AISI 1118 Steel Wire,

AISI 1118 Steel Wire, annealed at 790°C (1450°F) Product Information -:- For detailed product information, please contact sales. -: AISI 1118 Steel Wire, annealed at 790°C (1450°F) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1118 Steel, annealed at 790°C (1450°F) Product Information -:- For detailed product information, please contact sales. -: ## **Product Data Sheet: AISI 1118 Steel, Annealed at 790°C (1450°F)** --- ### **1. Product Overview** **AISI 1118, Annealed at 790°C (1450°F)**, is a specific thermally softened condition of this low-carbon, direct-hardening steel. Annealing involves heating the steel to a temperature above its recrystallization point but typically below the lower critical temperature (A1), holding for a sufficient duration, and then cooling slowly (often in the furnace). This 790°C (1450°F) treatment is a **subcritical or process annealing**, designed primarily to **relieve internal stresses, restore ductility, and soften the material** without causing a full phase transformation to austenite. The result is a highly machinable and formable state with a spheroidized or highly softened ferrite-carbide structure. This processing route is specified to maximize **cold workability and machinability** for complex forming operations or heavy machining prior to a final hardening process. It is the softest and most ductile condition in which AISI 1118 is commonly supplied, trading off strength for maximum workability. **Key Advantages of Annealed AISI 1118:** * **Maximum Softness & Ductility:** Achieves the lowest possible hardness and highest elongation, making it ideal for severe cold forming, bending, and drawing operations without risk of cracking. * **Optimized Machinability:** The softened, spheroidized structure allows for easier chip formation, reduced cutting forces, extended tool life, and the ability to achieve good surface finishes, especially in complex machining operations. * **Complete Stress Relief:** Effectively eliminates nearly all internal stresses from prior cold working, hot rolling, or machining, providing a dimensionally stable and predictable material for subsequent precision manufacturing steps. * **Uniform Microstructure:** Produces a homogeneous distribution of fine carbides in a ferrite matrix, ensuring consistent mechanical behavior throughout the workpiece. --- ### **2. Chemical Composition (Standard % by Weight)** The composition remains the standard AISI 1118 specification, with its characteristic higher manganese content. | Element | Content (%) | Function & Implication in Annealing | | :--- | :--- | :--- | | **Carbon (C)** | 0.14 - 0.20 | Forms fine cementite (Fe3C) carbides that spheroidize during the anneal, contributing to softness. | | **Manganese (Mn)** | 1.30 - 1.60 | In solid solution, it provides solid solution strengthening. During this subcritical anneal, it slows carbide coalescence, aiding in forming a fine, uniform spheroidized structure. | | **Phosphorus (P)** | ≤ 0.040 | Residual, kept low to prevent cold shortness (embrittlement). | | **Sulfur (S)** | ≤ 0.050 | **Kept Low.** Ensures good ductility and toughness in the annealed state, and is crucial for weldability. | | **Iron (Fe)** | Balance | Base metal. | --- ### **3. Typical Physical & Mechanical Properties (Annealed at 790°C / 1450°F)** *Properties reflect the maximally softened state. Cooling rate (furnace cool vs. controlled cool) significantly influences final hardness.* | Property | Typical Value (Metric) | Typical Value (Imperial) | Notes | | :--- | :--- | :--- | :--- | | **Tensile Strength** | 380 - 450 MPa | 55,000 - 65,000 psi | Minimum strength condition. | | **Yield Strength (0.2% Offset)** | 275 - 345 MPa | 40,000 - 50,000 psi | Very low yield point, easy to deform. | | **Elongation (in 50 mm)** | 30% - 40% | 30% - 40% | Maximum ductility. | | **Reduction of Area** | 60% - 75% | 60% - 75% | Excellent formability indicator. | | **Hardness** | 121 - 149 HB | 121 - 149 HB | Softest standard condition for this grade. | | **Microstructure** | **Ferrite matrix with fine, spheroidized carbides.** | | Ideal for cold work and machining. | | **Machinability** | **Very Good** (for a non-free-machining steel) | | Softer structure allows for easier cutting; chips may be stringy. | --- ### **4. International Standards & Specifications** Annealing is a standard thermal processing condition applied to material conforming to base specifications. | Standard System | Grade Designation | Applicable Base Specification | Heat Treatment Note | | :--- | :--- | :--- | :--- | | **ASTM / AISI (USA)** | AISI 1118 | ASTM A29 / ASTM A108 | Can be supplied annealed per ASTM A29 or as a special requirement (often "Softened" or "Annealed"). | | **SAE (USA)** | SAE 1118 | SAE J403 | - | | **UNS (USA)** | G11180 | - | - | | **DIN (Germany)** | 1.0725 | DIN 17222 / EN 10263-3 | Can be supplied to "**+A**" condition (Annealed) or "**+SR**" (Softened). | | **EN (Europe)** | 1.0725 | EN 10263-3 | - | | **Common Callout** | **Annealed 790°C (1450°F), Furnace Cool** | | Specified for maximum formability. | --- ### **5. Primary Applications** This annealed condition is selected for components that require extensive cold deformation or heavy machining before a final heat treatment. * **Cold Heading & Extrusion:** Primary feedstock for manufacturing bolts, nuts, rivets, and complex cold-formed parts where maximum ductility is required to prevent cracking during high-strain forming. * **Cold Drawing & Wire:** Used as a starting material for producing cold-drawn wire, rods, and special profiles where the annealed state allows for significant reduction in cross-sectional area. * **Complex Machined Parts:** Components with intricate geometries or deep cavities that require removal of large amounts of material; the annealed state reduces power consumption and tool wear during machining. * **Pre-Forms for Heat Treatment:** Blanks that are first machined or formed in this soft condition and then subsequently quenched & tempered or case hardened to achieve final properties. * **General Fabrication Parts:** Brackets, spacers, and non-critical components that may be bent or formed and where the annealed softness is sufficient for the application. --- ### **6. Processing & Fabrication Notes** * **Subsequent Heat Treatment:** **Essential for most functional applications.** This annealed state is a precursor. Parts are typically **quenched & tempered** or **case hardened** after forming/machining to develop required strength and wear resistance. The uniform, soft structure allows for predictable transformation during hardening. * **Machinability:** **Very Good for its class.** Produces a smooth finish but tends to form long, continuous chips. Use sharp tools with polished rake faces and effective chip breakers. Cutting speeds can be higher than for normalized or as-rolled states. * **Cold Working:** **Excellent.** This is the primary reason for this treatment. It can withstand severe bending, stamping, drawing, and rolling operations with minimal risk of fracture. * **Weldability:** **Good.** The low carbon and sulfur content make it readily weldable using common methods. However, welding will locally destroy the annealed microstructure, creating a hard heat-affected zone (HAZ) that may require post-weld heat treatment if forming is needed afterward. * **Strain Hardening:** Significant cold work will rapidly increase its strength and hardness (work hardening), reducing further ductility. Intermediate annealing may be required for multi-stage forming operations. --- **Disclaimer:** The information provided is for general reference. The exact annealing cycle (temperature, time, cooling rate) can be tailored to achieve specific hardness ranges. For critical forming operations, consultation with the material supplier and heat treater is recommended. Always review full material certifications and Safety Data Sheets (SDS) prior to use. -:- For detailed product information, please contact sales. -: AISI 1118 Steel, annealed at 790°C (1450°F) Specification Dimensions Size： Diameter 20-1000 mm Length <4942 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 1118 Steel, annealed at 790°C (1450°F) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1118 Steel Wire, annealed at 790°C (1450°F) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1118 Steel Wire, annealed at 790°C (1450°F) -:- For detailed product information, please contact sales. -:

Packing of AISI 1118 Steel Wire, annealed at 790°C (1450°F) -:- 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 Wire 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 1413 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