AISI 1042 Steel, Hot Rolled,UNS G10420

AISI 1042 Steel, Hot Rolled Bar (UNS G10420) Product Information -:- For detailed product information, please contact sales. -: AISI 1042 Steel, Hot Rolled Bar (UNS G10420) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1042 Steel, Hot Rolled Bar (UNS G10420) Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: AISI 1042 Steel - Hot Rolled Bar (UNS G10420)** --- #### **1. Material Overview** AISI 1042 (UNS G10420) is a medium-carbon, non-alloy steel supplied in the hot-rolled condition, characterized by a balanced carbon-manganese composition that provides good tensile strength, moderate hardenability, and favorable machining characteristics. As a member of the 10xx series standard carbon steels, it offers reliable performance for general engineering applications requiring strength and durability at economical cost. The hot-rolled condition provides dimensional versatility with characteristic mill scale surface, making it suitable for further processing through machining, heat treatment, or forming operations. --- #### **2. Key Characteristics** - **Balanced Strength Properties:** Optimal carbon content provides good tensile strength with reasonable ductility - **Good Machinability:** Can be machined effectively in as-rolled or annealed condition - **Heat Treatable:** Responsive to quenching and tempering for enhanced properties - **Cost-Effective:** Economical production method with wide availability - **Versatile Fabrication:** Suitable for various manufacturing processes with proper techniques --- #### **3. Chemical Composition** | Element | Composition Range (%) | Standard Reference | |---------|----------------------|-------------------| | **Carbon (C)** | 0.40 - 0.47 | SAE J403, ASTM A29 | | **Manganese (Mn)** | 0.60 - 0.90 | SAE J403, ASTM A29 | | **Phosphorus (P)** | ≤ 0.040 | SAE J403, ASTM A29 | | **Sulfur (S)** | ≤ 0.050 | SAE J403, ASTM A29 | | **Silicon (Si)** | 0.15 - 0.35 | SAE J403, ASTM A29 | | **Iron (Fe)** | Balance | - | *Note: Some specifications may allow manganese up to 1.00% depending on application requirements.* --- #### **4. Typical Mechanical Properties (Hot-Rolled Condition)** | Property | Value Range | Test Standard | |----------|-------------|---------------| | **Tensile Strength** | 570 - 700 MPa (83 - 102 ksi) | ASTM A370 | | **Yield Strength (0.2% offset)** | 415 - 525 MPa (60 - 76 ksi) | ASTM A370 | | **Elongation in 2" (50 mm)** | 16% - 20% | ASTM A370 | | **Reduction of Area** | 40% - 50% | ASTM A370 | | **Brinell Hardness** | 170 - 217 HB | ASTM E10 | | **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 | | **Machinability Rating** | ~50% (relative to 1212 steel) | - | --- #### **5. Physical & Thermal Properties** | Property | Value | |----------|-------| | **Density** | 7.87 g/cm³ (0.284 lb/in³) | | **Melting Point** | 1460 - 1510°C (2660 - 2750°F) | | **Thermal Conductivity** | 49.2 W/m·K (34.1 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** | 0.210 µΩ·m | --- #### **6. International Standard Equivalents** | Standard System | Designation | Comparable Specification | |----------------|-------------|--------------------------| | **UNS** | G10420 | Unified Numbering System | | **SAE/AISI** | 1042 | SAE J403 | | **ASTM** | Grade 1042 | ASTM A29, A576 | | **EN (Europe)** | 1.1191 (C42E) | EN 10083-2 | | **ISO** | C42E | ISO 683-18 | | **JIS (Japan)** | S40C (Similar) | JIS G4051 | | **GB (China)** | 45# (45钢) | GB/T 699 | | **DIN (Germany)** | 1.1191, Ck42 | DIN 17200 | --- #### **7. Heat Treatment Response** **Recommended Parameters:** - **Annealing:** 790-815°C (1450-1500°F), slow cool - **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) based on required properties **Typical Heat-Treated Properties:** - **Quenched & Tempered:** Tensile strength 850-1100 MPa, Hardness 28-40 HRC - **Surface Hardening:** Suitable for induction or flame hardening (50-55 HRC achievable) - **Maximum As-Quenched Hardness:** 58-62 HRC --- #### **8. Primary Applications** **Automotive & Transportation:** - Axle shafts and drive components - Transmission gears and shafts - Steering system parts - Suspension components - Crankshafts (medium-duty) **Industrial Machinery:** - General purpose shafts and spindles - Gear blanks and sprockets - Hydraulic cylinder components - Machine tool parts - Fastener stock **Construction & Mining:** - Excavator pins and bushings - Drill rods and tooling - Wear plates and liners - Structural components **Agricultural Equipment:** - Implement shafts - Tractor transmission parts - PTO components - Plow and cultivator parts **General Manufacturing:** - Die blocks and tooling - Press components - Forging stock - Tool holders and fixtures --- #### **9. Fabrication & Processing** **Machining:** - Good machinability in annealed condition - Recommended cutting speeds: 25-40 m/min (80-130 ft/min) - Carbide or high-speed steel tools with proper geometry - Cutting fluids improve tool life and surface finish - Mill scale removal recommended before precision machining **Welding:** - Pre-heating (150-260°C/300-500°F) required for thicknesses >6 mm - Low-hydrogen electrodes (E7018, E8018) recommended - Post-weld heat treatment (595-650°C/1100-1200°F) advised - Controlled cooling to prevent cracking **Forming:** - Good hot working characteristics - Moderate cold forming capability - Minimum bend radius: 2 times thickness - Annealing improves formability for complex shapes --- #### **10. Quality & Inspection** - Standard mill test reports available (chemical analysis, mechanical properties) - Dimensional tolerances per ASTM A29 for hot-rolled bars - Surface inspection for seams, laps, and rolling defects - Optional non-destructive testing (ultrasonic, magnetic particle) - Hardness testing per order requirements --- #### **11. Storage & Handling** - Store in dry conditions to prevent excessive corrosion - Stack on level supports to prevent bending - Handle with appropriate equipment to prevent surface damage - Protect from weather elements during outdoor storage - Regular inspection for surface condition maintenance --- **Important Considerations:** 1. Mill scale must be removed for most finishing operations 2. Proper heat treatment essential for optimal performance 3. Welding requires careful procedure control 4. Machinability improves with annealing 5. Consider normalized condition for applications requiring uniform properties 6. Section size affects hardenability and mechanical properties --- **Disclaimer:** This technical data sheet provides general information about AISI 1042 hot-rolled steel. Actual properties may vary based on manufacturer, processing parameters, and specific production conditions. For engineering applications, consult official material specifications and conduct appropriate testing. Professional engineering judgment should be applied for specific applications requiring precise performance characteristics. -:- For detailed product information, please contact sales. -: AISI 1042 Steel, Hot Rolled Bar (UNS G10420) Specification Dimensions Size： Diameter 20-1000 mm Length <4802 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 1042 Steel, Hot Rolled Bar (UNS G10420) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1042 Steel, Hot Rolled Bar (UNS G10420) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1042 Steel, Hot Rolled Bar (UNS G10420) -:- For detailed product information, please contact sales. -:

Packing of AISI 1042 Steel, Hot Rolled Bar (UNS G10420) -:- 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 1273 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