AISI 1050 Steel, as cold drawn bar

AISI 1050 Steel, as cold drawn bar, 16-22 mm (0.625-0.875 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1050 Steel, as cold drawn bar, 16-22 mm (0.625-0.875 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1050 Steel, as cold drawn bar, 16-22 mm (0.625-0.875 in) round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1050 Steel, Cold Drawn Bar, 16-22 mm (0.625-0.875 in) Round** **Overview** AISI 1050 steel, supplied as a cold drawn round bar in the 16-22 mm (0.625-0.875 in) diameter range, represents a precision-engineered, high-strength material. This specific manufacturing process transforms hot-rolled stock into a product with superior dimensional accuracy, excellent surface finish, and significantly enhanced mechanical properties through strain hardening. It is designed as a premium "ready-to-machine" raw material for the manufacture of critical components that demand a combination of high strength, geometric precision, and reliable performance, often serving as an ideal pre-form for subsequent heat treatment. --- #### **1. Chemical Composition (Nominal, Weight %)** The composition is tightly controlled to meet AISI/SAE 1050 specifications, ensuring consistent material behavior and predictable response to further processing or heat treatment. | Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) max | Sulfur (S) max | Silicon (Si) | Iron (Fe) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Content (%)** | 0.48 - 0.55 | 0.60 - 0.90 | 0.040 | 0.050 | 0.15 - 0.35 | Balance | * **Primary Role of Elements:** * **Carbon (0.48-0.55%):** The primary strengthening element. This higher carbon content provides greater inherent strength, improved hardenability, and better wear resistance in both the as-drawn state and after heat treatment compared to lower-carbon grades. * **Manganese (0.60-0.90%):** Enhances the response to cold work, contributing to the higher attainable yield strength after drawing. It also improves hardenability for subsequent quenching operations. * **Silicon (0.15-0.35%):** Acts as a deoxidizer (silicon-killed steel), ensuring a clean and uniform microstructure that is essential for the integrity of the cold drawing process. --- #### **2. Physical & Mechanical Properties (Typical, As-Cold Drawn & Stress-Relieved)** *Note: Properties are for the as-drawn and typically stress-relieved condition, offering an optimal balance of high strength and good machinability for this grade.* * **Hardness:** **~190-230 HB** (Approximately 90-98 HRB). The cold work significantly increases the hardness over the hot-rolled condition. * **Tensile Strength (Ultimate):** 650 - 800 MPa (94 - 116 ksi) * **Yield Strength (0.2% Offset):** **515 - 690 MPa (75 - 100 ksi) min.** This marked increase in yield strength is a key advantage for load-bearing precision parts. * **Elongation (in 50mm / 2in):** 10% - 15% * **Modulus of Elasticity:** ~200 GPa (29 x 10⁶ psi) * **Surface Finish:** Smooth, bright, and virtually scale-free, with excellent surface integrity and minimal decarburization. Typical surface roughness (Ra) is superior to hot-rolled material. * **Dimensional Tolerance:** Held to tight cold-drawn tolerances (e.g., ASTM A108). The 16-22 mm range allows for exceptional diameter consistency and straightness. * **Machinability:** **~55-60%** (Compared to 100% for AISI 1212). While strong and hard, the stress-relieved condition provides predictable and stable machining characteristics with proper tooling and parameters, yielding a good surface finish on machined parts. --- #### **3. Manufacturing Process & Typical Condition** The production involves precise control: 1. **Preparation:** Hot-rolled AISI 1050 bar is cleaned (pickled) to remove mill scale. 2. **Cold Drawing:** The bar is drawn at room temperature through a tungsten carbide die. This process reduces the cross-section, aligns the grain structure longitudinally, and induces significant **strain hardening**. 3. **Stress Relieving:** A standard low-temperature thermal treatment (~300-400°C / 570-750°F) follows to relieve internal stresses. This stabilizes the dimensions, minimizes machining distortion, and improves machinability. * **Final Condition:** Commonly supplied as **Cold Drawn and Stress Relieved (CD-SR)**. --- #### **4. Product Applications** This precision AISI 1050 cold drawn bar is specified for applications where high strength, tight tolerances, and a superior surface are required. * **High-Stress Precision Shafts:** Hydraulic piston rods, pump shafts, motor spindles, and precision guide pins in automation and machinery. * **Automotive & Aerospace Components:** Critical axles, pins, studs, and actuator parts that benefit from high yield strength and dimensional accuracy. * **Fasteners:** Blanks for high-strength bolts, dowel pins, and shoulder bolts (often machined and then heat-treated to Grade 8.8 or higher specifications). * **Tooling & Machinery:** Guide rods, ejector pins, bushings, and wear-resistant liners for molds and fixtures. * **Gear and Sprocket Blanks:** Excellent raw material for machining gear blanks prior to carburizing or induction hardening, as precise dimensions reduce machining time and cost. * **Bearing and Bushing Components:** For applications where the high carbon content is suitable for through-hardening after machining. --- #### **5. Relevant International Standards** This product conforms to international standards for cold-finished carbon steel bars. * **ASTM (USA):** * **ASTM A108:** Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished. This is the primary governing standard for tolerances and quality. * ASTM A29: General requirements for steel bars. * **SAE (USA - Automotive):** **SAE J403, J412** (Grade 1050). * **UNS (Unified Numbering System):** **G10500** * **ISO (International):** * **ISO 683-18:** Heat-treatable steels, alloy steels and free-cutting steels – Part 18: Bright products of alloy steels. * **DIN (Germany):** **DIN EN 10083-2:** Steels for quenching and tempering (Corresponds to **C50E** or **1.1206**). * **JIS (Japan):** JIS G4051: Carbon steels for machine structural use (S50C). * **BS (UK):** BS 970-1: (Grade 060A52). --- #### **6. Key Advantages & Considerations** * **Advantages:** * **High As-Delivered Strength:** Provides exceptional yield and tensile strength without the need for initial heat treatment. * **Superior Dimensional Precision:** Excellent diameter tolerances and straightness enable direct use in automated CNC machining, reducing setup time and material waste. * **Enhanced Surface Quality:** The bright finish minimizes pre-machining preparation and can improve the final part's surface finish and aesthetics. * **Excellent Hardenability:** The higher carbon content makes it highly responsive to through-hardening and surface hardening processes, offering great flexibility for final part properties. * **Considerations:** * **Lower Machinability than Annealed Grades:** Requires more robust tooling, appropriate cutting speeds/feeds, and good cooling compared to annealed 1050. * **Poor Weldability:** The high carbon content and cold-worked state create a high risk of cracking in the heat-affected zone. Welding is generally not recommended. * **Anisotropic Properties:** Mechanical properties, especially ductility and impact resistance, are directional (higher parallel to the drawing direction). * **Limited Formability:** Not suitable for secondary cold bending or forming operations in the as-drawn condition. **In summary, AISI 1050 cold drawn round bar (16-22 mm) is a high-performance material chosen for applications demanding a superior blend of strength, precision, and surface quality. It is a cost-effective solution for manufacturing robust, high-tolerance components that may be used directly in the as-machined state or serve as premium blanks for final heat treatment.** -:- For detailed product information, please contact sales. -: AISI 1050 Steel, as cold drawn bar, 16-22 mm (0.625-0.875 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <6107 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 1050 Steel, as cold drawn bar, 16-22 mm (0.625-0.875 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1050 Steel, as cold drawn bar, 16-22 mm (0.625-0.875 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1050 Steel, as cold drawn bar, 16-22 mm (0.625-0.875 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1050 Steel, as cold drawn bar, 16-22 mm (0.625-0.875 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 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 2578 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