AISI 1547 Steel, annealed, cold drawn

AISI 1547 Steel, annealed, cold drawn, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1547 Steel, annealed, cold drawn, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1547 Steel, annealed, cold drawn, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1547 Steel, Annealed & Cold Drawn Round Bar (19-32 mm / 0.75-1.25 in)** **Overview** AISI 1547 steel in the **annealed and cold drawn** condition is a premium-processed, high-manganese alloy steel supplied as round bars in the **19-32 mm (0.75-1.25 in)** diameter range. This specialized two-step thermomechanical treatment involves first annealing the steel to achieve a soft, ductile, and stress-free microstructure, followed by a controlled cold drawing operation. This sequence is specifically engineered to optimize the material for **complex machining operations** while retaining the enhanced dimensional precision and surface quality of cold finishing. It provides an ideal balance between exceptional machinability, dimensional stability, and a moderate increase in strength, serving as the perfect starting stock for intricate components that will undergo final high-strength heat treatment. **Key Features & Advantages** * **Optimized Machinability:** The annealing process produces the softest possible condition for this high-carbon, high-manganese steel, dramatically reducing cutting forces, extending tool life, and enabling high-speed machining of complex geometries with superior surface finish. * **Precision Dimensional Control:** The subsequent cold drawing imparts excellent diameter tolerances (ASTM A108), superior straightness, and a bright, smooth surface finish, ensuring reliable performance in automated feeders and precise final part dimensions. * **Enhanced Dimensional Stability:** The combination of complete stress relief from annealing and the uniform, light cold work provides exceptional stability during machining, minimizing the risk of part warping or distortion, which is critical for intricate components. * **Improved Strength over Annealed-Only Material:** While prioritizing machinability, the final drawing step provides a controlled increase in yield and tensile strength compared to purely annealed stock, offering a more robust and stable machining blank. * **Ideal Pre-Condition for Final Hardening:** Creates a uniform, stress-free, and easily machinable blank that is perfectly prepared for subsequent through-hardening (quenching & tempering), ensuring minimal and predictable distortion during the final heat treatment. --- ### **1. Chemical Composition (Standard Conformance)** | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | 0.43 – 0.51 | Provides fundamental hardenability and strength potential. In the annealed state, carbon exists as soft spheroidized carbides. | | **Manganese (Mn)** | 1.35 – 1.65 | **Primary Alloying Element.** Provides deep hardenability potential and contributes to a uniform, fine-grained annealed structure. | | **Phosphorus (P)** | ≤ 0.040 (max) | Residual element, kept low for good toughness. | | **Sulfur (S)** | ≤ 0.050 (max) | Residual element, kept low. **Not a free-machining steel.** | | **Silicon (Si)** | 0.15 – 0.35 | Deoxidizer; strengthens ferrite. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G15470 * **AISI/SAE:** 1547 * **ASTM:** **A108** (Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished – Annealed and Cold Drawn is a specified condition) * **DIN (Germany):** No direct equivalent; similar to an annealed and drawn 1.1213 (C55) with high Mn. * **EN (Europe):** No direct equivalent. --- ### **2. Typical Physical & Mechanical Properties (Annealed & Cold Drawn Condition, 19-32 mm)** *Note: Properties reflect a fully softened state with minor strengthening from the final light drawing pass.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Tensile Strength** | 600 – 750 MPa (87 – 109 ksi) | | **Yield Strength (0.2% Offset)** | 380 – 520 MPa (55 – 75 ksi) | | **Elongation (in 50mm)** | 18% – 25% | | **Brinell Hardness (HB)** | 180 – 220 | | **Machinability (Comparison)** | **Good (~60-65% of AISI 1212).** Excellent for a high-carbon alloy steel, enabling efficient production of complex parts. | | **Surface Roughness (Ra)** | 1.6 – 3.2 μm (63 – 125 μin). Bright, smooth commercial finish. | | **Tolerances** | Meets ASTM A108 cold-drawn tolerances. | | **Microstructure** | Spheroidized cementite in a ferrite matrix (fully annealed), with minimal strain from the light final draw. | --- ### **3. Product Applications** This material is specifically designed for the manufacture of complex, high-precision components that require extensive machining prior to achieving final ultra-high strength through heat treatment. * **Complex High-Strength Gear Blanks:** Intricate gear profiles, splined shafts, and pinions requiring extensive hobbing or shaping before carburizing or through-hardening. * **Precision Forging Blanks for Cold/Warm Forging:** Uniform, soft stock for forming complex near-net shapes that will later be heat treated. * **Intricate Automotive & Aerospace Components:** Complex transmission parts, actuator components, and landing gear parts with thin walls and deep cavities. * **Tooling & Die Components for Stamping/Molding:** Inserts, cores, and ejector pins requiring extensive machining to precise tolerances before final hardening. * **High-Strength Fasteners (Pre-Thread Rolling):** Ideal stock for thread rolling, cold heading, or other severe forming operations due to its high ductility and uniform structure. * **General High-Precision, Pre-Hardened Parts:** Any component where minimizing machining cost, time, and distortion risk is critical, and final ultra-high strength (HRC 45-55+) will be imparted via a separate quench & temper cycle. --- ### **4. Process Rationale & Critical Considerations** * **Process Sequence Rationale:** 1. **Full Anneal:** Heated to ~790-815°C (1450-1500°F) and slowly furnace-cooled to achieve a soft, spheroidized microstructure for optimal machinability and stress relief. 2. **Light Cold Draw:** Primarily to improve dimensional accuracy, straightness, and surface finish. The strength increase is a secondary benefit; the draw is not intended for significant strain hardening. * **Key Distinction from Other Conditions:** * **vs. Standard Cold Drawn (CD):** Prioritizes **machinability and stability** over immediate high strength. Standard CD 1547 is much harder and more difficult to machine. * **vs. Hot Rolled & Annealed:** Superior surface finish, tighter tolerances, and better straightness. * **vs. Normalized:** Softer, more machinable, and more dimensionally stable. * **Stress State:** The anneal provides complete stress relief. The subsequent light drawing introduces minimal new residual stress, making this an exceptionally stable material for precision machining. * **Mandatory Subsequent Heat Treatment:** This material condition is **not for final high-strength service**. Its sole purpose is to be **machined to final dimensions** in its soft, stable state. The components must then undergo **quenching & tempering** to develop their ultra-high strength and wear resistance properties. This sequence is chosen to **minimize quenching distortion** on complex parts. * **Cost-Benefit Analysis:** This two-step process commands a premium price. The justification lies in the **total manufactured cost savings** for complex parts: reduced machining time, longer tool life, lower scrap rates from distortion, and more predictable final heat treatment outcomes. --- **Disclaimer:** **AISI 1547 Annealed and Cold Drawn is a specialized pre-machining/pre-hardening material.** Its excellent properties are for manufacturing efficiency and dimensional stability, **not** for final high-strength service without subsequent hardening heat treatment. Selection must be based on a comprehensive analysis of total part cost, including machining, heat treatment, and scrap management. Final part design must account for the dimensional changes that will occur during the final quench & temper process. Always refer to the certified mill test report for actual properties. -:- For detailed product information, please contact sales. -: AISI 1547 Steel, annealed, cold drawn, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <5045 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 1547 Steel, annealed, cold drawn, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1547 Steel, annealed, cold drawn, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1547 Steel, annealed, cold drawn, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1547 Steel, annealed, cold drawn, 19-32 mm (0.75-1.25 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 1516 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