AISI 1213 Steel, hot rolled

AISI 1213 Steel, hot rolled, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: AISI 1213 Steel, hot rolled, 19-38 mm round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1213 Steel, hot rolled, 19-38 mm round Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1213 Steel, Hot Rolled Round Bar (19-38 mm)** **Overview** AISI 1213 is a highly specialized, low-carbon, resulfurized and rephosphorized free-machining steel supplied as a **hot rolled round bar** in the diameter range of **19-38 mm**. Distinguished by a significantly higher sulfur content than the standard AISI 1212, this grade is engineered for applications demanding the **absolute highest level of machinability** where surface finish and chip control are paramount. It represents the pinnacle of free-cutting performance in low-carbon steels, enabling exceptional productivity in high-speed, automated machining operations at the expense of mechanical properties, weldability, and transverse ductility. **Key Features & Advantages** * **Ultimate Machinability:** Contains the highest sulfur content among common AISI 12xx series steels, resulting in superior chip-breaking characteristics, reduced cutting forces, maximum possible cutting speeds, and extended tool life. Its machinability rating typically exceeds 120% of the AISI 1212 standard. * **Exceptional Surface Finish:** Produces outstanding surface quality on machined components, often eliminating the need for secondary finishing operations due to its fine, discontinuous chip formation. * **Optimized for High-Speed Production:** Specifically designed for maximum throughput in screw machines, CNC lathes, and other automated equipment where minimizing cycle time is critical. * **Cost-Effective for High-Volume Machining:** The reduction in machining time, tool wear, and energy consumption can lead to significant overall cost savings in large production runs. * **Consistent Performance:** Provides predictable machining behavior essential for automated manufacturing processes. --- ### **1. Chemical Composition (Standard Conformance)** The chemistry is specifically tailored for extreme machinability, featuring the highest sulfur content in its class. | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | ≤ 0.13 (max) | Kept very low to minimize work hardening and maintain basic formability. | | **Manganese (Mn)** | 0.70 – 1.00 | Elevated to combine with the high sulfur content and form abundant manganese sulfide (MnS) inclusions. | | **Phosphorus (P)** | 0.07 – 0.12 | **Elevated.** Increases strength slightly and promotes chip brittleness. | | **Sulfur (S)** | **0.24 – 0.33** | **Very High.** This is the **defining characteristic** of AISI 1213. The elevated sulfur content creates a high density of MnS inclusions, providing exceptional chip-breaking action and lubricity at the tool-chip interface. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G12130 * **AISI/SAE:** 1213 * **ASTM:** A29 (Specification for Steel Bars, Carbon and Alloy, Hot-Wrought) * **DIN (Germany):** 9SMn36 / 1.0718 * **EN (Europe):** 1.0718 * **JIS (Japan):** SUM22L (similar high-sulfur grade) --- ### **2. Typical Physical & Mechanical Properties (Hot Rolled, As-Rolled Condition)** *Note: Mechanical properties are secondary to machinability. This grade exhibits the most pronounced anisotropy in the 12xx series.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.87 g/cm³ | | **Machinability Rating** | **~130%** (Relative to AISI 1212=100%). Often cited as having the best machinability among standard carbon steels. | | **Tensile Strength** | 380 – 480 MPa (55 – 70 ksi) | | **Yield Strength (0.2% Offset)** | 275 – 345 MPa (40 – 50 ksi) | | **Elongation (in 50mm)** | **10% – 20%** *(Highly anisotropic; transverse ductility is extremely poor)* | | **Brinell Hardness (HB)** | 130 – 170 | | **Surface Condition** | Standard hot-rolled finish with mill scale. | --- ### **3. Product Applications** AISI 1213 hot rolled rounds are specified for the most demanding high-speed machining applications where machinability is the sole or primary selection criterion. * **Complex Screw Machine Parts:** Intricate components with thin walls or deep drilling requiring exceptional chip control to prevent bird nesting and tool breakage. * **High-Volume Fasteners:** Nuts, bolts, and special fasteners produced at maximum speeds. * **Electrical and Electronic Components:** Connector pins, terminals, and shielding parts where burr-free machining and excellent surface finish are critical. * **Plumbing and Hydraulic Fittings:** Valve bodies, couplings, and adapters requiring precision threads and smooth bores. * **Appliance and Automotive Non-Structural Parts:** High-volume decorative or functional components where surface appearance from machining is important. --- ### **4. Critical Considerations & Limitations** * **Extremely Poor Weldability:** **ABSOLUTELY UNWELDABLE.** The very high sulfur content makes it **catastrophically prone to hot cracking** and severe embrittlement. No fusion welding process is recommended. * **Severe Anisotropy and Low Ductility:** Exhibits the **poorest transverse ductility and impact toughness** of the standard free-machining grades due to the high density of elongated MnS inclusions. Parts are **not suitable for any application involving tensile or impact loads perpendicular to the rolling direction**. * **Very Low Strength:** Suitable only for non-structural, non-load-bearing applications. The high inclusion content significantly weakens the material. * **Poor Forgeability and Cold Formability:** Unsuitable for forging or any significant cold deformation due to its brittle nature. * **Potential for Porosity:** In some casting practices, the high sulfur can lead to micro-porosity, though this is generally controlled in quality bar production. * **Comparison to 1212:** AISI 1213 trades significantly worse mechanical properties (especially transverse) and weldability for a measurable improvement in machinability and surface finish. 1212 is the more balanced and widely used general-purpose free-machining grade. **Disclaimer:** AISI 1213 is a **specialist machining steel** pushed to the extreme of free-cutting performance. Its use must be strictly confined to **high-volume, non-structural, non-welded components** where the economic benefits of reduced machining cost unequivocally outweigh its severe mechanical limitations. Engineering approval is required for any application beyond simple fasteners and screw machine parts. -:- For detailed product information, please contact sales. -: AISI 1213 Steel, hot rolled, 19-38 mm round Specification Dimensions Size： Diameter 20-1000 mm Length <5006 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 1213 Steel, hot rolled, 19-38 mm round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1213 Steel, hot rolled, 19-38 mm round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1213 Steel, hot rolled, 19-38 mm round -:- For detailed product information, please contact sales. -:

Packing of AISI 1213 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 1477 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