AISI 4047 Steel Foil/Strip

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

AISI 4047 Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 4047 Alloy Steel** **AISI 4047** is a high-quality, medium-high carbon, chromium-molybdenum (Cr-Mo) alloy steel. It belongs to the same versatile family as 4042 but features a higher carbon content, which results in **greater ultimate tensile strength, higher achievable hardness, and improved wear resistance** after proper heat treatment. Its excellent hardenability, provided by chromium and molybdenum additions, ensures these properties can be achieved in moderately large cross-sections. AISI 4047 is an ideal choice for high-stress components requiring a superior combination of strength, fatigue resistance, and durability. #### **1. Chemical Composition** The composition is the key driver of its enhanced properties compared to lower-carbon grades like 4042. | Element | Content Range (%) | Primary Function | | :--- | :--- | :--- | | **Carbon (C)** | 0.45 - 0.50 | **Higher carbon** provides increased hardness, strength, and wear resistance. It is the primary differentiator from 4042. | | **Manganese (Mn)** | 0.70 - 0.90 | Increases hardenability and strength. | | **Phosphorus (P)** | ≤ 0.035 | Impurity (kept low for toughness). | | **Sulfur (S)** | ≤ 0.040 | Impurity (affects machinability). | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer, increases strength. | | **Chromium (Cr)** | 0.20 - 0.35 | Enhances hardenability, wear resistance, and provides mild corrosion resistance. | | **Molybdenum (Mo)** | 0.15 - 0.25 | Improves hardenability, strength at high temperatures, and reduces temper embrittlement. | #### **2. Physical & Mechanical Properties** Properties are highly dependent on heat treatment. The values below are typical for the quenched and tempered condition. * **Density:** 7.85 g/cm³ (0.284 lb/in³) * **Melting Point:** ~ 1420°C (2590°F) * **Modulus of Elasticity:** 190 - 210 GPa (29 x 10⁶ psi) * **Thermal Conductivity:** ~ 42.6 W/m·K (at 100°C) **Typical Mechanical Properties (After Quenching & Tempering):** * **Tensile Strength:** 900 - 1200 MPa (130 - 175 ksi) *[Higher than 4042]* * **Yield Strength (0.2% Offset):** 700 - 950 MPa (102 - 138 ksi) * **Elongation (in 50mm):** 12 - 18% * **Reduction in Area:** 35 - 50% * **Hardness:** Can be reliably hardened to **50-55 HRC** (quenched), and tempered to various lower hardness levels (e.g., 28-45 HRC) for specific applications. * **Impact Toughness (Charpy V-notch):** Good, but generally slightly lower than 4042 at equivalent hardness due to higher carbon content; proper tempering is crucial to optimize toughness. #### **3. Heat Treatment** AISI 4047 responds excellently to standard heat treatments: * **Annealing:** Full annealing at ~843°C (1550°F) followed by slow cooling to improve machinability. * **Normalizing:** Heated to ~871°C (1600°F) and air-cooled to refine grain structure. * **Hardening (Quenching):** Austenitizing at ~815-845°C (1500-1550°F) followed by quenching in oil. **Oil quenching is standard** due to its high hardenability to minimize distortion and cracking risk. * **Tempering:** **Essential** after quenching. Reheated to 205-650°C (400-1200°F) to achieve the desired balance of hardness, strength, and toughness. Higher tempering temperatures increase toughness but reduce hardness/strength. #### **4. Product Applications** AISI 4047 is used in demanding applications where its higher strength and wear resistance are critical. * **Automotive & Truck:** **Heavy-duty gears** (transmission, differential), **high-strength shafts** (crankshafts, axle shafts for heavy vehicles), **piston pins**, **high-performance connecting rods**, and **suspension components**. * **Agricultural & Construction Machinery:** Highly stressed gears, pinions, track links, and roller bearings. * **Oil & Gas Industry:** **Heavy-duty drill collar joints**, **tool joints**, **mandrels**, and other downhole tools requiring high strength and resistance to abrasion. * **Forgings & Tools:** Used for high-strength forgings and as a material for **large wrenches**, **vises**, **clamps**, and non-cutting tools. * **Aerospace:** Certain high-strength landing gear components and structural parts (in specific grades/qualifications). #### **5. International Standards & Equivalent Grades** AISI 4047 is recognized under various international standards. | Standard | Designation | Note | | :--- | :--- | :--- | | **AISI / SAE (USA)** | 4047 | Primary designation | | **UNS** | G40470 | | | **ASTM (USA)** | A322, A331 (for bar) | | | **DIN (Germany)** | **46CrMo4** (Very close equivalent) | A direct counterpart with nearly identical composition. | | **EN (European)** | **1.7235** | Corresponds to 46CrMo4. | | **JIS (Japan)** | SCM445 | Slightly different spec, but a common equivalent. | | **GB (China)** | 46CrMo | | #### **6. Key Advantages & Considerations** * **Advantages:** * **Higher Strength & Hardness:** Superior to 4042, enabling use in more demanding applications. * **Excellent Wear Resistance:** Ideal for components in frictional contact. * **Good Hardenability:** Allows through-hardening of substantial sections. * **Good Fatigue Strength:** Suitable for dynamically loaded parts. * **Considerations:** * **Toughness:** Requires careful tempering to maintain adequate toughness, as higher carbon can reduce impact resistance. * **Machinability:** Slightly lower than lower-carbon alloy steels in the annealed condition. * **Weldability:** Fair to poor; requires pre-heat and post-weld heat treatment due to high carbon equivalent. **Disclaimer:** The information provided is for general reference. Specific properties and performance depend on exact composition, manufacturing process, heat treatment parameters, and section size. Always consult certified material data sheets and qualified engineers for critical application specifications. -:- For detailed product information, please contact sales. -: AISI 4047 Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6191 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 4047 Steel Properties -:- For detailed product information, please contact sales. -:

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

Packing of AISI 4047 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 2662 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