AISI 1108 Steel Rod/Bar

AISI 1108 Steel Rod, cold drawn, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1108 Steel Rod, cold drawn, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1108 Steel, cold drawn, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: ### **Product Data Sheet: AISI 1108 Steel, Cold Drawn Round Bar (19-32 mm / 0.75-1.25 in)** #### **1. Overview** AISI 1108 is a low-carbon, re-sulfurized ("free-machining") steel supplied in the cold drawn condition. This product is specifically engineered for applications requiring **excellent machinability, good dimensional accuracy, and a smooth surface finish**. The addition of sulfur forms manganese sulfide inclusions that act as chip breakers during machining, significantly improving material removal rates and tool life. The cold drawing process enhances surface quality, tightens dimensional tolerances, and increases yield strength through work hardening. AISI 1108 is not intended for heat treatment or high-strength applications but excels as a cost-effective material for high-volume production of precision components through turning, drilling, and milling operations. --- #### **2. Chemical Composition (AISI/SAE Standard)** | Element | Content (%) | | :--- | :--- | | **Carbon (C)** | 0.08 - 0.13 | | **Manganese (Mn)** | 0.60 - 0.90 | | **Phosphorus (P)** | 0.040 max | | **Sulfur (S)** | **0.08 - 0.13** | | **Iron (Fe)** | Balance | **Key Distinction:** The elevated sulfur content (0.08-0.13%) is the defining characteristic that classifies it as a free-machining steel, distinguishing it from non-resulfurized grades like AISI 1008 or 1010. --- #### **3. Typical Physical & Mechanical Properties (As Cold Drawn)** *Properties are for the cold drawn, work-hardened state, typical for the 19-32 mm diameter range.* | Property | Typical Value / Description | | :--- | :--- | | **Condition** | Cold Drawn (Work Hardened) | | **Tensile Strength** | **420 - 550 MPa (61 - 80 ksi)** | | **Yield Strength (0.2% Offset)** | **350 - 480 MPa (51 - 70 ksi)** | | **Elongation (in 50 mm)** | **~ 15 - 22%** | | **Hardness** | **70 - 85 HRB** (Rockwell B) / **~ 125 - 160 HB** | | **Machinability** | **Excellent (~140-160% of AISI 1212).** The primary advantage. Sulfide inclusions promote short, broken chips, excellent surface finish, and extended tool life at high speeds. | | **Surface Finish** | Smooth, bright, and scale-free finish typical of cold drawing. Superior to hot-rolled products. | | **Dimensional Tolerance** | Tight, consistent tolerances per standards like ASTM A29 for cold-finished bars. | | **Cold Formability** | **Fair.** Suitable for moderate bending and forming operations. More ductile than higher-carbon cold drawn steels. | | **Hardenability** | **Very Low.** Not suitable for through-hardening. Can be case hardened (carburized) to create a hard wear surface over a tough core. | --- #### **4. Key Characteristics & Metallurgical Behavior** * **Free-Machining Performance:** The manganese sulfide (MnS) inclusions are soft and act as internal lubricants and chip breakers, reducing cutting forces and heat generation during machining. * **Improved Surface & Tolerance:** The cold drawing process provides excellent dimensional consistency, straightness, and a bright surface ready for finishing or plating. * **Low Strength, High Ductility:** Offers relatively low tensile and yield strength compared to medium-carbon steels, but good elongation and formability. * **Limited Weldability:** **Fair to Poor.** The high sulfur content can lead to hot cracking (solidification cracking) during welding. If welding is required, specialized low-sulfur filler metals and careful procedures are necessary. Not recommended for critical welds. * **Non-Hardening:** Cannot be strengthened by quenching and tempering. Its properties are primarily derived from cold work. --- #### **5. Primary Product Applications** This product is ideal for high-volume manufacturing of non-critical, precision parts where machinability is the primary driver. * **General Machined Components:** **Bushings, spacers, sleeves, pins, bolts, nuts, and fasteners** produced via screw machining, turning, or drilling. * **Automotive Non-Critical Parts:** **Brackets, linkage parts, sensor housings, and various fittings** not subject to high stress or wear. * **Hydraulic & Pneumatic Fittings:** **Connectors, couplings, and valve bodies** where good machinability for threading and sealing surfaces is key. * **Electrical & Hardware Components:** **Terminal blocks, knobs, and appliance parts** requiring good dimensional stability and surface finish. * **Shafts & Axles for Light Duty:** Non-critical, lightly loaded shafts where precision is more important than strength. --- #### **6. Relevant International & Industry Standards** | Standard System | Standard Designation | Title / Scope | | :--- | :--- | :--- | | **AISI / SAE / UNS (USA)** | **1108, SAE J403, UNS G11080** | Standard Free-Machining Steel Grade | | **ASTM (USA)** | **ASTM A29/A29M** | Specification for Steel Bars, Carbon and Alloy, Hot-Wrought and Cold-Finished | | **ASTM (USA)** | **ASTM A108** | Specification for Steel Bars, Carbon, Cold-Finished, Standard Quality | | **DIN / EN (Germany/EU)** | **1.0711 / 9SMn28** | EN 10087: Free-cutting steels. A common direct equivalent. | | **JIS (Japan)** | **SUM22** | Free Cutting Steel (JIS G4804). | | **GB (China)** | **Y15** | Free-Cutting Steel (GB/T 8731). | --- ### **Processing Pathway & Selection Guide** 1. **Material Selection:** Choose AISI 1108 when the primary manufacturing process is **high-speed machining** and the final part is **not subject to high stress, impact, or wear**. 2. **Fabrication:** Ideal for **turning, drilling, milling, threading, and light cold forming**. 3. **Heat Treatment (If Any):** Generally not performed. Can be **stress-relieved** (~250-300°C) to improve stability for very precise components, or **carburized** if a hard, wear-resistant surface is needed. 4. **Finishing:** Excellent substrate for **plating (zinc, nickel, chrome), painting, or powder coating**. **Weldability Note:** Use caution. Best practice is to design assemblies to avoid welding this grade. If necessary, use low-heat input processes and pre-/post-heat treatments. **Summary:** **AISI 1108 cold drawn round bar is a premier free-machining steel designed for manufacturing efficiency.** It offers **outstanding machinability, good dimensional precision, and a fine surface finish**, making it the material of choice for cost-effective, high-volume production of precision components. Its value lies in **reducing machining time, improving tool life, and lowering total part cost** in applications where high strength is not a requirement. It is a workhorse material in the automotive, hardware, and general manufacturing industries. -:- For detailed product information, please contact sales. -: AISI 1108 Steel, cold drawn, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4921 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 1108 Steel, cold drawn, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1108 Steel Rod, cold drawn, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1108 Steel Rod, cold drawn, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1108 Steel Rod, cold drawn, 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 Rod 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 1392 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