AISI 1215 Steel, turned and polished

AISI 1215 Steel, turned and polished, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: AISI 1215 Steel, turned and polished, 19-38 mm round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1215 Steel, turned and polished, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1215 Steel, Turned and Polished (T&P) Round Bar (19-38 mm)** **Overview** AISI 1215 in the **Turned and Polished (T&P)** condition represents a premium-grade, precision-engineered product supplied as round bars in the **19-38 mm** diameter range. This specific finishing process involves cold drawing followed by **centerless turning** (or precision turning) to achieve exact dimensions, and then **polishing** to impart an exceptionally smooth, bright surface finish. Unlike standard cold drawn material, T&P bars offer superior dimensional accuracy, enhanced surface integrity, and near-elimination of surface imperfections, making them ideal for applications where the bar surface itself serves as a functional bearing or sealing surface, or where exceptional cosmetic appearance and precise fit are required with minimal further processing. **Key Features & Advantages** * **Exceptional Dimensional Accuracy & Surface Finish:** Turning ensures precise diameter control (tighter than standard cold drawn tolerances), while polishing produces a very low surface roughness (typically Ra ≤ 0.8 μm / 32 μin), resulting in a bright, mirror-like finish. * **Superior Surface Integrity:** The turning process removes surface decarburization, seams, and other imperfections inherent in hot-rolled or drawn stock. The final polished surface is clean, uniform, and free of scale, providing excellent consistency for plating, coating, or direct use. * **Excellent Straightness & Geometric Perfection:** The turning process inherently improves straightness and roundness, critical for components in linear motion systems or rotating assemblies to prevent vibration and ensure proper fit. * **Retained Excellent Machinability:** Maintains the very good free-machining characteristics of AISI 1215, allowing for efficient secondary machining of ends, threads, grooves, or other features without compromising the pristine finished surface of the main body. * **Reduced Manufacturing Steps & Cost:** Eliminates the need for customers to perform rough turning, grinding, or extensive polishing operations, acting as a near-net-shape pre-finished material that streamlines production. --- ### **1. Chemical Composition (Standard Conformance)** The composition is optimized for free-machining, featuring very low carbon and high sulfur. | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | ≤ 0.09 (max) | Very low carbon ensures maximum machinability and prevents hardening during the turning/polishing process. | | **Manganese (Mn)** | 0.75 – 1.05 | Essential to combine with sulfur and form manganese sulfide (MnS) inclusions for chip breaking. | | **Phosphorus (P)** | 0.04 – 0.09 | Improves machinability and chip brittleness. | | **Sulfur (S)** | 0.26 – 0.35 | **Primary free-machining agent.** High sulfur content ensures excellent chip-breaking performance during any subsequent machining. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G12150 * **AISI/SAE:** 1215 * **ASTM:** **A108** (Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished). The T&P condition is a specialized finish often supplied to customer-specific requirements or commercial standards. * **DIN (Germany):** 9SMn36 / 1.0718 * **EN (Europe):** 1.0718 * **Common Spec.:** "1215 Turned, Polished, and Peeled" or "1215 TGP" (Turned, Ground, Polished – a similar but more precise process). --- ### **2. Typical Physical & Mechanical Properties (Turned & Polished Condition, 19-38 mm)** *Note: The turning process removes the cold-drawn surface layer, so mechanical properties may more closely resemble those of the core material, slightly reducing the strain-hardening effect seen on the surface of standard cold-drawn bars.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.87 g/cm³ | | **Machinability Rating** | **~90-95%** (Relative to AISI 1212=100%). Excellent. | | **Tensile Strength** | 400 – 530 MPa (58 – 77 ksi) | | **Yield Strength (0.2% Offset)** | **330 – 450 MPa (48 – 65 ksi)** | | **Elongation (in 50mm)** | 15% – 25% | | **Brinell Hardness (HB)** | 135 – 180 | | **Surface Roughness (Ra)** | **0.4 – 1.6 μm (16 – 63 μin)**. Consistently smooth, polished finish. | | **Diameter Tolerance** | Typically **±0.05 mm** or better, depending on specification. Superior to standard cold drawn. | | **Straightness** | Excellent, typically ≤ 0.5 mm/m (0.006 in/ft). | --- ### **3. Product Applications** AISI 1215 T&P rounds are specified for applications requiring a precision-finished outer diameter ready for assembly or minimal final machining. * **Shafts for Bearings and Bushings:** Ready-to-install shafts for light to moderate duty applications where the turned surface acts as the bearing journal. * **Rollers and Pins:** Precision rollers, guide pins, hinge pins, and dowel pins where a smooth, accurate surface is critical for function and fit. * **Hydraulic and Pneumatic Component Bodies:** Valve spools, plungers, and cylinders where the polished surface aids in sealing and reduces friction. * **Fastener Stock for Premium Parts:** Bar stock for manufacturing high-quality bolts, studs, or pins where surface finish and dimensional consistency are paramount. * **Decorative or Cosmetic Trim Components:** Parts where the bright, polished finish is part of the final product appearance. * **General Precision Components:** Any part where starting with a pre-finished, accurate diameter reduces overall machining time and improves quality. --- ### **4. Critical Considerations & Limitations** * **Non-Weldable:** **NOT SUITABLE FOR FUSION WELDING.** The high sulfur content makes it prone to hot cracking. Assembly must be mechanical. * **Anisotropic Properties:** Like all free-machining steels, it exhibits directional properties with lower transverse ductility. Best suited for applications with primarily axial loads. * **Core vs. Surface Properties:** The turning process removes the hardest, cold-worked surface layer. The final surface hardness and strength are slightly lower than on a standard cold-drawn bar but more uniform. * **Not for High-Stress Structural Use:** The low carbon content limits ultimate strength. It is not suitable for highly stressed, structural, or safety-critical load-bearing components. * **Cost Premium:** The additional turning and polishing operations make it more expensive than standard cold-drawn stock, but this cost is offset by reduced downstream processing. * **Comparison to Cold Drawn (CD):** T&P offers better surface finish, tighter tolerances, and better straightness than CD. Comparison to **Drawn, Ground, & Polished (DGP)**: T&P is generally more economical than DGP and suitable where the extreme precision and finish of DGP are not required. Turning is faster and removes more material than grinding. **Disclaimer:** AISI 1215 Turned and Polished is a **precision-finished manufacturing material**. It is engineered for applications where dimensional accuracy, surface quality, and machinability are the primary drivers. Its use is not recommended for welded assemblies or high-integrity structural applications. -:- For detailed product information, please contact sales. -: AISI 1215 Steel, turned and polished, 19-38 mm round Specification Dimensions Size： Diameter 20-1000 mm Length <5010 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 1215 Steel, turned and polished, 19-38 mm round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1215 Steel, turned and polished, 19-38 mm round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1215 Steel, turned and polished, 19-38 mm round -:- For detailed product information, please contact sales. -:

Packing of AISI 1215 Steel, turned and polished, 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 1481 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