of Latrobe 14-4CrMo Stainless Tool Steel -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3687 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition