AISI 1137 Steel, hot rolled

AISI 1137 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1137 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1137 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: ## **Product Data Sheet: AISI 1137 Steel, Hot Rolled Round Bar (19-32 mm / 0.75-1.25 in)** --- ### **1. Product Overview** **AISI 1137** is a medium-carbon, **resulfurized free-machining steel** supplied in the standard **hot rolled** condition. This grade combines a moderate carbon content with controlled sulfur addition, making it a versatile material that bridges the gap between machinability and mechanical strength. Supplied as **hot rolled round bar** in the **19 mm to 32 mm (0.75 in to 1.25 in)** diameter range, this product represents the most economical and readily available form of AISI 1137, featuring a characteristic **mill scale** surface and commercial dimensional tolerances. This material is engineered for components that require **better machinability than standard medium-carbon steels** (like 1045) while maintaining sufficient strength for many mechanical applications. It is particularly suitable for parts that will undergo significant machining operations followed by heat treatment (quenching and tempering) to achieve higher performance properties. **Key Characteristics of Hot Rolled AISI 1137:** * **Enhanced Machinability:** The sulfur addition (0.08-0.13%) provides improved chip breaking and reduced cutting forces compared to non-resulfurized grades, leading to better surface finishes and extended tool life during machining. * **Good Strength & Hardenability:** The medium carbon content (0.32-0.39%) combined with elevated manganese (1.35-1.65%) provides a solid foundation for mechanical strength and enables effective response to heat treatment. * **Cost-Effective Processing:** As a hot-rolled product, it offers the lowest cost entry point for this grade, making it economical for both prototyping and production runs. * **Versatile Foundation:** Serves as an excellent starting material for parts that will be machined, and optionally heat treated, forged, or used in the as-rolled condition for less demanding applications. --- ### **2. Chemical Composition (Standard % by Weight)** The composition is balanced to provide strength, moderate hardenability, and free-machining characteristics. | Element | Content (%) | Function & Implication | | :--- | :--- | :--- | | **Carbon (C)** | 0.32 - 0.39 | Provides core strength and enables effective response to quenching and tempering heat treatments. | | **Manganese (Mn)** | 1.35 - 1.65 | **Critical for Hardenability.** Increases depth of hardening during quenching and combines with sulfur to form beneficial manganese sulfide (MnS) inclusions. | | **Phosphorus (P)** | ≤ 0.040 | Residual element, controlled to maintain toughness. | | **Sulfur (S)** | 0.08 - 0.13 | **Machinability Enhancer.** Forms MnS inclusions that act as chip breakers during machining, improving machinability but slightly reducing transverse ductility. | | **Iron (Fe)** | Balance | Base metal. | --- ### **3. Typical Physical & Mechanical Properties (Hot Rolled Condition)** *Properties are as-rolled and can vary based on the mill's finishing temperature and cooling practice. The presence of mill scale is standard.* | Property | Typical Value (Metric) | Typical Value (Imperial) | | :--- | :--- | :--- | | **Tensile Strength** | 550 - 690 MPa | 80,000 - 100,000 psi | | **Yield Strength (0.2% Offset)** | 415 - 550 MPa | 60,000 - 80,000 psi | | **Elongation (in 50 mm / 2 in)** | 15% - 22% | 15% - 22% | | **Reduction of Area** | 40% - 55% | 40% - 55% | | **Hardness** | 179 - 229 HB | 179 - 229 HB | | **Surface Condition** | **Mill Scale** | Dark, oxidized layer from hot rolling. | | **Dimensional Tolerance** | **Commercial** | Per standards like ASTM A29. | | **Machinability Rating** | **~ 75-80%** (AISI 1212 = 100%) | Good; significantly better than non-resulfurized 10xx series steels. | | **Modulus of Elasticity** | 200 GPa | 29,000 ksi | --- ### **4. International Standards & Cross-References** Hot rolled AISI 1137 conforms to standard specifications for hot-rolled carbon steel bars. | Standard System | Equivalent Designation | Applicable Specification | | :--- | :--- | :--- | | **ASTM / AISI (USA)** | AISI 1137 | **ASTM A29** (Standard Specification for Steel Bars, Carbon) | | **SAE (USA)** | SAE 1137 | SAE J403, J412 | | **UNS (USA)** | G11370 | - | | **DIN (Germany)** | **1.0735** (40S20) | DIN 1651-1 / EN 10087 | | **BS (UK)** | **216M36** | BS 970 | | **JIS (Japan)** | **SUM 43** | JIS G4804 (Free-cutting steels) | --- ### **5. Primary Applications** Hot rolled AISI 1137 is selected as a versatile raw material for parts that require good machinability and the potential for subsequent heat treatment or forging. * **General Machined Components:** Shafts, pins, studs, gears, and sprockets that are machined from bar stock and may be used as-machined or heat-treated. * **Forging Blanks:** An excellent choice as stock for hot forging into more complex shapes like levers, connecting rods, tool heads, and automotive components. * **Automotive Parts:** Transmission components, gear blanks, clutch parts, and various brackets that benefit from improved machinability. * **Fastener Stock:** Used for manufacturing bolts, set screws, and other fasteners, often after subsequent cold drawing or heat treatment. * **Agricultural & Industrial Machinery:** Wear parts, linkage components, and pins that can be surface hardened for improved durability. * **Tooling Components:** Jigs, fixtures, and non-cutting tool parts where the combination of machinability and strength is advantageous. --- ### **6. Processing Notes** * **Heat Treatment:** Well-suited for **quenching and tempering**. Typical process: Austenitize at 830-860°C (1525-1580°F), quench in oil (or water for simple shapes with caution), and temper to desired hardness (typically 25-40 HRC). Also suitable for **surface hardening** processes like induction or flame hardening. * **Machining:** **Good machinability.** The sulfur content provides effective chip breaking, but the medium carbon content makes it stronger than low-carbon free-machining steels. Use sharp, robust tools with adequate coolant. Consider normalizing before machining complex parts for more consistent results. * **Weldability:** **Fair to Poor.** The combination of medium carbon and sulfur increases susceptibility to heat-affected zone (HAZ) cracking. Welding is not recommended for critical applications. If necessary, use low-hydrogen electrodes with pre-heat (200-300°C) and post-weld stress relief. * **Surface Preparation:** **Mill scale must be removed** prior to precision machining, heat treatment, or plating. Methods include shot blasting, pickling, or turning. * **Cold Forming:** Moderate ductility allows for simple bending. For severe cold forming, an annealing treatment is recommended to restore maximum ductility. * **Forging:** Excellent hot workability. Forge at 1100-900°C (2010-1650°F) with gradual reduction ratios. --- **Disclaimer:** The information provided is for general reference. Properties and surface condition can vary between manufacturing lots. For critical applications, testing of the specific material and consultation with the supplier is recommended. Always consult the relevant Safety Data Sheets (SDS) and material certifications before use. Note that anisotropic behavior (direction-dependent properties) is more pronounced in resulfurized steels like AISI 1137. -:- For detailed product information, please contact sales. -: AISI 1137 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4963 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 1137 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1137 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1137 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1137 Steel, hot rolled, 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 1434 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