AISI 1039 Steel, hot rolled

AISI 1039 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1039 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1039 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: AISI 1039 Hot Rolled Steel Round Bar (19-32 mm / 0.75-1.25 in)** --- #### **1. Product Overview** AISI 1039 Hot Rolled Round Bar is a medium-carbon steel supplied in the as-rolled condition with a characteristic mill scale surface. With carbon content at the higher end of the standard 10xx series, it offers increased strength and hardenability compared to grades like 1035 or 1038, while maintaining good toughness and formability. The hot-rolled process provides an economical material solution for applications requiring reliable strength and the potential for subsequent heat treatment. The 19-32 mm (0.75-1.25 in) diameter range is a standard stock size widely used across general engineering and manufacturing sectors. --- #### **2. Key Characteristics & Advantages** * **Higher Strength:** Elevated carbon content provides greater tensile and yield strength. * **Good Hardenability:** Responds well to through-hardening and surface hardening processes. * **Cost-Effective Production:** Hot-rolled condition offers the most economical form. * **Good Machinability:** Can be machined effectively in the as-rolled or annealed condition. * **Versatile Fabrication:** Suitable for forging, welding (with precautions), and moderate cold forming. * **Readily Available:** A common grade within the medium-carbon steel family. --- #### **3. Chemical Composition** | Element | Composition (% by weight) | Standard Reference | | :--- | :--- | :--- | | **Carbon (C)** | 0.37 - 0.44 | ASTM A29 / SAE J403 | | **Manganese (Mn)** | 0.70 - 1.00 | ASTM A29 / SAE J403 | | **Phosphorus (P)** | ≤ 0.040 | ASTM A29 / SAE J403 | | **Sulfur (S)** | ≤ 0.050 | ASTM A29 / SAE J403 | | **Silicon (Si)** | 0.15 - 0.35 (typical) | ASTM A29 / SAE J403 | | **Iron (Fe)** | Balance | - | *Note: The carbon range places AISI 1039 at the upper boundary of medium-carbon steels, closely overlapping with AISI 1040.* --- #### **4. Typical Mechanical Properties (As-Hot Rolled)** *Properties are typical for the specified diameter range and may vary with exact chemistry and rolling practice.* | Property | Typical Value / Range | Test Standard | | :--- | :--- | :--- | | **Tensile Strength** | 560 - 690 MPa (81 - 100 ksi) | ASTM A370 | | **Yield Strength (0.2% offset)** | 400 - 515 MPa (58 - 75 ksi) | ASTM A370 | | **Elongation in 50 mm (2")** | 16% - 21% | ASTM A370 | | **Reduction of Area** | 40% - 50% | ASTM A370 | | **Brinell Hardness** | 170 - 217 HB | ASTM E10 | | **Modulus of Elasticity** | 200 GPa (29 x 10⁶ psi) | ASTM E111 | | **Machinability (Annealed)** | ~50% (vs. 100% for 1212 Steel) | - | | **Density** | 7.87 g/cm³ (0.284 lb/in³) | - | --- #### **5. International Standards & Equivalent Grades** | Standard System | Equivalent Designation | Primary Specification | | :--- | :--- | :--- | | **UNS** | G10390 | Unified Numbering System | | **SAE / AISI** | 1039 | SAE J403 | | **ASTM** | Grade 1039 | ASTM A29, ASTM A576 | | **EN (Europe)** | 1.1158 (C40E) | EN 10083-2 | | **ISO** | C40E | ISO 683-18 | | **JIS (Japan)** | S40C | JIS G4051 | | **GB (China)** | 45# (45钢) | GB/T 699 | | **DIN (Germany)** | 1.1158, Ck40 | DIN 17200 | *Note: AISI 1039 is functionally very similar to and often interchangeable with AISI 1040, which has an identical carbon range.* --- #### **6. Primary Applications** AISI 1039 hot-rolled rounds are used in components requiring higher strength and good wear resistance, often in the as-rolled condition or after heat treatment. * **Automotive & Transportation:** * Axle shafts and drive shafts * Gears, sprockets, and heavy-duty pinions * Crankshafts and connecting rods (for non-critical applications) * Steering linkage and suspension components * **General Machinery & Equipment:** * High-strength shafts, spindles, and pins * Bolts, studs, and fasteners (high-strength Grade 8.8 / SAE Grade 5 equivalents) * Hydraulic cylinder rods and piston rods * Machine tool components and ways * **Construction & Agricultural:** * Implement drive shafts and PTO shafts * Pivot pins, bushings, and linkage parts for heavy equipment * Bucket teeth adapters and wear parts * **Forging Stock:** An excellent billet material for closed-die forgings that will be heat-treated, such as hand tools, levers, and couplings. --- #### **7. Heat Treatment Response** AISI 1039 is readily heat-treatable and its higher carbon content makes it particularly suitable for applications requiring good wear resistance. * **Annealing:** Heat to ~790-815°C (1450-1500°F), slow cool. Improves machinability for complex parts. * **Normalizing:** Heat to ~870-925°C (1600-1700°F), air cool. Refines grain structure for more uniform properties. * **Quenching & Tempering (Through-Hardening):** * **Austenitizing:** ~830-855°C (1525-1575°F) * **Quenchant:** Oil is standard; water can be used for simple shapes to achieve maximum hardness but increases cracking risk. * **Tempering:** 425-650°C (800-1200°F) to achieve the desired balance of strength and toughness. Can achieve tensile strengths well over 800 MPa (115 ksi). * **Surface Hardening:** An ideal candidate for **induction hardening** or **flame hardening**, creating a hard, wear-resistant case. --- #### **8. Fabrication & Processing Notes** * **Machining:** Good machinability in the annealed condition. In the as-rolled condition, mill scale should be removed first. Use positive rake tools and adequate coolant. * **Welding:** **Fair** with strict procedures. Pre-heating (200-315°C / 400-600°F) is **strongly recommended**. Post-weld heat treatment (stress relief or full re-heat-treatment) is often **necessary** for critical applications. Use low-hydrogen electrodes (E7018, E8018). * **Forming:** Best suited for hot-working. Cold forming is possible but requires larger bend radii and may benefit from annealing first. * **Surface Preparation:** The mill scale must be removed by abrasive blasting, pickling, or machining prior to any finishing operation (painting, plating, precision grinding). --- #### **9. Quality & Inspection** * Material is typically supplied with a **Mill Test Report (MTR)** certifying chemical composition and mechanical properties. * Dimensional tolerances conform to standard hot-rolled bar specifications (e.g., ASTM A29). * Surface condition: Hot-rolled, with a uniform layer of iron oxide (mill scale). Surface imperfections typical of hot-rolled products may be present. --- **Disclaimer:** The information provided is typical and for reference purposes. Specific properties can vary between manufacturers, heats, and processing conditions. For critical applications, always consult the material certification, relevant standards (ASTM A29), and consider application-specific testing. AISI 1039's higher carbon content necessitates greater care during welding and forming operations compared to lower-carbon steels. -:- For detailed product information, please contact sales. -: AISI 1039 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4801 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 1039 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1039 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1039 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1039 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 1272 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