AISI 12L14 Steel, hot rolled

AISI 12L14 Steel, hot rolled, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: AISI 12L14 Steel, hot rolled, 19-38 mm round Synonyms -:- For detailed product information, please contact sales. -:

AISI 12L14 Steel, hot rolled, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 12L14 Steel, Hot Rolled Round Bar (19-38 mm)** **Overview** AISI 12L14 is a globally recognized, low-carbon, **leaded and resulfurized** free-machining steel supplied as a **hot rolled round bar** in the diameter range of **19-38 mm**. This grade is renowned for providing the **optimal balance of machinability, surface finish, and cost-effectiveness** among free-cutting steels. The addition of lead significantly improves chip-breaking characteristics and reduces cutting forces, while the specific composition ensures consistent performance. Supplied in the economical as-rolled condition, 12L14 is the industry's premier choice for high-volume production of complex parts on automatic screw machines, offering superior productivity and surface quality for non-structural applications. **Key Features & Advantages** * **Superior Machinability:** The lead content (0.15-0.35%) acts as an internal lubricant, enabling faster cutting speeds, longer tool life, and improved chip control compared to non-leaded grades. Its machinability rating is exceptionally high, typically around 160-180% of the AISI 1212 standard. * **Excellent Surface Finish:** Produces superior surface quality on machined components, often reducing or eliminating the need for secondary finishing operations such as grinding or polishing. * **Cost-Effective Production:** The combination of reduced machining time, extended tool life, and minimal finishing requirements delivers significant overall cost savings in high-volume manufacturing. * **Consistent Performance:** Provides predictable and stable machining behavior, which is critical for automated production processes and maintaining tight tolerances. * **Good Chip Formation:** The balanced chemistry promotes the formation of small, easily managed chips, preventing bird nesting and machine downtime. --- ### **1. Chemical Composition (Standard Conformance)** | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | ≤ 0.15 (max) | Kept low to maximize machinability and prevent work hardening during machining. | | **Manganese (Mn)** | 0.85 – 1.15 | Higher manganese range than 12L13; combines with sulfur for effective chip breaking. | | **Phosphorus (P)** | 0.04 – 0.09 | Improves machinability and chip formation. | | **Sulfur (S)** | 0.26 – 0.35 | **Elevated.** Primary chip-breaking agent through manganese sulfide formation. | | **Lead (Pb)** | **0.15 – 0.35** | **Key performance element.** Provides internal lubrication at the tool-chip interface. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G12144 * **AISI/SAE:** 12L14 * **ASTM:** A29 (Specification for Steel Bars, Carbon and Alloy, Hot-Wrought) * **DIN (Germany):** 10SPb20 / 1.0711 * **EN (Europe):** 1.0711 * **JIS (Japan):** SUM24L --- ### **2. Typical Physical & Mechanical Properties (Hot Rolled, As-Rolled Condition)** *Note: This material is selected for machining performance, not mechanical strength.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | ~7.87 g/cm³ (Slightly elevated due to lead content) | | **Machinability Rating** | **~160-180%** (Relative to AISI 1212=100%) | | **Tensile Strength** | 400 – 500 MPa (58 – 73 ksi) | | **Yield Strength (0.2% Offset)** | 300 – 380 MPa (44 – 55 ksi) | | **Elongation (in 50mm)** | 15% – 25% *(Highly anisotropic)* | | **Brinell Hardness (HB)** | 135 – 175 | | **Surface Condition** | Standard hot-rolled mill scale surface. | --- ### **3. Product Applications** AISI 12L14 hot rolled rounds are extensively used in high-volume precision machining applications across multiple industries: * **Screw Machine Products:** Complex fittings, connectors, bushings, and small precision components for automotive, hydraulic, and pneumatic systems. * **Fasteners:** Nuts, bolts, set screws, and specialized fasteners produced at high speeds. * **Electrical Components:** Connector pins, terminals, and switch parts requiring excellent surface finish. * **Automotive Non-Structural Parts:** Fuel system components, sensor housings, and decorative trim. * **Consumer Goods:** Appliance parts, hardware components, and decorative fittings. --- ### **4. Critical Considerations & Limitations** * **Health and Safety Regulations:** **Contains lead (Pb).** Requires proper handling procedures including local exhaust ventilation during machining and appropriate PPE. Swarf disposal must comply with environmental regulations for lead-containing materials. * **Non-Weldable:** **NOT SUITABLE FOR WELDING.** The lead, sulfur, and phosphorus content causes severe embrittlement and hot cracking. * **Poor Mechanical Properties:** Exhibits low strength and very poor transverse ductility. **Not suitable for structural, load-bearing, or safety-critical applications.** * **Thermal Limitations:** Cannot be heat-treated for strengthening. Elevated temperatures may cause lead to sweat out of the material. * **Regulatory Restrictions:** Use may be restricted or prohibited in applications involving food contact, potable water systems, or children's products. * **Comparison to 12L13:** 12L14 has slightly higher manganese and sulfur ranges, providing more consistent machinability across different production batches. It is generally considered the superior and more widely used leaded free-machining grade. **Disclaimer:** AISI 12L14 is a specialized machining steel designed for maximum production efficiency. Its use requires strict adherence to safety protocols for lead handling and compliance with environmental regulations. This material should not be used in welded assemblies, heat-treated components, or applications requiring significant mechanical strength. Proper risk assessment and safety measures must be implemented before use. -:- For detailed product information, please contact sales. -: AISI 12L14 Steel, hot rolled, 19-38 mm round Specification Dimensions Size： Diameter 20-1000 mm Length <5013 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 12L14 Steel, hot rolled, 19-38 mm round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 12L14 Steel, hot rolled, 19-38 mm round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 12L14 Steel, hot rolled, 19-38 mm round -:- For detailed product information, please contact sales. -:

Packing of AISI 12L14 Steel, hot rolled, 19-38 mm 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 1484 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