Niagara LaSalle 1144 Cold Finished Steel Sheet,Plate

Niagara LaSalle 1144 Cold Finished Steel Sheet/Plate Bar Product Information -:- For detailed product information, please contact sales. -: Niagara LaSalle 1144 Cold Finished Steel Sheet/Plate Bar Synonyms -:- For detailed product information, please contact sales. -:

Niagara LaSalle 1144 Cold Finished Steel Bar Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Niagara LaSalle 1144 Cold Finished Steel Bar** **Niagara LaSalle 1144** is a high-performance **cold finished, medium-carbon, resulfurized steel bar** engineered to provide an exceptional combination of high strength, excellent machinability, and good wear resistance in the as-supplied condition. This product represents Niagara LaSalle's premium-grade production of the AISI/SAE 1144 alloy, also widely known in its proprietary enhanced form as **Stressproof®**. The cold drawing process imparts superior mechanical properties, dimensional accuracy, and surface quality compared to standard hot-rolled material. As a resulfurized grade with elevated manganese, 1144 is specifically formulated to bridge the gap between high-strength medium-carbon steels and free-machining steels. It delivers remarkable "ready-to-use" properties that often eliminate the need for heat treatment, making it a cornerstone material for demanding applications requiring both machinability and structural integrity. --- ## **1. Chemical Composition (Per AISI/SAE 1144)** The composition adheres to the AISI/SAE 1144 specification, featuring a distinctive balance of elements optimized for strength and machinability. | Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | | :--- | :--- | :--- | :--- | :--- | | **Content** | 0.40 - 0.48 | 1.35 - 1.65 | ≤ 0.040 | 0.24 - 0.33 | **Key Characteristics of the Composition:** * **Medium Carbon with High Manganese & Sulfur:** This unique trio creates a steel with distinct advantages: * **Carbon & Manganese:** Provide a strong, hardenable base. The high manganese (over 1.35%) ensures hardenability and ties up sulfur into beneficial inclusions. * **Controlled High Sulfur:** Forms an abundance of manganese sulfide (MnS) inclusions that act as superb internal chip breakers, granting **outstanding machinability**. * **Free-Machining Structure:** The MnS inclusions lubricate the cutting tool and produce small, broken chips, enabling high-speed machining with excellent surface finishes and extended tool life. * **Strain-Hardening Response:** The chemistry is highly responsive to cold work, allowing the cold drawing process to achieve significant increases in yield and tensile strength. --- ## **2. Physical & Mechanical Properties (Cold Drawn Condition)** Cold drawing transforms 1144 into a high-strength engineering material with machining characteristics rivaling many softer steels. | Property | Typical Value - Cold Drawn | **Engineering Significance** | | :--- | :--- | :--- | | **Yield Strength (0.2% Offset)** | **100,000 psi (690 MPa) Minimum** | **Exceptionally high yield strength** for an as-supplied, machinable steel, often meeting the requirements of Grade 8 fasteners without heat treatment. | | **Tensile Strength** | 115,000 psi (793 MPa) Minimum | | | **Elongation (in 2")** | **10%** (Minimum) | Maintains useful ductility despite high strength. | | **Hardness** | **248 - 302 HB** (24 - 32 HRC) | Provides **good inherent wear resistance** directly from the mill. | | **Machinability** | **~80% of 1212** | **Excellent machinability for its strength level**, significantly better than non-resulfurized grades like 1045 or 4140. | | **Surface Finish (As-Drawn)** | **32 - 63 µin Ra (0.8 - 1.6 µm)** | Superior, scale-free surface ideal for precision components. | | **Dimensional Tolerance** | Meets **ASTM A108** precision tolerances. | Excellent for high-volume, precision machining. | | **Fatigue Strength** | Good | Suitable for dynamically loaded components. | | **Response to Heat Treatment:** | Can be through-hardened (quenched & tempered) for even higher strength, but is most commonly used in the cold-drawn condition. | | **Note on Stressproof®:** Niagara LaSalle's proprietary **Stressproof®** is a closely related, enhanced version of 1144 produced under stricter controls to guarantee a minimum yield strength of 100,000 psi, superior straightness, and stress relief. Standard 1144 offers similar characteristics, with Stressproof® representing the premium, performance-guaranteed variant. --- ## **3. Product Applications** Niagara LaSalle 1144 Cold Finished Bar is the material of choice for a vast range of highly stressed, precision-machined components where the cost and distortion of heat treatment must be avoided. * **High-Strength Fasteners & Studs:** **Bolts, studs, and pins** requiring Grade 8 or similar properties without quenching & tempering. * **Shafting & Axles:** **Automotive axle shafts, pump shafts, spindle shafts, and lead screws** that require strength, wear resistance, and machinability. * **Hydraulic & Pneumatic Components:** **Piston rods, cylinder barrels, valve bodies, and hydraulic fittings.** * **General Machinery Parts:** **Gears, pinions, couplings, cams, and arbors** subjected to high loads and wear. * **Automotive & Off-Highway:** **Steering components, U-joint yolks, and transmission parts.** --- ## **4. International & Equivalent Standards** While AISI 1144 is a distinct North American grade, it has functional equivalents in other systems, though exact chemical matches are rare. | Standard System | Equivalent / Comparable Grade | **Notes & Key Distinctions** | | :--- | :--- | :--- | | **AISI / SAE** | **1144** (Cold Drawn) | The direct U.S. standard. | | **ASTM** | **A108** | Governing standard for the cold-finished condition. | | **UNS** | G11440 | Unified Numbering System. | | **DIN (EN)** | **1.0762 (44SMn28)** | The closest European free-cutting steel. Note: European "SMn" grades often have higher sulfur and may not match the high manganese of 1144. | | **ISO** | ISO 683-9: Type 1.0762 | International standard for free-cutting steels. | | **JIS** | - | No direct equivalent; SUM43 or similar high-sulfur grades are functionally closest for machinability. | | **GB (China)** | **Y40Mn** | Chinese free-cutting steel with high sulfur and manganese, similar in application. | | **Proprietary** | **Stressproof®** | Niagara LaSalle's enhanced, property-guaranteed version of 1144. | **Crucial Distinction:** 1144 is unique for its **high sulfur (free-machining) AND high manganese (high strength)** combination. Many international "free-cutting" equivalents prioritize machinability over strength and do not achieve the same high yield strength in the cold-drawn condition. --- ## **5. Key Advantages & Considerations** **Advantages:** * **High Strength, No Heat Treat:** Delivers heat-treated strength levels directly from the mill, eliminating distortion, scaling, and cost of Q&T. * **Superb Machinability:** Exceptional chip-breaking and surface finish for a high-strength steel, boosting productivity. * **Excellent Wear Resistance:** The naturally hard surface is suitable for bearing and sliding applications. * **Good Dimensional Stability:** Cold drawing and stress-relieving minimize distortion during machining. **Considerations:** * **Anisotropic Properties:** Transverse ductility and impact strength are low due to MnS stringers. **Not suitable for critically stressed parts loaded perpendicular to the grain.** * **Poor Weldability:** **Not recommended for welding.** High sulfur content guarantees hot cracking. * **Limited Through-Hardenability:** While possible, through-hardening is not its primary use case. The high sulfur can lead to quench cracking. For very high core hardness, use 4140 or 4340. * **Corrosion & Hydrogen Embrittlement:** Susceptible to rust and, if plated (e.g., cadmium, zinc), requires proper baking to avoid hydrogen embrittlement due to its high strength. --- **Disclaimer:** The properties listed are typical for cold-drawn 1144. The significant directionality of properties must be a key design consideration. For critical applications, always consult **official Niagara LaSalle material certifications and technical data sheets**. For guaranteed minimum properties (especially 100 ksi yield), specify **Stressproof®**. Professional machining and finishing advice is recommended. -:- For detailed product information, please contact sales. -: Niagara LaSalle 1144 Cold Finished Steel Bar Specification Dimensions Size： Diameter 20-1000 mm Length <5072 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. -: Niagara LaSalle 1144 Cold Finished Steel Bar Properties -:- For detailed product information, please contact sales. -:

Applications of Niagara LaSalle 1144 Cold Finished Steel Sheet,Plate Bar -:- For detailed product information, please contact sales. -: Chemical Identifiers Niagara LaSalle 1144 Cold Finished Steel Sheet,Plate Bar -:- For detailed product information, please contact sales. -:

Packing of Niagara LaSalle 1144 Cold Finished Steel Sheet/Plate Bar -:- 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 Sheet/Plate 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 1543 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