AISI 1141 Steel, as rolled

AISI 1141 Steel, as rolled Product Information -:- For detailed product information, please contact sales. -: AISI 1141 Steel, as rolled Synonyms -:- For detailed product information, please contact sales. -:

AISI 1141 Steel, as rolled Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1141 Hot-Rolled Steel Bar (As-Rolled Condition)** **Overview** AISI 1141 is a versatile, medium-carbon, resulfurized free-machining steel. Supplied in the **"As-Rolled"** condition, this product has undergone the hot-rolling process and is delivered without subsequent heat treatment or cold finishing. This state provides a cost-effective material with a characteristic mill scale surface, good strength, and excellent machinability suitable for a wide range of industrial components that may undergo further forging, machining, or heat treatment. **Key Features & Advantages** * **Excellent Machinability:** The sulfur content forms beneficial manganese sulfide inclusions that break up chips during cutting, reducing tool wear, improving surface finish on machined parts, and allowing for higher production speeds. * **Good Strength & Hardenability:** The balanced carbon and elevated manganese content provide good tensile strength in the as-rolled state and respond well to thermal treatments like quenching and tempering or surface hardening (flame/induction). * **Economic Efficiency:** As the most basic form of supply, hot-rolled material is typically the lowest-cost option, ideal for applications where surface finish is not critical or where material will be fully machined. * **Suitable for Forging:** The as-rolled structure and chemistry make AISI 1141 a suitable candidate for hot forging into near-net-shape parts. --- **1. Chemical Composition (Standard Conformance)** The chemical composition is the defining characteristic of AISI 1141 and conforms to international standards. | Element | Standard Range (%) | Key Function | | :--- | :--- | :--- | | **Carbon (C)** | 0.37 – 0.45 | Provides base strength and hardenability. | | **Manganese (Mn)** | 1.35 – 1.65 | Significantly increases hardenability and strength; combines with sulfur to form MnS for machinability. | | **Phosphorus (P)** | ≤ 0.04 | Residual element (kept low for toughness). | | **Sulfur (S)** | 0.08 – 0.13 | **Free-machining additive.** Forms soft MnS inclusions that act as internal chip breakers. | | **Silicon (Si)** | 0.10 – 0.30 | Acts as a deoxidizer during steelmaking; contributes to strength. | | **Iron (Fe)** | Balance | Base element. | **Key International Standard Equivalents:** * **UNS:** G11410 * **ASTM:** A29 (Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought and Cold-Finished, General Requirements) * **SAE:** J403, J412 (SAE 1141) * **DIN (Germany):** 35S20 / 1.0726 * **EN (Europe):** 35S20 * **JIS (Japan):** SUM43 * **ISO:** 35S20 --- **2. Typical Physical & Mechanical Properties (As-Rolled Condition)** *Note: Properties in the as-rolled state are influenced by the final rolling temperature and cooling rate, leading to natural variation. Values below are typical averages.* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Modulus of Elasticity** | 200 - 210 GPa (29,000 – 30,500 ksi) | | **Poisson's Ratio** | ~0.29 | | **Thermal Conductivity** | ~51.9 W/m·K (at 100°C) | | **Machinability (Comparison)** | ~85% (Based on 100% for AISI 1212) – Excellent for a medium-carbon steel. | | **Tensile Strength** | 550 – 690 MPa (80 – 100 ksi) | | **Yield Strength (0.2% Offset)** | 345 – 485 MPa (50 – 70 ksi) | | **Elongation (in 50mm)** | 18% – 28% | | **Reduction of Area** | 40% – 55% | | **Brinell Hardness (HB)** | 170 – 220 | | **Surface Condition** | Characteristic blue-gray **mill scale** (iron oxide layer). | --- **3. Product Applications** AISI 1141 in the As-Rolled condition is the starting point for many components that undergo further processing. Its primary use is in applications where its free-machining properties and strength are valued. * **General Machined Components:** Shafts, pins, bolts, studs, and gear blanks produced on automatic screw machines and CNC lathes, where the entire surface is machined away. * **Forging Blanks:** Used as stock material for hot-forged parts like automotive connecting rods, lever arms, and other high-strength forged components. * **Industrial Parts:** Spindles, axles, rollers, and other parts that will be heat-treated (quenched & tempered) or surface-hardened after machining. * **Automotive (Non-Critical):** Various stressed components where the as-rolled strength is sufficient or where full machining/heat treatment is planned. * **Tool Bodies & Fixtures:** For jigs, fixtures, and non-cutting tool applications where machinability and stability are important. --- **4. Important Considerations for "As-Rolled" Material** * **Mill Scale:** The surface oxide layer must be removed (via pickling, shot blasting, or machining) for most finishing operations, welding, or to prevent contamination in heat treatment furnaces. * **Dimensional Tolerance:** Hot-rolled products have wider dimensional tolerances compared to cold-finished bars. They are suitable where dimensions are not critical or will be fully machined. * **Internal Stress:** The as-rolled condition may contain residual thermal stresses. For critical machining operations requiring high dimensional stability, stress relieving is often recommended prior to final machining. * **Variability:** Mechanical properties can vary more significantly within a heat and across the bar cross-section compared to heat-treated or cold-worked material. -:- For detailed product information, please contact sales. -: AISI 1141 Steel, as rolled Specification Dimensions Size： Diameter 20-1000 mm Length <4981 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 1141 Steel, as rolled Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1141 Steel, as rolled -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1141 Steel, as rolled -:- For detailed product information, please contact sales. -:

Packing of AISI 1141 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 1452 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