AISI 1141 Steel, as cold drawn

AISI 1141 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1141 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1141 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round Product Information -:- For detailed product information, please contact sales. -: ## **Product Data Sheet: AISI 1141 Steel, Cold Drawn, Round Bar (16-22 mm / 0.625-0.875 in)** --- ### **1. Product Overview** **AISI 1141** is a medium-carbon, **manganese-enhanced resulfurized steel** processed to **cold drawn** condition, offering an optimal combination of enhanced machinability, superior dimensional accuracy, and excellent hardenability. This small-diameter product undergoes precision cold drawing to achieve refined surface characteristics, increased mechanical strength, and tight geometrical tolerances. This datasheet details specifications for **cold drawn round bar** in the **16 mm to 22 mm (0.625 in to 0.875 in)** diameter range—a size specifically optimized for high-volume production of small precision components. The product delivers the **free-machining benefits of sulfur-modified steel** combined with the **strength advantages of cold working** and the **exceptional hardenability** provided by elevated manganese content, making it ideal for parts requiring extensive machining followed by effective heat treatment. **Key Advantages of Cold Drawn AISI 1141 (16-22 mm):** * **Premium Machinability & Chip Control:** The sulfur content ensures superior chip formation and breaking characteristics, enabling high-speed machining, excellent surface finishes, and extended tool life in automated screw machine operations. * **Enhanced Strength & Dimensional Precision:** Cold working significantly increases tensile and yield strength while providing exceptional dimensional accuracy (±0.05 mm typical), excellent straightness, and uniform roundness for consistent automated processing. * **Exceptional Hardenability:** The high manganese content (1.35-1.65%) provides superior through-hardening capability compared to standard resulfurized grades, ensuring effective heat treatment response even in fully machined components. * **Superior Surface Quality:** Features a bright, smooth, scale-free surface ready for immediate machining or plating, eliminating preprocessing steps and reducing manufacturing lead time. --- ### **2. Chemical Composition (Standard % by Weight)** The composition is engineered for maximum machinability, strength, and hardenability in small sections. | Element | Content (%) | Function & Implication | | :--- | :--- | :--- | | **Carbon (C)** | 0.37 - 0.45 | Provides core strength and enables effective response to quenching and tempering heat treatments. | | **Manganese (Mn)** | 1.35 - 1.65 | **Critical Hardenability Element.** Ensures excellent depth of hardening during quenching and combines with sulfur to form beneficial manganese sulfide (MnS) inclusions. | | **Phosphorus (P)** | ≤ 0.040 | Residual element, controlled to prevent embrittlement. | | **Sulfur (S)** | 0.08 - 0.13 | **Primary Machinability Agent.** Forms MnS inclusions that act as internal chip breakers, significantly improving machinability. | | **Iron (Fe)** | Balance | Base metal. | --- ### **3. Typical Physical & Mechanical Properties (Cold Drawn Condition)** *Properties reflect the strain-hardened state from cold drawing in this specific small-diameter range.* | Property | Typical Value (Metric) | Typical Value (Imperial) | | :--- | :--- | :--- | | **Tensile Strength** | 650 - 800 MPa | 94,000 - 116,000 psi | | **Yield Strength (0.2% Offset)** | 550 - 700 MPa | 80,000 - 102,000 psi | | **Elongation (in 50 mm)** | 12% - 18% | 12% - 18% | | **Hardness** | 207 - 269 HB | 207 - 269 HB | | **Surface Finish (Ra)** | 0.4 - 1.2 μm | 16 - 47 μin | | **Machinability Rating** | **~ 85-90%** (AISI 1212 = 100%) | Excellent for a medium-carbon steel; superior to 1045/1144 in balanced properties. | | **Modulus of Elasticity** | 200 GPa | 29,000 ksi | --- ### **4. International Standards & Cross-References** This cold drawn product conforms to international standards for precision cold-finished steel bars. | Standard System | Equivalent Designation | Applicable Specification | | :--- | :--- | :--- | | **ASTM / AISI (USA)** | AISI 1141 | **ASTM A108** (Standard for Steel Bar, Carbon, Cold-Finished) | | **SAE (USA)** | SAE 1141 | SAE J403, J412 | | **UNS (USA)** | G11410 | - | | **DIN (Germany)** | **1.0726** (35S20)* | DIN EN 10277 | *Note: German grade has lower Mn (~1.00%) | | **BS (UK)** | **216M36** (similar) | BS 970 | | **JIS (Japan)** | **SUM 43** (functionally similar) | JIS G4804 | | **AFNOR (France)** | 35MF4 (similar) | NF A35-552 | --- ### **5. Primary Applications** This small-diameter cold drawn AISI 1141 is ideal for high-volume precision components requiring both excellent machinability and effective heat treatment response. * **High-Volume Screw Machine Parts:** Bushings, spacers, fittings, connectors, and small shafts produced on Swiss-type and multi-spindle automatics. * **Precision Fasteners:** High-strength bolts, set screws, dowel pins, and studs requiring consistent dimensions and good thread rolling characteristics. * **Automotive Components:** Fuel injection parts, transmission pins, sensor housings, and small gear blanks. * **Hydraulic & Pneumatic Components:** Small cylinder rods, valve spools, and pump parts requiring precise dimensions. * **Tooling & Fixtures:** Precision drill bushings, guide pins, and fixture components where dimensional accuracy is critical. * **Electrical & Mechanical Components:** Shafts, rollers, and spindles for small equipment and instruments. --- ### **6. Processing & Fabrication Notes** * **Heat Treatment:** **Excellent response to quenching and tempering.** The high manganese ensures uniform through-hardening. Recommended process: Austenitize at 830-850°C (1525-1560°F), oil quench, temper to desired hardness (typically 28-42 HRC). **Stress relieving** before final hardening of complex geometries minimizes distortion. * **Machining:** **Superior machinability.** The MnS inclusions provide excellent chip control. Use sharp tools with positive rake angles. The consistent cold-drawn structure ensures uniform cutting forces across production runs. * **Weldability:** **Poor.** The sulfur content promotes hot cracking. Welding is not recommended for structural applications. If essential, use specialized low-hydrogen procedures with pre-heat and post-weld heat treatment. * **Cold Forming:** Limited due to work hardening. Simple bending is possible; for severe forming, annealing before forming is recommended. * **Surface Treatments:** The bright finish is ideal for plating (zinc, nickel, chrome) with excellent adhesion. Phosphate coating provides good corrosion resistance. * **Quality Control:** Supplied with dimensional tolerances typically meeting ASTM A108 Class B or tighter. Excellent for automated feeding systems. --- ### **7. Economic & Technical Advantages** * **Reduced Machining Time:** 25-35% faster machining compared to non-resulfurized grades like 1045. * **Superior Heat Treatment Consistency:** High manganese ensures uniform hardness development during quenching. * **Minimal Material Waste:** Tight tolerances reduce machining stock allowance, improving material utilization. * **Production Efficiency:** Consistent properties and dimensions ensure stable manufacturing processes with fewer interruptions. --- **Disclaimer:** The information provided is for technical reference. Actual properties may vary with specific manufacturing processes. For critical applications, consultation with the material supplier and prototype testing are recommended. Always review Safety Data Sheets (SDS) and material certifications before use. This material exhibits anisotropic properties typical of resulfurized steels. -:- For detailed product information, please contact sales. -: AISI 1141 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4977 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 1141 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1141 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1141 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1141 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) 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 1448 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