AISI 4130 Steel Sheet,Plate,

AISI 4130 Steel Sheet/Plate, Product Information -:- For detailed product information, please contact sales. -: AISI 4130 Steel Sheet/Plate, Synonyms -:- For detailed product information, please contact sales. -:

AISI 4130 Steel, Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: AISI 4130 Alloy Steel (UNS G41300)** --- #### **1. Overview** AISI 4130 is a versatile, low-alloy chromium-molybdenum (Cr-Mo) steel renowned for its excellent combination of strength, toughness, weldability, and fatigue resistance. Its relatively low carbon content compared to higher-grade alloys like 4140 provides good formability and weldability while the chromium and molybdenum additions enhance hardenability, strength, and resistance to creep and impact. It is a workhorse material in industries where high strength-to-weight ratio and reliability under dynamic loads are critical. **Key Characteristics:** * High Strength-to-Weight Ratio * Good Toughness and Impact Resistance * Excellent Weldability (with proper procedure) * Good Machinability (in annealed condition) * Responsive to Heat Treatment --- #### **2. International Standard Designations** | Standard System | Designation | | :--- | :--- | | **UNS** | G41300 | | **AISI / SAE** | 4130 | | **ASTM** | A29 (Bar), A519 (Seamless Tube) | | **Aerospace (AMS)** | AMS 6350 (Sheet/Strip), AMS 6370 (Bars) | | **Europe (EN)** | 1.7218 | 25CrMo4 | | **Germany (DIN)** | 1.7218 | 25CrMo4 | | **Japan (JIS)** | SCM430 | | **ISO** | 25CrMo4 | --- #### **3. Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Typical (%) | | :--- | :--- | :--- | :--- | | **Carbon (C)** | 0.28 | 0.33 | 0.30 | | **Manganese (Mn)** | 0.40 | 0.60 | 0.50 | | **Silicon (Si)** | 0.15 | 0.35 | 0.25 | | **Chromium (Cr)** | 0.80 | 1.10 | 0.95 | | **Molybdenum (Mo)** | 0.15 | 0.25 | 0.20 | | **Phosphorus (P)** | - | 0.035 | 0.020 | | **Sulfur (S)** | - | 0.040 | 0.025 | | **Iron (Fe)** | Balance | | | --- #### **4. Physical Properties** | Property | Metric | Imperial | | :--- | :--- | :--- | | **Density** | 7.85 g/cm³ | 0.284 lb/in³ | | **Melting Point** | ~1427-1510 °C | ~2600-2750 °F | | **Modulus of Elasticity** | 205 GPa | 29.7 x 10⁶ psi | | **Poisson's Ratio** | 0.29 | 0.29 | | **Thermal Conductivity** | 42.7 W/m·K @ 100°C | 247 BTU·in/hr·ft²·°F | | **Coefficient of Thermal Expansion** | 12.3 µm/m·°C (20-100°C) | 6.8 µin/in·°F | --- #### **5. Mechanical Properties** *Properties are highly dependent on heat treatment and section size.* **A. Normalized & Tempered Condition (Typical for many structural applications)** * **Tensile Strength:** 670 MPa (min) | 97,000 psi (min) * **Yield Strength (0.2% Offset):** 435 MPa (min) | 63,000 psi (min) * **Elongation (% in 50mm):** 25.5% (min) * **Reduction of Area:** 50% (min) * **Hardness:** 197-229 HB **B. Quenched & Tempered Condition (Higher Strength)** * **Tensile Strength:** 930 - 1080 MPa | 135,000 - 157,000 psi * **Yield Strength:** 760 MPa (min) | 110,000 psi (min) * **Elongation:** 18% (min) * **Hardness:** 28 - 32 HRC (Varies with tempering temperature) * **Impact Toughness (Charpy V-notch):** >54 J @ RT | >40 ft-lb @ RT **Hardenability (Jominy Test Band):** Available per SAE J1268 standards. Good through-hardening in sections up to ~75mm (3 inches) diameter when oil quenched. --- #### **6. Heat Treatment** * **Annealing:** Heat to 843-871°C (1550-1600°F), slow furnace cool. Hardness: ~180 HB. * **Normalizing:** Heat to 899-927°C (1650-1700°F), air cool. * **Quenching:** Austenitize at 871-899°C (1600-1650°F), **oil quench**. * **Tempering:** Temper immediately after quenching. * **For High Toughness:** 540-650°C (1000-1200°F) * **For High Strength:** 205-425°C (400-800°F) * **Note:** Rapid cooling (water or oil) from tempering temperatures above 375°C (700°F) is recommended to avoid temper embrittlement. --- #### **7. Product Forms & Key Applications** AISI 4130 is available in a wide range of forms to suit manufacturing needs. | Product Form | Typical Applications | | :--- | :--- | | **Seamless Tubing** | **Aerospace:** Aircraft engine mounts, landing gear components, hydraulic lines. **Automotive:** Roll cages, chassis tubing, drive shafts. **Industrial:** Hydraulic cylinders, high-pressure systems. | | **Round & Flat Bars** | **General Engineering:** Shafts, gears, bolts, studs, connecting rods, machinery components. **Oil & Gas:** Tool joints, valve parts. | | **Sheets & Plates** | **Aerospace:** Structural airframe components, brackets. **Defense:** Armor plating (in processed forms). | | **Forgings** | High-stress components requiring grain flow integrity (e.g., crankshafts, yoke arms). | | **Wire** | Springs, fasteners, welding wire. | --- #### **8. Fabrication & Welding** * **Machinability:** Good in annealed or normalized condition (~65% of 1212 steel). Hardness should ideally be below 280 HB for optimal machining. * **Weldability:** **Excellent for a low-alloy steel.** Requires preheating (150-260°C / 300-500°F) for thicker sections and post-weld heat treatment (PWHT) to restore toughness in the heat-affected zone (HAZ). * **Common Methods:** GTAW (TIG), GMAW (MIG), SMAW (Stick). Use compatible low-alloy filler metals (e.g., ER80S-D2, E9018-D2). * **Formability:** Good in annealed condition. Can be cold formed with appropriate tooling. --- #### **9. Why Choose AISI 4130?** * **Proven Performance:** A well-understood and reliable material with decades of service history. * **Versatility:** Can be tailored from a tough, weldable state to a high-strength state via heat treatment. * **Favorable Cost/Performance Ratio:** Offers properties superior to plain carbon steels at a reasonable cost premium. * **Wide Availability:** Readily available in numerous forms and sizes from global suppliers. **Disclaimer:** This datasheet provides typical information. For critical applications, always consult the relevant material standard, qualified engineers, and perform appropriate testing. Mechanical properties are influenced by processing history, section size, and heat treatment practices. -:- For detailed product information, please contact sales. -: AISI 4130 Steel, Specification Dimensions Size： Diameter 20-1000 mm Length <4033 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 4130 Steel, Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 4130 Steel Sheet,Plate, -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 4130 Steel Sheet,Plate, -:- For detailed product information, please contact sales. -:

Packing of AISI 4130 Steel Sheet/Plate, -:- 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 Sheet/Plate 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 504 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