AISI 4135 Steel Foil/Strip

AISI 4135 Steel Foil Product Information -:- For detailed product information, please contact sales. -: AISI 4135 Steel Foil Synonyms -:- For detailed product information, please contact sales. -:

AISI 4135 Steel Product Information -:- For detailed product information, please contact sales. -: ### **AISI 4135 Alloy Steel: A Comprehensive Product Overview** **Introduction** AISI 4135 steel is a versatile, medium-carbon, chromium-molybdenum (Cr-Mo) alloy steel. It is renowned for its excellent combination of strength, toughness, and hardenability. The addition of chromium and molybdenum allows it to be effectively heat-treated (through quenching and tempering) to achieve a wide range of mechanical properties, making it suitable for demanding applications where high strength and good fatigue resistance are required. **1. Chemical Composition** The composition is the foundation of 4135 steel's properties. Key alloying elements include: | Element | Composition Range (% by weight) | Primary Function | | :--- | :--- | :--- | | Carbon (C) | 0.33 - 0.38 | Provides core strength and hardness through heat treatment. | | Manganese (Mn)| 0.70 - 0.90 | Increases hardenability and strength. | | Phosphorus (P) | ≤ 0.035 | Residual element (kept low for ductility). | | Sulfur (S) | ≤ 0.040 | Residual element (kept low for ductility and impact strength). | | Silicon (Si) | 0.15 - 0.35 | Deoxidizer during steelmaking, increases strength. | | Chromium (Cr) | 0.80 - 1.10 | Enhances hardenability, wear resistance, and high-temperature strength. | | Molybdenum (Mo)| 0.15 - 0.25 | Improves hardenability, strength at elevated temperatures, and reduces temper brittleness. | *Note: This is the standard AISI specification. Specific mills or standards (like ASTM) may have slight variations.* **2. Physical & Mechanical Properties** Properties vary significantly with heat treatment condition (e.g., annealed, normalized, or quenched & tempered). The following are typical values for quenched and tempered 4135 steel. * **Physical Properties:** * Density: 7.85 g/cm³ (0.284 lb/in³) * Melting Point: ~1427°C (2600°F) * Modulus of Elasticity: 190-210 GPa (29,000-30,500 ksi) * Poisson's Ratio: 0.29 * **Typical Mechanical Properties (Quenched & Tempered):** * **Tensile Strength:** 850 - 1000 MPa (123,000 - 145,000 psi) * **Yield Strength:** 700 - 850 MPa (102,000 - 123,000 psi) * **Elongation (in 50mm):** 18% - 22% * **Reduction of Area:** 50% - 60% * **Hardness (Brinell):** 248 - 302 HB (approximate, depends on tempering temperature) * **Impact Charpy V-Notch:** 40 - 60 J (30 - 45 ft-lb) at room temperature. **3. Product Applications** AISI 4135 is widely used in industries that require strong, durable, and reliable components. Common applications include: * **Automotive & Transportation:** Axle shafts, drive shafts (propeller shafts), crankshafts, connecting rods, high-strength bolts, and gears. * **Oil & Gas:** Drill collars, tool joints, valve components, and other downhole and surface equipment requiring high strength-to-weight ratio and fatigue resistance. * **Aerospace:** Aircraft landing gear components, engine mounts, and other structural parts. * **General Engineering:** High-strength fasteners, spindles, hydraulic rods, and machine parts subjected to high stress and wear. * **Power Transmission:** Gears, shafts, and couplings in heavy machinery. **4. International Standards & Equivalent Grades** AISI 4135 is recognized under various international designations. Key equivalents include: | Standard | Designation | Note | | :--- | :--- | :--- | | **AISI / SAE (USA)** | **4135** | The standard reference. | | **ASTM (USA)** | A29 / A322 (Grade 4135) | Standard specification for steel bars. | | **UNS** | G41350 | Unified Numbering System. | | **DIN (Germany)** | 34CrMo4 / 1.7220 | A very common direct equivalent in Europe. | | **EN (Europe)** | 1.7220 / 34CrMo4 | | | **JIS (Japan)** | SCM435 | A very close equivalent, minor compositional differences. | | **GB (China)** | 35CrMo | A close equivalent, widely used. | **5. Heat Treatment** AISI 4135 is almost always used in a heat-treated condition. * **Annealing:** Heated to ~845°C (1550°F) and slowly cooled to soften for machining. * **Normalizing:** Heated to ~900°C (1650°F) and air-cooled to refine grain structure. * **Quenching & Tempering (Typical):** * **Austenitizing:** Heated to ~850°C - 870°C (1560°F - 1600°F). * **Quenching:** Rapidly cooled in oil (common) or water. * **Tempering:** Reheated to a temperature between 540°C - 650°C (1000°F - 1200°F) to achieve the desired combination of strength and toughness, followed by air cooling. **Conclusion** AISI 4135 steel is a high-performance alloy that offers an outstanding balance of strength, toughness, and manufacturability. Its well-defined chemistry, tunable through heat treatment, and wide international acceptance make it a preferred material of choice for critical, high-stress components across the automotive, energy, and general engineering sectors. When selecting 4135, it is crucial to specify the required heat treatment condition to ensure it meets the mechanical property demands of the specific application. -:- For detailed product information, please contact sales. -: AISI 4135 Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6201 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 4135 Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 4135 Steel Foil -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 4135 Steel Foil -:- For detailed product information, please contact sales. -:

Packing of AISI 4135 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 2672 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