AISI 1117 Steel, cold finished

AISI 1117 Steel, cold finished, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1117 Steel, cold finished, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1117 Steel, cold finished, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: ### **Product Data Sheet: AISI 1117 Steel, Cold-Finished Round Bar (19-32 mm / 0.75-1.25 in)** #### **1. Overview** AISI 1117 cold-finished round bar is a premium form of this widely used low-carbon, manganese-sulfurized free-machining steel. The "cold-finished" designation typically encompasses processes like cold drawing, turning, or grinding after hot rolling, resulting in a product with **superior dimensional accuracy, excellent surface finish, and enhanced mechanical properties** compared to its hot-rolled counterpart. This material is engineered for high-volume production of precision components where consistent machinability, tight tolerances, and a bright, ready-to-use surface are critical. It is particularly favored for parts that will undergo further case hardening. --- #### **2. Chemical Composition (AISI/SAE Standard)** | Element | Content (%) | | :--- | :--- | | **Carbon (C)** | 0.14 - 0.20 | | **Manganese (Mn)** | **1.00 - 1.30** | | **Phosphorus (P)** | ≤ 0.040 | | **Sulfur (S)** | **0.08 - 0.13** | | **Iron (Fe)** | Balance | **Key Distinction:** The balanced **manganese (1.00-1.30%)** and **sulfur (0.08-0.13%)** content promotes the formation of type I (globular) manganese sulfide (MnS) inclusions. This provides excellent free-machining characteristics while maintaining better transverse ductility and consistency than grades with higher sulfur or added phosphorus (e.g., 1116, 12L14). --- #### **3. Typical Physical & Mechanical Properties (Cold-Finished Condition)** *Properties reflect the effects of cold work (strain hardening) from the finishing process.* | Property | Typical Value / Description | | :--- | :--- | | **Condition** | Cold-Finished (Cold Drawn, Turned, or Ground) | | **Surface Finish** | Smooth, bright, and scale-free. Typical roughness (Ra) of 0.8-3.2 µm (32-125 µin). | | **Dimensional Tolerance** | **Tight.** Typically meets ASTM A108 "Cold-Finished" tolerances (e.g., ±0.075 mm to ±0.150 mm on diameter), offering excellent consistency for automated feeding. | | **Straightness** | Superior to hot-rolled material. | | **Tensile Strength** | **480 - 620 MPa (70 - 90 ksi)** | | **Yield Strength (0.2% Offset)** | **415 - 550 MPa (60 - 80 ksi)** *(Significantly higher than hot-rolled due to cold work)* | | **Elongation (in 50 mm)** | **~ 15 - 22%** | | **Hardness** | **85 - 100 HRB** (Rockwell B) / **~ 160 - 210 HB** | | **Machinability** | **Excellent (~140-160% of AISI 1212).** The combination of effective MnS inclusions and a uniform, cold-worked structure allows for high cutting speeds, excellent chip control, good surface finish, and extended tool life. | | **Cold Formability** | **Fair.** The cold-worked state increases strength but reduces ductility compared to an annealed condition. Suitable for light bending or forming; not for severe cold heading without prior annealing. | | **Weldability** | **Poor.** The sulfur content increases susceptibility to hot cracking. **Welding is not recommended.** | | **Hardenability** | **Very Low.** Not suitable for through-hardening. An **ideal and popular choice for case hardening (carburizing or carbonitriding)**. | --- #### **4. Key Characteristics & Metallurgical Rationale** * **Precision and Consistency:** The primary advantage. Cold finishing ensures the bar is straight, round, and to precise size, reducing setup time and scrap in automated machining. * **Enhanced Yield Strength:** The cold working process dislocates the microstructure, raising the yield strength, which can be beneficial for the stiffness of slender parts. * **Optimal Machinability Substrate:** The bright surface is free of decarburization and scale, allowing tools to engage clean material immediately. The uniform hardness and inclusion distribution lead to predictable tool wear. * **Superior Surface for Finishing:** The excellent surface quality often reduces or eliminates the need for preliminary turning or grinding before final machining or plating. --- #### **5. Primary Product Applications** This product is the industry-standard choice for precision-machined components, especially those destined for case hardening. * **Case Hardened Components (Primary Use):** **Gears, pinions, shafts, camshafts, bushings, and roller bearings** that are machined and then carburized/carbonitrided. * **High-Volume Screw Machine Parts:** **Complex shafts, fittings, connectors, and hydraulic components** produced on Swiss-style and multi-spindle automatics. * **Automotive & Machinery Components:** **Transmission parts, valve guides, sensor housings, and precision pins**. * **General Precision Machined Parts:** Any application requiring excellent machinability, dimensional accuracy, and a good surface finish straight from the bar. --- #### **6. Relevant International & Industry Standards** | Standard System | Standard Designation | Title / Scope | | :--- | :--- | :--- | | **AISI / SAE / UNS (USA)** | **1117, SAE J403, UNS G11170** | Standard Grade Designation | | **ASTM (USA)** | **ASTM A108** | **Key Standard:** Specification for Steel Bars, Carbon, Cold-Finished, Standard Quality | | **ASTM (USA)** | **ASTM A29/A29M** | General specification for steel bars, covering cold-finished requirements. | | **DIN / EN (Germany/EU)** | **1.0715 / 11SMn30** | EN 10087: Free-cutting steels. A direct equivalent. | | **JIS (Japan)** | **SUM22** | Free Cutting Steel (JIS G4804). A closely related grade. | | **GB (China)** | **Y15** | Free-Cutting Steel (GB/T 8731). | --- ### **Processing Pathway & Selection Guide** 1. **Material Selection:** Choose AISI 1117 cold-finished bar for **precision parts requiring excellent machinability and dimensional consistency**, especially if they will be **case hardened**. It is the default choice for quality screw machine and CNC shops. 2. **Fabrication:** Optimized for all **machining operations: turning, drilling, milling, threading, and grinding**. 3. **Heat Treatment (Typical Path for Wear Parts):** Machine -> **Carburize** (~900-925°C) -> **Quench** (oil) -> **Low-Temperature Temper** (~150-200°C) -> Finish grind. 4. **Finishing:** Excellent substrate for **plating (zinc, nickel), painting, or phosphating** due to its clean, bright surface. 5. **Joining:** **Use mechanical fastening (threads, press fits). Avoid fusion welding.** **Summary:** **AISI 1117 cold-finished round bar is a high-performance, precision-engineered manufacturing material.** It delivers an optimal balance of **exceptional machinability, tight dimensional control, enhanced strength, and superior surface quality**. This combination makes it a cost-effective and reliable choice for the high-volume production of durable, wear-resistant components via machining and case hardening. It is a fundamental material in the automotive, aerospace, and general precision manufacturing industries, valued for its consistency and ability to improve both manufacturing efficiency and final part quality. -:- For detailed product information, please contact sales. -: AISI 1117 Steel, cold finished, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4930 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 1117 Steel, cold finished, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1117 Steel, cold finished, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1117 Steel, cold finished, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1117 Steel, cold finished, 19-32 mm (0.75-1.25 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 1401 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