AISI 1118 Steel, as rolled

AISI 1118 Steel, as rolled Product Information -:- For detailed product information, please contact sales. -: AISI 1118 Steel, as rolled Synonyms -:- For detailed product information, please contact sales. -:

AISI 1118 Steel, as rolled Product Information -:- For detailed product information, please contact sales. -: ## **Product Data Sheet: AISI 1118 Steel, As-Rolled** --- ### **1. Product Overview** **AISI 1118** is a low-carbon, **direct-hardening grade** steel supplied in the **as-rolled (or hot-rolled)** condition. This state represents the most economical and common form in which this grade is provided. Unlike the sulfur-enhanced free-machining steels (e.g., 1117, 12L14), AISI 1118 is characterized by its **higher manganese content and controlled low sulfur level**, making it unsuitable for high-speed free-machining but excellent for applications requiring good through-hardenability, surface hardening via flame or induction, and better weldability. The as-rolled condition means the steel has been shaped to its final dimensions (e.g., round bar, flat bar, plate) at high temperatures, resulting in a surface with **mill scale** and mechanical properties that are moderately improved over a normalized state due to the controlled finishing temperature. **Key Characteristics of As-Rolled AISI 1118:** * **Good Through-Hardenability:** The balanced carbon (0.14-0.20%) and elevated manganese (1.30-1.60%) content allow for effective hardening of larger sections than typical low-carbon steels, either through quenching and tempering or surface hardening methods. * **Improved Weldability:** Lower sulfur and phosphorus levels compared to free-machining grades significantly reduce the risk of hot cracking, making it a suitable choice for fabrications requiring welding. * **Good Cold Formability & Machinability:** In its as-rolled (soft) condition, it offers good ductility for bending and forming. Its machinability is fair, typical of a low-carbon steel without chip-breaking additives. * **Cost-Effective Foundation:** The as-rolled product serves as a versatile, economical raw material for components that will undergo significant secondary processing like forging, machining, and heat treatment. --- ### **2. Chemical Composition (Standard % by Weight)** The composition is optimized for hardenability and general-purpose use, not for free-machining. | Element | Content (%) | Function & Implication | | :--- | :--- | :--- | | **Carbon (C)** | 0.14 - 0.20 | Provides core strength and is the primary element for response to hardening. | | **Manganese (Mn)** | 1.30 - 1.60 | **Key Element.** Significantly increases hardenability, allowing deeper and more uniform hardening upon quenching. Also aids in deoxidation. | | **Phosphorus (P)** | ≤ 0.040 | Residual element, kept low to maintain toughness. | | **Sulfur (S)** | ≤ 0.050 | **Kept Low.** This distinguishes it from 1117. Low sulfur improves weldability and hot workability but reduces machinability. | | **Iron (Fe)** | Balance | Base metal. | --- ### **3. Typical Physical & Mechanical Properties (As-Rolled Condition)** *Properties are representative for medium sections. The presence of mill scale is standard.* | Property | Typical Value (Metric) | Typical Value (Imperial) | | :--- | :--- | :--- | | **Tensile Strength** | 420 - 520 MPa | 61,000 - 75,000 psi | | **Yield Strength (0.2% Offset)** | 310 - 380 MPa | 45,000 - 55,000 psi | | **Elongation (in 50 mm / 2 in)** | 25% - 35% | 25% - 35% | | **Reduction of Area** | 50% - 65% | 50% - 65% | | **Hardness** | 137 - 174 HB | 137 - 174 HB | | **Surface Condition** | **Mill Scale** | Dark, oxidized layer from hot rolling. | | **Machinability Rating** | ~ 65-70% (AISI 1212 = 100%) | Fair; requires more power and yields continuous chips. | --- ### **4. International Standards & Cross-References** As-rolled AISI 1118 conforms to standard hot-rolled carbon steel bar specifications. | Standard System | Equivalent Designation | Applicable Specification | | :--- | :--- | :--- | | **ASTM / AISI (USA)** | AISI 1118 | ASTM A29 (Standard Spec. for Steel Bars, Carbon) | | **SAE (USA)** | SAE 1118 | SAE J403 | | **UNS (USA)** | G11180 | - | | **DIN (Germany)** | 1.0725 | DIN 17222 / EN 10263-3 (Steel for cold heading and forging) | | **JIS (Japan)** | SWRCH18A* | JIS G3507-1 (Carbon steel wire rods for cold heading) | | **EN (Europe)** | 1.0725 | EN 10263-3 | *Note: SWRCH18A is a close equivalent often used for cold heading, with similar C and Mn ranges.* --- ### **5. Primary Applications** As-rolled AISI 1118 is selected as a versatile raw material for parts that require good core properties and will undergo significant secondary processing, particularly heat treatment. * **Forging Blanks:** A prime choice for hot forging into components like gears, levers, connecting rods, and fasteners that will be heat-treated afterward. * **Heat-Treated Components:** Parts destined for **quenching and tempering** to achieve a uniform, tempered martensite structure with good strength and toughness (e.g., shafts, pins, bolts). * **Surface Hardened Parts:** Ideal for **induction hardening** or **flame hardening** to create a wear-resistant surface on gears, camshafts, and bearing journals, while the core remains tough. * **General Fabrication:** Used for welded structures or parts where its better weldability (vs. free-machining steels) is an advantage, provided the design accommodates its lower as-rolled strength. * **Cold Heading & Forming:** Suitable for moderate cold-forming operations to make bolts, nuts, and other fasteners, thanks to its good ductility. --- ### **6. Processing Notes** * **Heat Treatment (Primary Use):** Excellently suited for **through-hardening (quench & temper)**. Typical process: Austenitize at 830-870°C (1525-1600°F), quench in oil or water (depending on section size), and temper to desired hardness (e.g., 25-45 HRC). Also excellent for **induction/flame hardening**. * **Machining:** **Fair machinability.** Produces long, stringy chips. Use sharp tools, positive rake angles, and powerful chip breakers. Pre-annealing or normalizing can improve machinability for complex parts. * **Weldability:** **Good** for a low-carbon steel. Standard arc welding processes (SMAW, GMAW, GTAW) can be used with common low-carbon electrodes/fillers. Pre-heat is generally not required for thin sections but is recommended for thick parts to manage cooling rates. * **Cold Working:** Good ductility allows for bending, rolling, and cold heading. Annealing may be required between severe forming steps. * **Surface Preparation:** Mill scale must be removed (via pickling, shot blasting, or machining) prior to most finishing operations, painting, or precise machining. --- **Disclaimer:** The information provided is for general reference. The as-rolled condition can exhibit variations in properties based on the rolling mill's finishing temperature and cooling practice. For performance-critical applications, testing of the specific material lot is recommended. Always consult the relevant Safety Data Sheets (SDS) and material certifications before use. -:- For detailed product information, please contact sales. -: AISI 1118 Steel, as rolled Specification Dimensions Size： Diameter 20-1000 mm Length <4940 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 1118 Steel, as rolled Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1118 Steel, as rolled -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1118 Steel, as rolled -:- For detailed product information, please contact sales. -:

Packing of AISI 1118 Steel, as rolled -:- 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 1411 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