AISI 1211 Steel Foil/Strip

AISI 1211 Steel Foil, cold drawn, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: AISI 1211 Steel Foil, cold drawn, 19-38 mm round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1211 Steel, cold drawn, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1211 Steel, Cold Drawn Round Bar (19-38 mm)** **Overview** AISI 1211 is a premium low-carbon, resulfurized and rephosphorized free-machining steel supplied as a **cold drawn round bar** in the diameter range of **19-38 mm**. This product represents the highest quality form of this benchmark machinability steel, combining the exceptional chip-breaking characteristics of AISI 1211 with the enhanced dimensional accuracy, superior surface finish, and improved mechanical properties imparted by the cold drawing process. It is specifically engineered for high-precision, high-volume machining applications where consistent performance, tight tolerances, and excellent as-machined surface quality are critical requirements. **Key Features & Advantages** * **Optimal Machinability:** Retains the industry-leading machinability rating of AISI 1211, enabling maximum cutting speeds, extended tool life, and excellent chip control. The cold worked structure can further enhance chip brittleness. * **Precision Dimensional Control:** Cold drawing produces bars with tight diameter tolerances (per ASTM A108), excellent straightness, and uniform cross-section, essential for stable performance in automatic feeders and CNC programs. * **Superior Surface Finish:** Features a smooth, bright, and scale-free surface directly from the mill. This improves part aesthetics, reduces friction in bearing applications, and can minimize secondary finishing operations. * **Enhanced Mechanical Properties:** The cold working process increases yield and tensile strength compared to the hot-rolled condition, providing a stronger base material for machined components. * **Production Efficiency:** Delivers consistent quality that reduces setup time, minimizes material waste, and optimizes cycle times in high-volume manufacturing environments. --- ### **1. Chemical Composition (Standard Conformance)** The chemistry is specifically tailored to maximize machinability, with controlled levels of sulfur and phosphorus. | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | ≤ 0.13 (max) | Kept very low to ensure good ductility and prevent excessive hardening during machining. | | **Manganese (Mn)** | 0.60 – 0.90 | Essential for combining with sulfur to form manganese sulfide (MnS) inclusions, the primary chip-breaking agents. | | **Phosphorus (P)** | 0.07 – 0.12 | **Elevated.** Increases strength and hardness marginally, and significantly improves machinability by promoting short, brittle chips. | | **Sulfur (S)** | 0.10 – 0.15 | **Elevated.** The principal free-machining element. Forms MnS inclusions that act as internal stress concentrators and chip breakers. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G12110 * **AISI/SAE:** 1211 * **ASTM:** **A108** (Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished) * **DIN (Germany):** 9SMn28 / 1.0715 (+C condition for cold drawn) * **EN (Europe):** 1.0715 * **JIS (Japan):** SUM22 (similar) --- ### **2. Typical Physical & Mechanical Properties (Cold Drawn Condition, 19-38 mm)** *Note: Properties reflect the effects of strain hardening from cold drawing. Machinability remains the primary selection criterion.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.87 g/cm³ | | **Machinability Rating** | **~100%** (Remains the **industry benchmark** for free-machining steels). | | **Tensile Strength** | 415 – 550 MPa (60 – 80 ksi) | | **Yield Strength (0.2% Offset)** | **345 – 485 MPa (50 – 70 ksi)** – *Increased via cold work.* | | **Elongation (in 50mm)** | 10% – 20% *(Reduced from hot-rolled due to strain hardening; highly anisotropic)* | | **Brinell Hardness (HB)** | 150 – 190 | | **Surface Roughness (Ra)** | 1.6 – 3.2 μm (63 – 125 μin). Bright, smooth finish. | | **Tolerances** | Meets ASTM A108 cold-drawn tolerances for precision machining. | --- ### **3. Product Applications** AISI 1211 cold drawn rounds are specified for the most demanding high-volume machining applications requiring precision, consistency, and superior finish. * **High-Precision Screw Machine Parts:** Complex small components for automotive fuel systems, hydraulic fittings, pneumatic connectors, and appliance mechanisms. * **Electrical and Electronic Components:** Connector pins, terminals, and shielding parts requiring good conductivity and precise dimensions. * **Fasteners and Studs:** Mass-produced bolts, studs, and specialized fasteners where consistent machining of threads and heads is critical. * **Shafts and Bushings:** Low to moderate stress shafts, guide pins, and bushings that benefit from a smooth bearing surface straight from the bar. * **General Precision Components:** Any part where the cost-saving benefits of ultra-high machinability and reduced secondary processing outweigh the material premium. --- ### **4. Critical Considerations & Limitations** * **Weldability:** **UNSUITABLE FOR FUSION WELDING.** The high sulfur and phosphorus content cause severe **hot cracking** and weld embrittlement. Joining must be mechanical (threads, press fits, etc.). * **Anisotropy:** Mechanical properties are highly directional. Transverse ductility and impact strength are very poor due to the alignment of MnS inclusions. Not for parts subject to significant transverse stresses. * **Stress Relief:** For parts undergoing heavy, asymmetric machining, stress relieving prior to final machining may be necessary to prevent distortion caused by residual stresses from cold drawing. * **Not for Dynamic or High-Stress Loads:** Should not be used for critical structural components, shock load applications, or parts subject to fatigue. * **Comparison to Hot-Rolled 1211:** Offers better surface finish, tighter tolerances, higher strength, and improved straightness. It is the premium, ready-for-precision-machining form. * **Comparison to 1212 CD:** Very similar. 1211 may offer a slight machinability edge in some operations due to higher P, but 1212 is more widely available and often considered the standard. **Disclaimer:** This material is a manufacturing-oriented steel. Selection must be based on its exceptional machinability and precision, with full awareness of its limitations in weldability, transverse ductility, and load-bearing capacity. -:- For detailed product information, please contact sales. -: AISI 1211 Steel, cold drawn, 19-38 mm round Specification Dimensions Size： Diameter 20-1000 mm Length <5003 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 1211 Steel, cold drawn, 19-38 mm round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1211 Steel Foil, cold drawn, 19-38 mm round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1211 Steel Foil, cold drawn, 19-38 mm round -:- For detailed product information, please contact sales. -:

Packing of AISI 1211 Steel Foil/Strip, 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 Foil/Strip 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 1474 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