AISI 1038 Steel Seamless tube

AISI 1038 Steel Seamless tube, cold drawn, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1038 Steel Seamless tube, cold drawn, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1038 Steel, cold drawn, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: AISI 1038 Steel - Cold Drawn Round Bars (19-32 mm / 0.75-1.25 in)** --- #### **1. Product Overview** AISI 1038 cold drawn round bars are medium-carbon steel products processed through cold drawing to achieve enhanced mechanical properties, improved dimensional accuracy, and superior surface finish. This grade features a slightly higher carbon content than AISI 1035, combined with elevated manganese levels, providing better hardenability and strength. The cold working process results in significant strain hardening, making this material ideal for precision components requiring high strength-to-weight ratios and reliable performance in demanding applications. The 19-32 mm (0.75-1.25 in) diameter range is particularly popular for general mechanical and automotive applications. --- #### **2. Key Characteristics & Advantages** - **Enhanced Strength Properties:** Cold working increases yield strength by 30-45% compared to hot-rolled material - **Superior Dimensional Control:** Maintains tight diameter tolerances (±0.075 mm / ±0.003 in typical) - **Excellent Surface Quality:** Produces smooth, scale-free surface (1.6-3.2 µm Ra) suitable for bearing surfaces - **Improved Hardenability:** Higher carbon and manganese content provides better response to heat treatment - **Good Machinability:** Consistent machining characteristics in cold worked condition - **Better Straightness:** Essential for rotating components and precision assemblies - **Cost-Effective Performance:** Provides high strength without alloying element costs --- #### **3. Chemical Composition** | Element | Composition Range (%) | Standard Reference | |---------|----------------------|-------------------| | **Carbon (C)** | 0.35 - 0.42 | ASTM A108 / SAE J403 | | **Manganese (Mn)** | 0.70 - 1.00 | ASTM A108 / SAE J403 | | **Phosphorus (P)** | ≤ 0.040 | ASTM A108 / SAE J403 | | **Sulfur (S)** | ≤ 0.050 | ASTM A108 / SAE J403 | | **Silicon (Si)** | 0.15 - 0.35 | ASTM A108 / SAE J403 | | **Iron (Fe)** | Balance | - | *Note: Some specifications may allow manganese up to 1.05% maximum.* --- #### **4. Typical Mechanical Properties (Cold Drawn Condition)** | Property | Value Range | Test Standard | |----------|-------------|---------------| | **Tensile Strength** | 620 - 760 MPa (90 - 110 ksi) | ASTM A370 | | **Yield Strength (0.2% offset)** | 515 - 655 MPa (75 - 95 ksi) | ASTM A370 | | **Elongation in 50 mm (2")** | 12% - 17% | ASTM A370 | | **Reduction of Area** | 35% - 45% | ASTM A370 | | **Brinell Hardness** | 197 - 255 HB | ASTM E10 | | **Surface Roughness (Ra)** | 1.6 - 3.2 µm (63 - 125 µin) | ASME B46.1 | | **Modulus of Elasticity** | 200 GPa (29,000 ksi) | ASTM E111 | | **Shear Modulus** | 80 GPa (11,600 ksi) | ASTM E143 | | **Poisson's Ratio** | 0.29 | ASTM E132 | | **Density** | 7.87 g/cm³ (0.284 lb/in³) | - | | **Machinability Rating** | ~45% (relative to 1212 steel) | - | --- #### **5. Physical & Thermal Properties** | Property | Value | |----------|-------| | **Thermal Conductivity** | 50.2 W/m·K (34.8 BTU·in/hr·ft²·°F) | | **Specific Heat Capacity** | 486 J/kg·K (0.116 BTU/lb·°F) | | **Coefficient of Thermal Expansion** | 11.3 µm/m·°C (6.3 µin/in·°F) 20-100°C | | **Electrical Resistivity** | 0.190 µΩ·m | | **Magnetic Properties** | Ferromagnetic | | **Melting Point** | 1480 - 1520°C (2696 - 2768°F) | --- #### **6. International Standard Equivalents** | Standard System | Designation | Primary Specification | |----------------|-------------|----------------------| | **UNS** | G10380 | Unified Numbering System | | **SAE/AISI** | 1038 | SAE J403 | | **ASTM** | Grade 1038 | ASTM A108 (Cold-Finished) | | **EN (Europe)** | 1.1156 (C38E) | EN 10083-2 | | **ISO** | C38E | ISO 683-18 | | **JIS (Japan)** | S38C | JIS G4051 | | **GB (China)** | 40# (40钢) | GB/T 699 | | **DIN (Germany)** | 1.1156, Ck38 | DIN 17200 | --- #### **7. Heat Treatment Response** AISI 1038 responds well to various heat treatments, with its composition providing good hardenability: **Recommended Parameters:** - **Annealing:** 790-815°C (1450-1500°F), slow cool (furnace cool preferred) - **Normalizing:** 870-925°C (1600-1700°F), air cool - **Quenching:** 830-855°C (1525-1575°F), oil quench recommended - **Tempering:** 425-650°C (800-1200°F) depending on required properties **Hardenability Data (Typical):** - Jominy distance to 50 HRC: Approximately 8-12 mm from quenched end - Maximum achievable hardness: 55-58 HRC (as-quenched) - Typical tempered hardness: 28-40 HRC depending on tempering temperature --- #### **8. Primary Applications** Cold drawn AISI 1038 rounds are specified for components requiring high strength, good wear resistance, and dimensional accuracy: **Automotive Components:** - Axle shafts and drive shafts - Transmission gears and shafts - Steering system components - Suspension linkage parts - Brake system components **Industrial Machinery:** - High-strength shafts and spindles - Gear blanks and sprockets - Hydraulic piston rods - Pump shafts and motor shafts - Machine tool components **Construction & Agricultural:** - Implement drive shafts - PTO shafts - Excavator pins and bushings - Heavy equipment components - High-strength fasteners **General Manufacturing:** - Precision pins and dowels - Tool holders and fixtures - Bearing races and sleeves - Valve stems and actuator rods - Wear-resistant components --- #### **9. Fabrication & Processing** **Machining Operations:** - Requires rigid setups and proper tooling - Recommended cutting speeds: 30-45 m/min (100-150 ft/min) - Carbide tools with positive rake angles preferred - Use cutting fluids for improved tool life and surface finish - Annealing (if needed) improves machinability for complex parts **Welding Considerations:** - Pre-heating (150-260°C/300-500°F) mandatory - Low-hydrogen electrodes (E7018, E8018) required - Post-weld heat treatment (595-650°C/1100-1200°F) strongly recommended - Limited weldability due to carbon content and cold worked structure **Forming & Bending:** - Moderate cold forming capability with proper radii - Minimum bend radius: 3 times material thickness - Hot forming recommended for complex shapes - Stress relieving advised after severe forming --- #### **10. Quality Assurance** - Certified mill test reports including chemical analysis - Mechanical property certification to ASTM A108 - Dimensional inspection per ASTM A108 Table A1.1 - Surface finish verification - Straightness tolerance: ≤0.25 mm per 300 mm (≤0.010 in per foot) - Optional NDT testing available (ultrasonic, magnetic particle) - Standard lengths: 3-6 meters (10-20 feet) --- #### **11. Storage & Handling** - Store in dry conditions to prevent corrosion - Protect surfaces from physical damage - Use proper lifting equipment - Stack on flat, level supports - Implement inventory rotation (FIFO) --- **Important Considerations:** 1. **Anisotropy:** Cold drawn bars exhibit directional properties 2. **Stress Relief:** Recommended after heavy machining or forming 3. **Heat Treatment Planning:** Consider final treatment before machining 4. **Weldability:** Limited - consider alternative joining methods 5. **Quality Verification:** Review test reports for critical applications 6. **Section Size Effects:** Properties may vary with diameter --- **Disclaimer:** This technical specification provides general information. Actual properties may vary based on manufacturer and processing. For engineering applications, consult official specifications and conduct appropriate testing. Professional engineering judgment should be applied for critical applications. -:- For detailed product information, please contact sales. -: AISI 1038 Steel, cold drawn, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4797 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 1038 Steel, cold drawn, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1038 Steel Seamless tube, cold drawn, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1038 Steel Seamless tube, cold drawn, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1038 Steel Seamless tube, cold drawn, 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 Seamless tube 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 1268 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