AISI 1137 Steel, as cold drawn

AISI 1137 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1137 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1137 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 1137 Steel, Cold Drawn, Round Bar (16-22 mm / 0.625-0.875 in)** --- ### **1. Product Overview** **AISI 1137** is a medium-carbon, **resulfurized free-machining steel** specifically processed in the **cold drawn** condition to achieve superior dimensional accuracy, enhanced mechanical properties, and an excellent surface finish. The cold drawing process involves pulling hot-rolled stock through precision dies at room temperature, resulting in significant strain hardening and refined surface characteristics. This datasheet covers **cold drawn round bar** in the **16 mm to 22 mm (0.625 in to 0.875 in)** diameter range—a size particularly optimized for high-volume production of small to medium precision components. This product combines the **free-machining advantages of a sulfur-enhanced steel** with the **strength and precision of cold working**, making it an ideal material for parts requiring extensive machining, tight tolerances, and consistent performance in automated manufacturing systems. **Key Advantages of Cold Drawn AISI 1137 (16-22 mm):** * **Premium Machinability:** The controlled sulfur content ensures excellent chip formation and breakability, allowing for high cutting speeds, superior surface finishes, and extended tool life—critical for cost-effective, high-volume production. * **Enhanced Strength & Dimensional Precision:** Cold working significantly increases tensile and yield strength while delivering tight diameter tolerances (±0.05 mm typical), excellent straightness, and uniform roundness, reducing setup time and scrap rates. * **Superior Surface Quality:** Features a bright, smooth, scale-free surface that is ready for immediate machining or plating, eliminating pre-machining scale removal operations. * **Versatile Heat Treatment Response:** The balanced carbon-manganese content provides good hardenability, allowing components to be heat treated (quenched and tempered) for higher strength applications after machining. --- ### **2. Chemical Composition (Standard % by Weight)** The composition is engineered to optimize machinability while maintaining good hardenability and strength. | Element | Content (%) | Function & Implication | | :--- | :--- | :--- | | **Carbon (C)** | 0.32 - 0.39 | Provides core strength and enables effective response to quenching and tempering heat treatments. | | **Manganese (Mn)** | 1.35 - 1.65 | **Key Hardenability Element.** Ensures sufficient 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 over non-resulfurized grades. | | **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 diameter range.* | Property | Typical Value (Metric) | Typical Value (Imperial) | | :--- | :--- | :--- | | **Tensile Strength** | 650 - 790 MPa | 94,000 - 115,000 psi | | **Yield Strength (0.2% Offset)** | 550 - 690 MPa | 80,000 - 100,000 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%** (AISI 1212 = 100%) | Excellent for a medium-carbon steel; superior to 1045/1144. | --- ### **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 1137 | **ASTM A108** (Standard for Steel Bar, Carbon, Cold-Finished) | | **SAE (USA)** | SAE 1137 | SAE J403, J412 | | **UNS (USA)** | G11370 | - | | **DIN (Germany)** | **1.0735** (40S20) | DIN EN 10277 (Bright steel products) | | **BS (UK)** | **216M36** | BS 970 | | **JIS (Japan)** | **SUM 43** | JIS G4804 (Free-cutting steels) | | **AFNOR (France)** | 40MF4 | NF A35-552 | --- ### **5. Primary Applications** This diameter range of cold drawn AISI 1137 is ideal for small to medium precision components produced in high volumes. * **High-Volume Screw Machine Parts:** Bushings, spacers, fittings, connectors, and small shafts produced on Swiss-type and multi-spindle automatic screw machines. * **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 electrical connectors. * **Hydraulic & Pneumatic Components:** Small cylinder rods, valve spools, and pump parts requiring precise dimensions and smooth surfaces. * **Tooling & Fixtures:** Precision drill bushings, guide pins, and fixture components where dimensional accuracy is critical. * **General Machinery:** Drive shafts, rollers, and spindles for small equipment. --- ### **6. Processing & Fabrication Notes** * **Heat Treatment:** Well-suited for **quenching and tempering**. For optimal results: Austenitize at 830-860°C (1525-1580°F), quench in oil, and temper to desired hardness (typically 28-40 HRC). **Stress relieving** before hardening complex parts is recommended to minimize distortion. * **Machining:** **Excellent machinability.** The MnS inclusions provide predictable chip breaking. 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, anneal before forming. * **Surface Treatments:** The bright finish is ideal for plating (zinc, nickel, chrome) with excellent adhesion. Phosphate coating provides good corrosion resistance for fasteners. * **Quality Control:** Supplied with dimensional tolerances typically meeting ASTM A108 Class B or tighter. Surface defects are minimized through controlled drawing processes. --- ### **7. Economic & Production Considerations** * **Cost Efficiency:** Reduces machining time by 20-30% compared to non-resulfurized steels like 1045, with longer tool life. * **Material Yield:** Tight tolerances minimize machining stock allowance, improving material utilization. * **Production Consistency:** Uniform 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 1137 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4965 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 1137 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1137 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1137 Steel, as cold drawn, 16-22 mm (0.625-0.875 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1137 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 1436 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