AISI 6150 Steel Sheet,Plate,

AISI 6150 Steel Sheet/Plate, annealed, 25 mm (1 in.) round Product Information -:- For detailed product information, please contact sales. -: AISI 6150 Steel Sheet/Plate, annealed, 25 mm (1 in.) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 6150 Steel, annealed, 25 mm (1 in.) round Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: AISI 6150 Chromium-Vanadium Alloy Steel (Annealed Condition)** ### **Product Designation** * **Standard Name:** AISI 6150 / SAE 6150 * **UNS Number:** G61500 * **Condition:** **Annealed** (Spheroidize Annealed for optimal machinability) * **Product Form:** Hot-rolled or cold-finished steel bar * **Specified Size:** **25 mm (1 inch) diameter round** ### **Overview** AISI 6150 is a versatile, medium-carbon **chromium-vanadium alloy steel** renowned for its excellent combination of high strength, good toughness, and superior fatigue resistance. Supplied in the **annealed condition**, the material offers excellent machinability and formability prior to final heat treatment. It is primarily designed for **through-hardening** (quenching and tempering) to achieve a wide range of strength and hardness levels. The addition of vanadium provides crucial grain refinement, making it a preferred choice for high-stress, high-fatigue applications such as heavy-duty shafts, springs, and gear components. ### **1. Chemical Composition (Typical % by Weight, AISI/SAE Standard)** The composition is balanced for deep hardenability, strength, and enhanced toughness via grain refinement. | Element | Content (%) | Role & Effect in AISI 6150 | | :--- | :--- | :--- | | **Carbon (C)** | 0.48 - 0.53 | Provides the fundamental capacity for high strength and hardness through martensite formation. | | **Manganese (Mn)** | 0.70 - 0.90 | Increases hardenability, ensuring uniform properties in the 1-inch cross-section. | | **Phosphorus (P)** | ≤ 0.035 | Impurity; kept low to prevent embrittlement. | | **Sulfur (S)** | ≤ 0.040 | Impurity; standard low level ensures good ductility and fatigue properties. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer and solid solution strengthener. | | **Chromium (Cr)** | 0.80 - 1.10 | Significantly enhances hardenability, wear resistance, and provides good tempering resistance. | | **Vanadium (V)** | 0.15 (min) | **Critical addition.** A potent grain refiner that inhibits grain growth during austenitizing, resulting in a finer final microstructure that **improves toughness, impact strength, and fatigue life**. | | **Iron (Fe)** | Balance | | ### **2. Physical & Mechanical Properties (Annealed Condition - 25 mm round)** **A. Physical Properties** * **Density:** 7.85 g/cm³ (0.284 lb/in³) * **Elastic Modulus (Young's Modulus):** ~205 GPa (29.7 x 10⁶ psi) * **Poisson's Ratio:** 0.29 * **Thermal Conductivity:** ~47.0 W/m·K * **Coefficient of Thermal Expansion:** 11.3 x 10⁻⁶ /K (20-100°C) * **Forging Temperature Range:** 1050 - 900°C (1920 - 1650°F) **B. Mechanical Properties (As-Annealed)** *These are typical properties for a 25 mm (1 in.) round in a spheroidize-annealed state, ready for machining.* * **Hardness (Brinell):** 187 - 229 HB * **Hardness (Rockwell):** ~90 - 97 HRB * **Tensile Strength:** 620 - 795 MPa (90 - 115 ksi) * **Yield Strength (0.2% Offset):** 415 MPa (60 ksi) min. * **Elongation (in 50 mm / 2 in.):** 22% min. * **Reduction of Area:** 40% min. * **Machinability (Compared to 1.0% C steel):** ~65% **C. Achievable Properties After Heat Treatment** *For reference: Typical properties after oil quenching and tempering of a 25 mm round.* * **Surface Hardness (As-Quenched):** Up to 60-62 HRC * **Tempered Hardness Range:** 28 - 55 HRC (widely adjustable) * **Tensile Strength (e.g., tempered at 425°C / 800°F):** ~1550-1700 MPa (225-247 ksi) * **Key Attribute:** Excellent fatigue strength and good impact resistance at high strength levels due to fine grain structure. ### **3. Product Applications** AISI 6150 is selected for demanding applications requiring a reliable, high-performance steel that can be heat-treated to precise specifications. The **annealed 25 mm round** is a standard stock form for machining components such as: * **High-Stress Shafts & Axles:** Crankshafts, camshafts, axle shafts, propeller shafts, and spindle shafts. * **Gears & Pinions:** Heavy-duty gears, pinions, and drive components in automotive and industrial gearboxes. * **Springs:** **A premier application.** Used for heavy-duty coil springs, leaf springs (particularly for railway and off-highway vehicles), and torsion bars where high elastic limit and fatigue resistance are critical. * **Tools & Parts:** Wrenches, drill collars, mandrels, and machine parts subject to high fatigue and wear. * **Agricultural & Mining Equipment:** Gears, shafts, and other high-strength components. * **Aerospace:** Landing gear components, actuator parts, and other high-strength structural applications. ### **4. International Standards & Designations** AISI 6150 has well-established equivalents in major international standards. | Standard System | Designation | Notes / Key Comparison | | :--- | :--- | :--- | | **SAE / AISI (USA)** | **SAE/AISI 6150** | The standard designation. | | **UNS (USA)** | **G61500** | Unified Numbering System. | | **ASTM (USA)** | **ASTM A322** (Grade 6150) | Standard for alloy steel bars. **ASTM A29** for general bar requirements. | | **DIN / EN (Germany/EU)** | **1.8159 (50CrV4)** | The direct and most common European equivalent, especially for spring applications. | | **BS (UK)** | **735A50 / 535A99** | Specification for chromium-vanadium steel. | | **JIS (Japan)** | **SUP10** | Japanese spring steel specification. A very close equivalent. | | **GB (China)** | **50CrVA (GB/T 3077)** | Nearly identical Chinese specification for spring and high-strength steel. | | **ISO** | **ISO 683-11: Type 9** | Falls under alloy steels for quenching and tempering. | ### **Processing & Heat Treatment Guidance (for 25 mm round)** 1. **Annealing (As-Supplied):** Full anneal at ~790-815°C (1450-1500°F), slow furnace cool. 2. **Machining:** Optimally performed in the soft, spheroidize-annealed condition (~190-220 HB). 3. **Hardening:** Austenitize at 830-860°C (1525-1580°F), **oil quench**. Adequate agitation is required for full through-hardening of a 1-inch round. 4. **Tempering:** **Mandatory immediately after quenching.** Temper between 205-650°C (400-1200°F) to achieve desired hardness and relieve stresses. For spring applications, tempering in the 425-480°C (800-900°F) range is common. ### **Summary** The **AISI 6150 steel in annealed 25 mm (1 in.) round** is a premium, readily machinable stock form of a high-performance alloy steel. Its chemical composition, led by chromium for hardenability and vanadium for toughness, is engineered for critical components. This product allows manufacturers to machine complex parts in a soft state and then apply a robust through-hardening heat treatment to achieve an exceptional balance of high strength, fatigue resistance, and impact toughness, making it a first-choice material for demanding automotive, industrial, and spring applications worldwide. -:- For detailed product information, please contact sales. -: AISI 6150 Steel, annealed, 25 mm (1 in.) round Specification Dimensions Size： Diameter 20-1000 mm Length <4138 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 6150 Steel, annealed, 25 mm (1 in.) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 6150 Steel Sheet,Plate, annealed, 25 mm (1 in.) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 6150 Steel Sheet,Plate, annealed, 25 mm (1 in.) round -:- For detailed product information, please contact sales. -:

Packing of AISI 6150 Steel Sheet/Plate, annealed, 25 mm (1 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 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 609 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