AISI 1140 Steel Wire,UNS G11400

AISI 1140 Steel Wire Composition Spec (UNS G11400) Product Information -:- For detailed product information, please contact sales. -: AISI 1140 Steel Wire Composition Spec (UNS G11400) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1140 Steel Composition Spec (UNS G11400) Product Information -:- For detailed product information, please contact sales. -: ## **Product Data Sheet: AISI 1140 Steel Composition Specification (UNS G11400)** --- ### **1. Product Overview** **AISI 1140 (UNS G11400)** is a medium-carbon, **resulfurized free-machining steel** designed as a versatile engineering material that balances machinability with good mechanical strength and hardenability. As a composition specification, it defines the baseline chemical requirements for this grade, which can be supplied in various conditions including hot-rolled, cold-drawn, annealed, normalized, or heat-treated. This steel occupies a strategic position between standard carbon steels (like 1040) and high-sulfur free-machining grades (like 1144/1141). It provides **significantly improved machinability over non-resulfurized grades** while maintaining better transverse ductility and weldability than higher-sulfur variants. AISI 1140 is commonly selected for components that will undergo extensive machining followed by heat treatment to achieve required service properties. **Key Characteristics of AISI 1140 Composition:** * **Enhanced Machinability:** The controlled sulfur addition (0.08-0.13%) provides improved chip breaking and reduced cutting forces compared to non-resulfurized steels of similar carbon content (like 1040). * **Good Strength & Hardenability:** The medium carbon content (0.37-0.44%) combined with manganese (0.70-1.00%) provides a solid foundation for mechanical strength and enables effective heat treatment response. * **Balanced Engineering Properties:** Offers a practical compromise between the excellent machinability of high-sulfur steels and the better weldability/forgeability of standard carbon steels. * **Versatile Processability:** Can be successfully hot worked, cold drawn, and heat treated to meet a wide range of mechanical property requirements. --- ### **2. Chemical Composition (Standard % by Weight) - UNS G11400** The composition is engineered to provide a balance of strength, moderate hardenability, and improved machinability. | Element | Content (%) | Specification Source | Function & Implication | | :--- | :--- | :--- | :--- | | **Carbon (C)** | 0.37 - 0.44 | ASTM A29, SAE J403 | **Primary strength element.** Determines hardenability and maximum achievable strength through heat treatment. | | **Manganese (Mn)** | 0.70 - 1.00 | ASTM A29, SAE J403 | **Moderate Hardenability Agent.** Enhances response to quenching. Combines with sulfur to form beneficial MnS inclusions. | | **Phosphorus (P)** | ≤ 0.040 | ASTM A29, SAE J403 | Residual element, controlled to prevent embrittlement. | | **Sulfur (S)** | 0.08 - 0.13 | **DEFINING ELEMENT.** ASTM A29, SAE J403 | **Machinability Enhancer.** Forms manganese sulfide (MnS) inclusions that act as chip breakers during machining. | | **Iron (Fe)** | Balance | | Base metal. | --- ### **3. Typical Physical & Mechanical Properties (As-Hot Rolled Condition)** *Properties vary significantly with processing condition. Below are representative values for hot-rolled material.* | Property | Typical Range (Hot Rolled) | Notes | | :--- | :--- | :--- | | **Tensile Strength** | 560 - 700 MPa (81,000 - 102,000 psi) | | | **Yield Strength** | 420 - 560 MPa (61,000 - 81,000 psi) | | | **Elongation (in 50 mm)** | 18% - 25% | | | **Hardness** | 170 - 220 HB | | | **Machinability Rating** | **~ 70-75%** (AISI 1212 = 100%) | Good; superior to 1040, less than 1144. | | **Density** | 7.87 g/cm³ | | | **Modulus of Elasticity** | 200 GPa | | **Heat Treated Properties (Example - Quenched & Tempered):** - **Tensile:** 850 - 1000 MPa - **Hardness:** 25 - 35 HRC (tempered) - **Good response to induction hardening** --- ### **4. International Standards & Cross-References** | Standard System | Equivalent Designation | Applicable Specification | Notes | | :--- | :--- | :--- | :--- | | **UNS (USA)** | **G11400** | Unified Numbering System | | | **ASTM (USA)** | AISI 1140 | **ASTM A29** (Hot Rolled), **ASTM A108** (Cold Finished) | | | **SAE (USA)** | SAE 1140 | SAE J403 | | | **DIN (Germany)** | **1.0727** (35S20) | DIN EN 10277 | Similar resulfurized grade with slightly different Mn. | | **BS (UK)** | **212M36** (similar) | BS 970 | Similar properties; exact match requires specification review. | | **JIS (Japan)** | **SUM 43** | JIS G4804 | Close equivalent in function and composition. | | **AFNOR (France)** | 35MF4 | NF A35-552 | | --- ### **5. Primary Applications** AISI 1140 is used for components that benefit from improved machinability during manufacturing and require good mechanical properties in service, often after heat treatment. * **General Machinery Parts:** Shafts, axles, gears, studs, and bolts produced through machining operations. * **Automotive Components:** Transmission parts, gear blanks, clutch components, and various brackets. * **Fastener Manufacturing:** Higher-strength bolts, set screws, and special fasteners. * **Agricultural Equipment:** Pins, bushings, and tillage tool components. * **Tooling & Industrial Equipment:** Jigs, fixtures, and non-cutting tool parts. * **Forged Components:** Parts that are hot forged to shape and then machined and heat treated. --- ### **6. Processing & Fabrication Characteristics** * **Heat Treatment:** Responds well to **quenching and tempering**. Typical process: Austenitize at 830-850°C (1525-1560°F), quench in oil or water (depending on section), temper to desired hardness. Also suitable for **surface hardening** (induction, flame). * **Machinability:** **Good.** The sulfur content provides chip-breaking action. Better than 1040, but not as free-machining as 1144. Recommended machining practices include using sharp tools with positive rake angles. * **Weldability:** **Fair to Poor.** The sulfur content increases susceptibility to hot cracking. Not recommended for critical welded structures. If welding is necessary, use low-hydrogen electrodes with proper pre-heat (200-300°C) and post-weld heat treatment. * **Hot Working:** Good hot workability. Suitable for forging between 1150-900°C (2100-1650°F). * **Cold Working:** Fair in annealed condition. Cold drawing commonly used to produce bright bar. * **Forging:** Excellent forgeability at appropriate temperatures. --- ### **7. Comparison with Key Related Grades** | Grade | Carbon (%) | Sulfur (%) | Manganese (%) | Primary Difference from AISI 1140 | | :--- | :--- | :--- | :--- | :--- | | **AISI 1040** | 0.37-0.44 | ≤0.050 | 0.60-0.90 | Lower sulfur = poorer machinability, better weldability | | **AISI 1141** | 0.37-0.45 | 0.08-0.13 | 1.35-1.65 | Higher Mn = better hardenability, similar machinability | | **AISI 1144** | 0.40-0.48 | 0.24-0.33 | 1.35-1.65 | Higher S & Mn = superior machinability, poorer weldability | | **AISI 1137** | 0.32-0.39 | 0.08-0.13 | 1.35-1.65 | Lower C, higher Mn = slightly lower strength, better hardenability | --- ### **8. Limitations & Design Considerations** 1. **Anisotropy:** Exhibits directional properties due to MnS inclusions. Transverse ductility and impact toughness are typically 20-40% lower than longitudinal properties. 2. **Not for Severe Impact Applications:** The combination of medium carbon and sulfur limits toughness, especially in transverse direction. 3. **Weldability Limitation:** Not suitable for primary structural welding applications without extensive precautions. 4. **Heat Treatment Response:** Hardenability is moderate; large sections may not through-harden completely. --- **Disclaimer:** This specification defines chemical composition only. Mechanical properties depend entirely on processing condition (hot rolled, cold drawn, heat treated, etc.). For application-specific requirements, the processing condition must be specified in addition to the grade. Always consult material certifications and Safety Data Sheets (SDS) for the specific product form being used. -:- For detailed product information, please contact sales. -: AISI 1140 Steel Composition Spec (UNS G11400) Specification Dimensions Size： Diameter 20-1000 mm Length <4974 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 1140 Steel Composition Spec (UNS G11400) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1140 Steel Wire Composition Spec (UNS G11400) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1140 Steel Wire Composition Spec (UNS G11400) -:- For detailed product information, please contact sales. -:

Packing of AISI 1140 Steel Wire Composition Spec (UNS G11400) -:- 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 Wire 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 1445 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