AISI 4047H Steel Foil/Strip

AISI 4047H Steel Foil Product Information -:- For detailed product information, please contact sales. -: AISI 4047H Steel Foil Synonyms -:- For detailed product information, please contact sales. -:

AISI 4047H Steel Product Information -:- For detailed product information, please contact sales. -: # Product Introduction: AISI 4047H Alloy Steel (Hardenability-Guaranteed Grade) ## Overview **AISI 4047H** is a high-performance medium-high carbon chromium-molybdenum alloy steel supplied with **guaranteed hardenability characteristics**. The "H" designation signifies that this grade is produced under strict compositional controls to ensure consistent and predictable hardening response during heat treatment, making it superior to standard AISI 4047 for critical applications requiring uniform mechanical properties through cross-sections. ## 1. Chemical Composition (H-Steel Specification) | Element | Content Range (%) | Role in Hardenability Control | |---------|-------------------|-------------------------------| | **Carbon (C)** | 0.44 - 0.50 | Primary hardening element; tightly controlled to maintain consistent hardenability band | | **Manganese (Mn)** | 0.70 - 0.95 | Major hardenability enhancer; range optimized for predictable Jominy curve | | **Phosphorus (P)** | ≤ 0.030 | Impurity element (lower maximum than standard grade) | | **Sulfur (S)** | ≤ 0.035 | Impurity element (lower maximum than standard grade) | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer and solid solution strengthener | | **Chromium (Cr)** | 0.20 - 0.35 | Enhances hardenability and wear resistance; controlled for band consistency | | **Molybdenum (Mo)** | 0.15 - 0.25 | Provides hardenability, high-temperature strength, and reduces temper embrittlement | **Critical Note**: Unlike standard grades, H-steels are certified to meet specific **end-quench (Jominy) hardenability bands** rather than just chemical composition ranges. The actual acceptable composition for each heat is determined by the steel producer to achieve the specified hardenability band. ## 2. Physical & Mechanical Properties ### Physical Properties - **Density**: 7.85 g/cm³ (0.283 lb/in³) - **Melting Point**: Approximately 1420-1460°C (2590-2660°F) - **Modulus of Elasticity**: 205 GPa (29.7 × 10⁶ psi) - **Poisson's Ratio**: 0.29 - **Thermal Conductivity**: 42.6 W/m·K at 100°C - **Coefficient of Thermal Expansion**: 11.5 × 10⁻⁶/°C (20-100°C) ### Guaranteed Hardenability Characteristics AISI 4047H is supplied with certified Jominy hardenability bands per SAE J1268. Typical characteristics: - **Surface Hardness After Quenching**: 58-62 HRC (depending on section size) - **Core Hardness Consistency**: Minimal hardness drop from surface to center in specified sections - **Jominy Band Width**: Typically 5-7 HRC points at each Jominy distance ### Typical Mechanical Properties (After Quenching & Tempering) | Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRC) | |-----------|------------------------|----------------------|----------------|----------------| | **Quenched & Low-Temp Tempered** | 1500-1800 | 1300-1600 | 8-12 | 50-55 | | **Quenched & Medium-Temp Tempered** | 1200-1400 | 1000-1200 | 12-16 | 40-45 | | **Quenched & High-Temp Tempered** | 900-1100 | 800-1000 | 15-20 | 30-35 | ## 3. Heat Treatment Characteristics ### Hardenability Performance - **Ideal Critical Diameter (Dᵢ)**: Approximately 75-95 mm (3.0-3.75 inches) in oil quench - **Grossmann Hardenability Factor**: Excellent due to combined Cr-Mo alloying - **Quenching Medium**: Primarily oil quenching recommended for optimal results with minimal distortion ### Standard Heat Treatment Cycles 1. **Annealing**: Heat to 830-850°C (1525-1560°F), slow furnace cool 2. **Normalizing**: 870-890°C (1600-1635°F), air cool 3. **Austenitizing for Hardening**: 830-850°C (1525-1560°F), hold 30-60 minutes per inch of thickness 4. **Quenching**: Oil quench (fast oil recommended for sections >50 mm) 5. **Tempering**: Immediately after quenching, temper at 150-600°C (300-1110°F) based on required properties ### Predictability Advantage The guaranteed hardenability allows for: - Consistent hardness profiles in production batches - Reduced heat treatment rejects - Accurate prediction of mechanical properties in finished parts ## 4. Product Applications ### Primary Industries & Components **Automotive & Heavy Truck Manufacturing:** - High-stress transmission gears - Differential gears and pinions - Heavy-duty axle shafts - Crankshafts for high-performance engines - King pins and steering components - Synchronizer hubs **Aerospace & Defense:** - Landing gear components - High-strength bolts and fasteners - Helicopter rotor components - Missile and armament parts **Industrial Equipment:** - High-load gearbox components - Mining equipment gears and shafts - Oil drilling tool joints - Heavy machinery rollers and bearings - High-pressure hydraulic components **Power Transmission:** - Industrial gear sets - Couplings and shafts - Sprockets for heavy chain drives ## 5. International Standards & Equivalent Grades ### Direct Equivalents | Standard System | Designation | Specification | |-----------------|-------------|---------------| | **SAE/AISI (USA)** | **4047H** | SAE J1268 | | **ASTM (USA)** | **A304** (Standard Specification for H-Steel Bars) | | | **UNS Number** | **H40470** | | | **DIN (Germany)** | **46CrMo4+H** | DIN EN 10083-3 | | **EN (European)** | **1.7235+H** | EN 10083-3 | | **JIS (Japan)** | **SCM445H** | JIS G4052 | | **GB (China)** | **46CrMoH** | GB/T 5216 | ### Related Standards - **SAE J1268**: Hardenability Bands for H-Steels - **ASTM A29**: Steel Bars, Carbon and Alloy, Hot-Wrought and Cold-Finished - **ISO 683-18**: Heat-treatable steels, alloy steels and free-cutting steels ## 6. Special Considerations & Advantages ### Manufacturing Advantages 1. **Consistent Quality**: Reduced variation in heat treatment response 2. **Predictable Performance**: Known hardenability allows precise engineering 3. **Reduced Testing**: Less need for destructive testing in production 4. **Optimized Design**: Enables design to specific strength/hardness gradients ### Processing Guidelines - **Machinability**: Fair to good in annealed condition (65% of B1112) - **Weldability**: Poor; requires pre-heat (315°C/600°F) and post-weld heat treatment - **Forging Temperature**: 1150-900°C (2100-1650°F) - **Surface Treatments**: Excellent candidate for carburizing or nitriding when additional surface hardness required ### Quality Assurance - **Hardenability Certification**: Each lot supplied with Jominy test certification - **Ultrasonic Testing**: Available for critical applications - **Microcleanliness**: Typically supplied to ASTM E45 Method A requirements ## 7. Technical Comparison with Standard 4047 | Parameter | 4047 Standard | 4047H (Guaranteed) | Advantage | |-----------|---------------|---------------------|-----------| | **Hardenability Consistency** | Normal variation | Certified band | Predictable results | | **Core Properties in Large Sections** | Variable | Consistent | Better reliability | | **Heat Treatment Rejects** | Higher potential | Reduced | Cost savings | | **Design Precision** | Conservative margins | Optimized margins | Weight/cost optimization | | **Production Documentation** | Chemical only | Chemical + Jominy data | Better traceability | ## 8. Selection Guidelines **Choose AISI 4047H when:** - Component cross-section exceeds 25 mm (1 inch) - Uniform properties through cross-section are critical - Production volumes justify the premium for consistency - Component failure carries high safety or cost consequences - Just-in-time manufacturing requires predictable heat treatment cycles **Consider standard 4047 when:** - Sections are small (<25 mm) - Cost is primary driver - Post-heat treatment testing can accommodate variability - Applications are non-critical --- **Disclaimer:** The information provided herein is for technical reference purposes. Actual material properties may vary based on manufacturing process, heat treatment parameters, and section size. For critical applications, always consult certified material test reports and qualified metallurgical engineers. Specifications are subject to change; verify current standards with appropriate standards organizations before specification. -:- For detailed product information, please contact sales. -: AISI 4047H Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6192 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. -: AISI 4047H Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 4047H Steel Foil -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 4047H Steel Foil -:- For detailed product information, please contact sales. -:

Packing of AISI 4047H Steel Foil/Strip -:- 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 Foil/Strip 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 2663 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