AISI 1118 Steel, cold drawn

AISI 1118 Steel, cold drawn, low temperature, stress relieved, round Product Information -:- For detailed product information, please contact sales. -: AISI 1118 Steel, cold drawn, low temperature, stress relieved, round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1118 Steel, cold drawn, low temperature, stress relieved, round Product Information -:- For detailed product information, please contact sales. -: ## **Product Data Sheet: AISI 1118 Steel, Cold Drawn, Low-Temperature Stress Relieved, Round Bar** --- ### **1. Product Overview** **AISI 1118 Steel, Cold Drawn and Low-Temperature Stress Relieved**, represents a precision-engineered material condition optimized for high-stability machining and subsequent heat treatment. This product undergoes a two-stage manufacturing process: first, cold drawing to achieve enhanced strength and tight dimensional tolerances; second, a controlled low-temperature thermal treatment (typically 260-400°C / 500-750°F) specifically designed to relieve internal stresses induced during cold working without significantly altering the microstructure or mechanical properties. This condition is specifically engineered for components where **dimensional stability during machining and minimal distortion during subsequent hardening processes are critical**. It bridges the gap between the high strength of cold drawn material and the stability requirements of precision manufacturing. **Key Advantages of Stress-Relieved Cold Drawn AISI 1118:** * **Superior Dimensional Stability:** Significantly reduces residual stresses, minimizing part movement, warping, or distortion during machining, grinding, or in-service loading. * **Optimized for Precision Manufacturing:** Provides the tight tolerances and excellent surface finish of cold drawn stock while eliminating the "spring-back" and dimensional drift associated with stressed material. * **Improved Machining Consistency:** Ensures uniform cutting forces and predictable tool wear across the entire bar length, resulting in better part consistency and higher production yields. * **Enhanced Heat Treatment Response:** Creates an ideal pre-condition for case hardening or through-hardening, as the reduced stress state minimizes distortion during high-temperature thermal cycles. --- ### **2. Chemical Composition (Standard % by Weight)** The composition adheres to the standard AISI 1118 specification, characterized by its higher manganese content for hardenability. | Element | Content (%) | Function & Implication | | :--- | :--- | :--- | | **Carbon (C)** | 0.14 - 0.20 | Provides base strength and is essential for response to hardening treatments. | | **Manganese (Mn)** | 1.30 - 1.60 | **Critical for Hardenability.** Enhances through-hardening capability while providing solid solution strengthening. | | **Phosphorus (P)** | ≤ 0.040 | Residual element, controlled to maintain toughness. | | **Sulfur (S)** | ≤ 0.050 | **Kept Low.** Improves weldability and transverse ductility compared to free-machining grades. | | **Iron (Fe)** | Balance | Base metal. | --- ### **3. Typical Physical & Mechanical Properties (Cold Drawn & Stress Relieved)** *The low-temperature stress relief process slightly reduces strength while significantly improving dimensional stability. Properties remain higher than hot-rolled material.* | Property | Typical Value (Metric) | Typical Value (Imperial) | Notes | | :--- | :--- | :--- | :--- | | **Tensile Strength** | 480 - 580 MPa | 70,000 - 84,000 psi | Slightly reduced from as-drawn state. | | **Yield Strength (0.2% Offset)** | 400 - 500 MPa | 58,000 - 72,500 psi | Maintains high yield strength. | | **Elongation (in 50 mm)** | 15% - 22% | 15% - 22% | Improved ductility over as-drawn. | | **Hardness** | 149 - 192 HB | 149 - 192 HB | Consistent, uniform hardness. | | **Key Characteristic** | **Low Residual Stress (< 100 MPa typical)** | **Low Residual Stress** | Primary benefit for precision work. | | **Machinability** | **Good & Consistent** | | Predictable chip formation with reduced vibration. | --- ### **4. International Standards & Specifications** This is a specially processed condition based on standard cold-drawn specifications with an additional thermal treatment. | Standard System | Grade Designation | Applicable Base Specification | Process Condition | | :--- | :--- | :--- | :--- | | **ASTM (USA)** | 1118 | ASTM A108 | Supplied with **Stress Relieved (SR)** supplementary requirement. | | **SAE (USA)** | SAE 1118 | SAE J403 | - | | **UNS (USA)** | G11180 | - | - | | **DIN (Germany)** | 1.0725 | DIN EN 10277 | Can be supplied to "**+SR**" (Stress Relieved) condition. | | **Common Spec.** | **Cold Drawn, Stress Relieved (CD-SR)** | Customer-specific (e.g., "SR per AMS 2759/2") | Often specified on engineering drawings for critical parts. | --- ### **5. Primary Applications** This material is specified for precision components where dimensional stability is paramount, particularly those requiring subsequent heat treatment. * **Precision Gearing Components:** Gear blanks, splined shafts, and pinions that will be carburized or induction hardened, where tooth geometry must be maintained. * **Hydraulic & Pneumatic Valves:** Spools, sleeves, and valve bodies requiring tight tolerances and minimal distortion after machining and hardening. * **Automotive Transmission Parts:** Synchronizer hubs, shift forks, and bearing races where dimensional stability ensures proper assembly and function. * **Precision Shafting & Axles:** Critical shafts requiring straightness and stability for high-speed rotation or precise alignment. * **Tooling & Fixture Components:** Jigs, fixtures, and gauge elements that must maintain dimensional accuracy over time and under load. --- ### **6. Processing & Fabrication Notes** * **Heat Treatment (Post-Machining):** **Excellent candidate for case hardening (carburizing, carbonitriding) and through-hardening (quench & temper).** The stress-relieved state provides the most stable platform, minimizing distortion during high-temperature cycles and quenching. * **Machining:** **Superior to standard cold drawn.** The stress-relieved structure allows for stable, predictable machining with excellent surface finishes. Complex parts with thin walls or asymmetric designs benefit significantly from this condition. * **Grinding & Finishing:** Responds exceptionally well to grinding operations due to uniform hardness and low stress state, reducing the risk of grinding cracks or distortion. * **Weldability:** **Good** for a low-carbon steel. However, welding will introduce new localized stresses and alter the microstructure. If welding is necessary, post-weld stress relief is recommended. * **Stability:** The primary benefit. Machined components will maintain their shape and dimensions with minimal time-dependent movement, crucial for assemblies with precision fits. --- **Disclaimer:** The information provided is for technical reference. The specific parameters of the stress relief cycle can affect final properties. For mission-critical applications, validation through first-article testing and consultation with the material supplier is essential. Always review full material certifications and Safety Data Sheets (SDS) prior to use. -:- For detailed product information, please contact sales. -: AISI 1118 Steel, cold drawn, low temperature, stress relieved, round Specification Dimensions Size： Diameter 20-1000 mm Length <4944 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, cold drawn, low temperature, stress relieved, round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1118 Steel, cold drawn, low temperature, stress relieved, round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1118 Steel, cold drawn, low temperature, stress relieved, round -:- For detailed product information, please contact sales. -:

Packing of AISI 1118 Steel, cold drawn, low temperature, stress relieved, 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 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 1415 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