AISI 12L13 Steel Tube,Pipe

AISI 12L13 Steel Tube, cold drawn, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: AISI 12L13 Steel Tube, cold drawn, 19-38 mm round Synonyms -:- For detailed product information, please contact sales. -:

AISI 12L13 Steel, cold drawn, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 12L13 Steel, Cold Drawn Round Bar (19-38 mm)** **Overview** AISI 12L13 is a premium low-carbon, rephosphorized, and **lead-treated** free-machining steel supplied as a **cold drawn round bar** in the diameter range of **19-38 mm**. This product represents the highest-performance form of leaded free-machining steel, combining the internal lubricating properties of lead with the dimensional precision, enhanced strength, and superior surface quality imparted by cold drawing. The uniformly dispersed lead particles dramatically reduce cutting forces and tool wear, while the cold working process ensures tight tolerances and a bright, ready-to-machine finish. This material is engineered for the most demanding, high-volume precision machining applications where **maximizing productivity, achieving exceptional surface finish, and minimizing total manufacturing cost per part are the overriding objectives**. **Key Features & Advantages** * **Ultimate Machinability & Tool Life:** The synergistic combination of lead (internal lubricant), sulfur (chip breaker), and cold work produces unparalleled machining performance. Cutting forces are significantly reduced, enabling higher speeds/feeds, while tool life is dramatically extended compared to both hot-rolled 12L13 and non-leaded cold drawn steels. * **Precision Dimensional Control & Superior Surface Finish:** Cold drawing delivers excellent diameter tolerances (per ASTM A108), straightness, and a smooth, scale-free, bright surface. This reduces setup time, ensures consistency in automated feeders, and provides an excellent base for high-quality machined surfaces. * **Enhanced Mechanical Properties:** The cold working process increases yield and tensile strength over the hot-rolled condition, providing a stronger base material for components. * **Exceptional Chip Control & Surface Quality:** Produces small, easily evacuated chips and outstanding as-machined surface finishes, often eliminating secondary finishing operations. * **Optimized Production Economics:** The significant reductions in cycle time, tooling cost, and scrap rate deliver the lowest possible total cost per part in suitable high-volume applications. --- ### **1. Chemical Composition (Standard Conformance)** | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | ≤ 0.15 (max) | Minimized to ensure maximum machinability and prevent work hardening. | | **Manganese (Mn)** | 0.70 – 1.00 | Combines with sulfur to form manganese sulfide (MnS) inclusions for chip breaking. | | **Phosphorus (P)** | 0.07 – 0.12 | **Elevated.** Improves chip brittleness and machinability. | | **Sulfur (S)** | 0.24 – 0.33 | **Elevated.** Primary free-machining agent for chip breaking. | | **Lead (Pb)** | **0.15 – 0.35** | **The Defining Element.** Added as fine, uniformly dispersed particles. Acts as an internal lubricant at the tool-chip interface, reducing heat and friction. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G12134 * **AISI/SAE:** 12L13 * **ASTM:** **A108** (Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished) * **DIN (Germany):** 9SMnPb28 / 1.0718 * **EN (Europe):** 1.0718 * **JIS (Japan):** SUM22L or SUM24L --- ### **2. Typical Physical & Mechanical Properties (Cold Drawn Condition, 19-38 mm)** *Note: This material is selected for manufacturing performance, not mechanical properties.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | ~7.87 g/cm³ (Slightly higher due to lead) | | **Machinability Rating** | **~180-200%** (Relative to AISI 1212=100%). Among the highest achievable. | | **Tensile Strength** | 420 – 550 MPa (61 – 80 ksi) | | **Yield Strength (0.2% Offset)** | **350 – 480 MPa (51 – 70 ksi)** – *Enhanced via cold work.* | | **Elongation (in 50mm)** | **10% – 20%** *(Low and highly anisotropic; transverse ductility is very poor)* | | **Brinell Hardness (HB)** | 140 – 190 | | **Surface Roughness (Ra)** | 1.6 – 3.2 μm (63 – 125 μin). Bright, smooth finish. | | **Tolerances** | Meets ASTM A108 cold-drawn tolerances. | --- ### **3. Product Applications** AISI 12L13 cold drawn rounds are specified for the most critical, high-volume precision machining applications across advanced industries. * **Complex, High-Precision Screw Machine Components:** Critical parts for automotive fuel injection systems, hydraulic valves, aerospace fittings, and medical instruments. * **High-Volume Fasteners:** Premium nuts, bolts, and special fasteners where thread integrity and production speed are maximized. * **Electrical & Electronic Components:** Precision connector pins, terminals, and shielding parts requiring burr-free machining. * **Consumer Electronics & Appliance Parts:** Gears, shafts, and decorative components where fine finish and high production rates are key. * **Any High-Volume Component** where a **20-30% or greater improvement in machining productivity** (vs. 1215 CD) justifies the material and handling costs. --- ### **4. Critical Considerations & Limitations** * **Health, Safety & Environmental (HSE) Imperatives:** **CONTAINS LEAD.** **Stringent controls are mandatory.** Machining requires **Local Exhaust Ventilation (LEV)** to capture lead-containing dust/mist. Operators need proper **PPE**. Swarf and spent coolant are **hazardous waste** and must be handled accordingly. Use is prohibited in food-contact, potable water, and many consumer product applications. * **Non-Weldable & Non-Heat-Treatable:** **ABSOLUTELY UNWELDABLE.** Lead vaporization creates toxic fumes and causes severe cracking. Cannot be strengthened by heat treatment. * **Very Poor Mechanical Properties:** Exhibits **low strength and extremely poor transverse ductility and impact toughness**. **Unsuitable for any structural, load-bearing, or dynamic applications.** * **Thermal Limitations:** Exposure to temperatures above ~250°C (480°F) can cause lead to sweat out, damaging surfaces and properties. * **Cost & Availability:** Higher material cost and potential supply restrictions due to lead content. Requires certified disposal, adding to total cost. * **Comparison to 1215 CD:** 12L13 CD offers vastly superior machinability and tool life but introduces significant HSE responsibilities and costs. 1215 CD is the standard high-performance, non-leaded alternative. **Disclaimer:** **AISI 12L13 Cold Drawn is a specialized, high-productivity machining material with significant health, safety, and environmental implications.** Its use is justified only by a rigorous cost-benefit analysis in controlled industrial settings. It is **not an engineering material** and is unsuitable for welding, heat treatment, or any application involving mechanical stress. Compliance with all OSHA, EPA, and local regulations regarding lead handling is **mandatory**. -:- For detailed product information, please contact sales. -: AISI 12L13 Steel, cold drawn, 19-38 mm round Specification Dimensions Size： Diameter 20-1000 mm Length <5012 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 12L13 Steel, cold drawn, 19-38 mm round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 12L13 Steel Tube, cold drawn, 19-38 mm round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 12L13 Steel Tube, cold drawn, 19-38 mm round -:- For detailed product information, please contact sales. -:

Packing of AISI 12L13 Steel Tube, cold drawn, 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 Tube 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 1483 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