AISI 8620H Steel Foil/Strip

AISI 8620H Steel Foil, annealed 13 mm (0.5 in.) round Product Information -:- For detailed product information, please contact sales. -: AISI 8620H Steel Foil, annealed 13 mm (0.5 in.) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 8620H Steel, annealed 13 mm (0.5 in.) round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 8620H Steel, Annealed 13 mm (0.5 in.) Round Bar** #### **1. Overview** AISI 8620H is a **hardenability-controlled (H-grade)** variant of the standard AISI 8620 low-carbon nickel-chromium-molybdenum alloy steel. Supplied as an **annealed 13 mm (0.5 inch) diameter round bar**, this material represents a premium-grade raw stock engineered for **exceptional consistency in mass production**. The "H" designation guarantees that the steel's hardenability—its ability to form martensite to a certain depth upon quenching—falls within a specified, narrow range as defined by end-quench (Jominy) test data. In the annealed state, it offers **optimal machinability and formability**, providing manufacturers with a highly predictable material that will yield uniform core properties in finished, case-hardened components. #### **2. International Standards & Designations** AISI 8620H is defined by standards that specifically govern its hardenability, ensuring batch-to-batch consistency. | Region/System | Standard Designation | Title / Purpose | | :--- | :--- | :--- | | **USA (AISI/SAE)** | **AISI 8620H, SAE J404 & J1268** | Chemical Composition & Hardenability Bands | | **USA (ASTM)** | **ASTM A304** | Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements | | **UNS Number** | **H86200** | Unified Numbering System for H-Steels | | **Dimensional Standard** | **ASTM A29/A29M** | General Requirements for Steel Bars | | **Europe (EN)** | **1.6523H (20NiCrMo2-2H)** | Equivalent Material Designation (Hardenability-controlled) | | **Heat Treatment Ref.** | **SAE AMS-H-6875** | Heat Treatment of Steel, General Requirements | #### **3. Chemical Composition & Hardenability Guarantee** The chemical composition range for 8620H is similar to standard 8620 but is more tightly controlled to ensure the hardenability falls within the mandated "H-band." The key value is the predictable Jominy curve. **Core Composition (% by Weight, Typical AISI 8620H):** | Element | Content Range | Role in H-Steel | | :--- | :--- | :--- | | **Carbon (C)** | 0.17 - 0.23 | Provides base strength; content controlled to fine-tune hardenability. | | **Manganese (Mn)** | 0.60 - 0.95 | Major hardenability agent; range adjusted to hit H-band targets. | | **Phosphorus (P)** | ≤ 0.035 | Impurity control. | | **Sulfur (S)** | ≤ 0.040 | Impurity control. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer. | | **Nickel (Ni)** | 0.35 - 0.75 | Enhances core toughness and hardenability. | | **Chromium (Cr)** | 0.35 - 0.65 | Increases hardenability; range optimized for band control. | | **Molybdenum (Mo)** | 0.15 - 0.25 | Strong hardenability agent; refines grain. | **Guaranteed Hardenability (Key Feature):** The steel is purchased against a guaranteed range of hardness values at specific distances on the Jominy end-quench test bar. For 8620H, a typical hardness range at the standard Jominy positions (e.g., J6, J10, J20) is specified, ensuring that the **core hardness after carburizing and quenching will be predictable and consistent**, regardless of the production heat. #### **4. Mechanical & Physical Properties (Annealed Condition, 13 mm round)** The full anneal process provides a soft, uniform microstructure ideal for precision machining. **Typical As-Annealed Properties:** * **Hardness:** **149 - 179 HB** (Brinell) or **83 - 88 HRB** (Rockwell B). Consistent with standard 8620 for excellent machinability. * **Ultimate Tensile Strength (UTS):** **520 - 655 MPa** (75 - 95 ksi) * **Yield Strength (0.2% Offset):** **385 - 515 MPa** (56 - 75 ksi) * **Elongation in 2 inches:** **22% - 28%** * **Machinability Rating:** **~65%** (of B1112 steel). Offers excellent chip control and surface finish for a low-alloy steel. * **Microstructure:** Coarse pearlite and ferrite. **Physical Properties:** * **Density:** 7.85 g/cm³ (0.284 lb/in³) * **Modulus of Elasticity:** 205 GPa (29,700 ksi) * **Poisson's Ratio:** 0.29 * **Coefficient of Thermal Expansion:** 12.5 x 10⁻⁶/°C (20-100°C) #### **5. Product Applications** The 13 mm (0.5 in.) annealed 8620H round bar is specified for high-volume, precision components where **consistency in final heat-treated properties is non-negotiable**. * **High-Volume Automotive Components:** Transmission gears, pinions, camshafts, and fuel injection components where thousands of parts must have identical core hardness and case depth after processing. * **Precision Bearing Components:** Races and rollers for mass-produced bearings requiring uniform load-bearing capacity. * **Fasteners and Pins:** Critical dowel pins, bolts, and studs in engines and transmissions where consistent strength is vital for clamping force and fatigue life. * **Hydraulic and Pneumatic Parts:** Pump gears, valve spools, and piston rods produced in large batches. * **Consumer Appliances and Power Tools:** High-stress gearing and shafts where reliable performance is expected from every unit. #### **6. Key Characteristics & Advantages (as Annealed H-Grade Stock)** * **Unmatched Consistency in Final Properties:** The primary advantage. Guarantees that the core hardness after carburizing and quenching will be uniform from part-to-part and batch-to-batch, leading to predictable performance and fatigue life. * **Reduced Production Scrap and Rework:** Eliminates the risk of a whole heat of steel falling outside acceptable core hardness limits after heat treatment, a common risk with standard grades. * **Optimized for Automated, High-Volume Machining:** The consistent annealed hardness ensures predictable tool wear, chip formation, and cycle times in CNC machining centers, maximizing production efficiency. * **Superior Quality for Critical Designs:** Enables engineers to design to tighter safety margins, knowing the material's response to heat treatment is guaranteed. * **Simplified Heat Treatment Process Control:** With hardenability variation minimized, heat treaters can use more consistent time-temperature parameters, improving overall process capability (Cpk). **Conclusion:** **AISI 8620H in the annealed 13 mm round bar form is the choice of discerning manufacturers for high-volume, critical component production.** It transcends being merely a raw material to become a **reliability and consistency engineering solution**. While chemically similar to standard 8620, the "H" designation and its guaranteed hardenability band provide an essential layer of quality assurance, **dramatically reducing variability in the final hardened product**. For applications in the automotive, bearing, and other high-volume precision industries, the use of 8620H is a strategic investment that pays dividends in reduced scrap, fewer processing issues, and ultimately, more reliable end products. The 0.5-inch diameter is perfectly suited for automated machining of a vast array of small, high-precision parts that form the backbone of modern mechanical systems. -:- For detailed product information, please contact sales. -: AISI 8620H Steel, annealed 13 mm (0.5 in.) round Specification Dimensions Size： Diameter 20-1000 mm Length <5724 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 8620H Steel, annealed 13 mm (0.5 in.) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 8620H Steel Foil, annealed 13 mm (0.5 in.) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 8620H Steel Foil, annealed 13 mm (0.5 in.) round -:- For detailed product information, please contact sales. -:

Packing of AISI 8620H Steel Foil/Strip, annealed 13 mm (0.5 in.) round -:- 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 2195 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