AISI 1340 Steel Rod/Bar

AISI 1340 Steel Rod, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round Product Information -:- For detailed product information, please contact sales. -: AISI 1340 Steel Rod, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1340 Steel, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1340 Steel, Normalized at 870°C (1600°F), Air Cooled, 13 mm (0.5 in.) Round Bar** **Overview** AISI 1340 steel in the **normalized at 870°C (1600°F) and air cooled** condition is a thermally processed medium-carbon manganese alloy steel supplied as a precision round bar with a **13 mm (0.5 in.) diameter**. Normalization is a critical heat treatment that refines the grain structure, homogenizes the microstructure, and relieves internal stresses from prior rolling or forging. This specific treatment—heating to 870°C followed by controlled air cooling—optimizes the steel for a combination of good machinability, uniform mechanical properties, and dimensional stability. It serves as an excellent, ready-to-machine starting material for small-diameter precision components that may undergo further heat treatment or be used directly in applications requiring a balance of strength and toughness. **Key Features & Advantages** * **Refined & Uniform Microstructure:** Normalization eliminates coarse, non-uniform grains, resulting in a fine, homogeneous mixture of ferrite and pearlite. This enhances toughness, ductility, and consistency throughout the bar. * **Improved Machinability & Dimensional Stability:** The uniform, stress-relieved structure provides predictable chip formation during machining, reduces the risk of distortion, and ensures consistent part dimensions. * **Optimal Balance of Properties:** Offers a favorable combination of strength, hardness, and ductility—superior to the as-rolled state but more machinable than a quenched & tempered condition. * **Ideal Pre-Condition for Further Processing:** Creates a consistent, fine-grained starting condition ideal for subsequent through-hardening (quenching & tempering) or surface hardening processes, ensuring a uniform response. * **Precision Size for Detailed Work:** The 13 mm (0.5 in.) diameter is well-suited for small, intricate parts produced on screw machines, CNC lathes, or for use as precision shafts and pins. --- ### **1. Chemical Composition (Standard Conformance)** | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | 0.38 – 0.43 | Provides base strength and hardenability. Medium-carbon level ensures good machinability and hardening potential. | | **Manganese (Mn)** | 1.60 – 1.90 | **Key Alloying Element.** Significantly increases hardenability, strength, and contributes to the fine grain structure after normalization. | | **Phosphorus (P)** | ≤ 0.035 (max) | Residual, kept low for toughness. | | **Sulfur (S)** | ≤ 0.040 (max) | Residual, kept low. **Not a free-machining grade.** | | **Silicon (Si)** | 0.15 – 0.35 | Deoxidizer; strengthens ferrite. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G13400 * **AISI/SAE:** 1340 * **ASTM:** A29 (with normalization specified) * **DIN (Germany):** ~1.1167 / 38Mn6 (Close analogue) * **EN (Europe):** 1.1167 / 38Mn6 --- ### **2. Typical Physical & Mechanical Properties (Normalized at 870°C / 1600°F, Air Cooled, 13 mm dia.)** *Note: Properties are for the normalized condition. The small diameter ensures rapid, uniform air cooling.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.85 g/cm³ | | **Tensile Strength** | 650 – 800 MPa (94 – 116 ksi) | | **Yield Strength (0.2% Offset)** | 400 – 550 MPa (58 – 80 ksi) | | **Elongation (in 50mm)** | 18% – 24% | | **Reduction of Area** | 45% – 60% | | **Brinell Hardness (HB)** | 200 – 240 | | **Machinability (Comparison)** | Fair (~50-55% of AISI 1212). Good for an alloy steel in this condition. | | **Microstructure** | Fine, uniform lamellar pearlite in a ferrite matrix. | | **Surface Condition** | Typically descaled (shot blasted or pickled), with a uniform heat treatment oxide tint. | --- ### **3. Product Applications** This material is specified for small, high-quality components that require reliable properties and good machinability, often as a precursor to final hardening. * **Precision Shafts and Pins:** Small drive shafts, guide pins, dowel pins, and actuator rods for instruments, automotive systems, and machinery. * **Gear and Sprocket Blanks:** Blanks for small-to-medium precision gears and sprockets that will be machined and then case-hardened or through-hardened. * **Fasteners and Studs:** High-strength bolts, studs, and pins that may be machined and then heat-treated. * **Automotive Components:** Small transmission parts, valve train components, and linkage parts. * **General High-Quality Machine Parts:** Any component where the normalized condition provides the optimal combination of machinability, strength, and consistency for further processing or final use. --- ### **4. Heat Treatment Process & Considerations** * **Normalization Process:** The steel is uniformly heated to **870°C (1600°F)**, held to achieve complete austenitization and homogeneity, then **cooled in still air**. For a 13 mm bar, this provides a relatively fast and uniform cooling rate. * **Purpose:** Grain refinement, stress relief, homogenization, and improvement of toughness and ductility over the as-rolled state. * **Advantage for Small Diameters:** The 13 mm size ensures the entire cross-section cools at a similar rate, resulting in very uniform properties from surface to core. * **Comparison to Other Conditions:** * **vs. As-Rolled:** More uniform, refined microstructure; higher and more consistent strength/toughness; stress-relieved. * **vs. Annealed:** Higher strength and hardness; finer grain size; better toughness. * **vs. Quenched & Tempered:** Lower strength/hardness but vastly better machinability and no tempering required. Serves as a pre-hardened machining stock. * **Post-Treatment:** The oxide scale from heat treatment is typically removed. The bar is straight and ready for precision machining. -:- For detailed product information, please contact sales. -: AISI 1340 Steel, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round Specification Dimensions Size： Diameter 20-1000 mm Length <5023 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 1340 Steel, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1340 Steel Rod, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1340 Steel Rod, normalized at 870°C (1600°F), air cooled, 13 mm (0.5 in.) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1340 Steel Rod, normalized at 870°C (1600°F), air cooled, 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 Rod 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 1494 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