AISI 12L15 Steel, hot rolled

AISI 12L15 Steel, hot rolled, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: AISI 12L15 Steel, hot rolled, 19-38 mm round Synonyms -:- For detailed product information, please contact sales. -:

AISI 12L15 Steel, hot rolled, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 12L15 Steel, Hot Rolled Round Bar (19-38 mm)** **Overview** AISI 12L15 is a premium low-carbon, **leaded, resulfurized, and calcium-treated** free-machining steel supplied as a **hot rolled round bar** in the diameter range of **19-38 mm**. This grade represents an advanced evolution of leaded free-machining steels, combining the internal lubrication of lead with the inclusion shape control benefits of calcium treatment. The result is a material engineered for **exceptional machinability, superior tool life, and excellent chip control**, particularly in high-speed machining operations where surface finish and dimensional consistency are critical. Supplied in the economical as-rolled condition, 12L15 offers a balanced approach to high-productivity manufacturing for non-structural components. **Key Features & Advantages** * **Enhanced Machinability & Tool Life:** The combination of lead (internal lubrication) and calcium treatment (inclusion modification) significantly reduces cutting forces and tool wear, enabling higher cutting speeds and feeds while maintaining excellent surface finish. * **Superior Chip Control:** Calcium treatment promotes the formation of softer, more globular sulfide inclusions, which act as more effective chip breakers while reducing abrasive wear on cutting tools. * **Excellent Surface Finish:** Produces superior surface quality on machined components, often rivaling or exceeding that of cold finished materials, reducing the need for secondary finishing operations. * **Improved Consistency:** The calcium treatment helps create a more uniform microstructure, leading to predictable and stable machining behavior across different production batches. * **Production Efficiency:** Enables reduced cycle times, extended tool life, and lower power consumption during machining, providing compelling cost savings in high-volume production. --- ### **1. Chemical Composition (Standard Conformance)** | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | ≤ 0.09 (max) | Very low carbon content maximizes machinability and minimizes work hardening. | | **Manganese (Mn)** | 0.75 – 1.05 | Combines with sulfur and calcium to form modified sulfide inclusions. | | **Phosphorus (P)** | 0.04 – 0.09 | Improves machinability and chip formation. | | **Sulfur (S)** | 0.26 – 0.35 | **Elevated.** Primary chip-breaking agent through modified sulfide formation. | | **Lead (Pb)** | **0.15 – 0.35** | **Internal lubricant.** Reduces friction at the tool-chip interface. | | **Calcium (Ca)** | **0.002 – 0.006** | **Inclusion modifier.** Transforms elongated MnS inclusions into softer, more globular calcium-manganese sulfides. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G12154 * **AISI/SAE:** 12L15 * **ASTM:** A29 (Specification for Steel Bars, Carbon and Alloy, Hot-Wrought) * **DIN (Germany):** 10SPb20+Ca / Similar modified grade * **EN (Europe):** 1.0711+ (modified) * **JIS (Japan):** SUM24L with calcium treatment --- ### **2. Typical Physical & Mechanical Properties (Hot Rolled, As-Rolled Condition)** *Note: This material is optimized for machining performance, with mechanical properties secondary.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | ~7.87 g/cm³ | | **Machinability Rating** | **~190-220%** (Relative to AISI 1212=100%) – Enhanced by calcium treatment | | **Tensile Strength** | 380 – 480 MPa (55 – 70 ksi) | | **Yield Strength (0.2% Offset)** | 275 – 345 MPa (40 – 50 ksi) | | **Elongation (in 50mm)** | 15% – 25% *(Anisotropic properties)* | | **Brinell Hardness (HB)** | 130 – 170 | | **Surface Condition** | Standard hot-rolled mill scale surface. | --- ### **3. Product Applications** AISI 12L15 hot rolled rounds are specified for demanding machining applications where tool life and surface finish are paramount: * **High-Speed Screw Machine Parts:** Complex components for automotive fuel systems, hydraulic valves, and precision instruments requiring excellent surface finish. * **Fastener Manufacturing:** High-volume production of nuts, bolts, and specialized fasteners where tool wear reduction is critical. * **Electrical Components:** Connector pins, terminals, and switch parts requiring superior machined surfaces. * **Consumer Electronics:** Precision parts for cameras, small appliances, and electronic devices. * **General Precision Components:** Any high-volume part where extended tool life and reduced machining time justify material selection. --- ### **4. Critical Considerations & Limitations** * **Health & Safety Regulations:** **CONTAINS LEAD (0.15-0.35%).** Requires proper handling 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. * **Mechanical Limitations:** **Not for structural applications.** Poor transverse ductility and impact toughness. Cannot be heat-treated for strengthening. * **Thermal Restrictions:** Avoid temperatures above 250°C (480°F) to prevent lead migration and surface degradation. * **Regulatory Compliance:** Subject to RoHS, REACH, and other regulations. Use may be restricted in food-contact, potable water, and certain consumer applications. * **Cost Premium:** Higher material cost compared to non-leaded grades due to specialized manufacturing and handling requirements. * **Comparison to 12L14:** 12L15 offers improved tool life and more consistent machinability due to calcium treatment, but at a higher cost. 12L14 remains the more common leaded free-machining grade. **Disclaimer:** AISI 12L15 is a specialized machining steel designed for maximum production efficiency in controlled industrial environments. Its use requires strict adherence to safety protocols for lead handling and compliance with all applicable 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, including appropriate ventilation, personal protective equipment, and hazardous waste management procedures. -:- For detailed product information, please contact sales. -: AISI 12L15 Steel, hot rolled, 19-38 mm round Specification Dimensions Size： Diameter 20-1000 mm Length <5015 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 12L15 Steel, hot rolled, 19-38 mm round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 12L15 Steel, hot rolled, 19-38 mm round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 12L15 Steel, hot rolled, 19-38 mm round -:- For detailed product information, please contact sales. -:

Packing of AISI 12L15 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 1486 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