AISI 1566 Steel Tube,Pipe,UNS G15660

AISI 1566 Steel Tube Composition Spec (UNS G15660) Product Information -:- For detailed product information, please contact sales. -: AISI 1566 Steel Tube Composition Spec (UNS G15660) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1566 Steel Composition Spec (UNS G15660) Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 1566 / UNS G15660 Extra High Manganese Carbon Steel** **1. Overview** AISI 1566 (UNS G15660) is an extra high-manganese, high-carbon steel grade designed for applications demanding the highest level of strength, hardness, and wear resistance within the standard carbon-manganese steel family. It represents the upper end of the "15xx" series, with its significantly elevated manganese (Mn) content (typically 1.45-1.75%) providing exceptional hardenability. This allows even very large and thick cross-sections to be uniformly hardened to a high degree, achieving remarkable surface hardness and excellent core strength. It is a premium choice for the most demanding industrial components subject to severe abrasion, rolling contact fatigue, and heavy impact. **2. Chemical Composition (Weight %)** The standard chemical composition is defined as follows: | Element | Minimum (%) | Maximum (%) | | :------ | :---------- | :---------- | | Carbon (C) | 0.60 | 0.71 | | Manganese (Mn) | 1.45 | 1.75 | | Phosphorus (P) | - | 0.040 | | Sulfur (S) | - | 0.050 | | Silicon (Si) | 0.15 | 0.30 | | Iron (Fe) | Balance | Balance | *(Note: Minor residual elements may be present within allowable limits. Lower sulfur and phosphorus levels are often specified for premium quality forgings.)* **3. Physical & Mechanical Properties (Typical, Annealed or As-Rolled Condition)** Properties in the as-rolled or annealed state are provided for reference, but AISI 1566 is almost always used in a heat-treated condition. * **Density:** 7.85 g/cm³ (0.284 lb/in³) * **Melting Point:** ~1415-1450°C (2580-2640°F) * **Modulus of Elasticity:** 200-210 GPa (29-30 x 10⁶ psi) * **Poisson's Ratio:** 0.29 * **Thermal Conductivity:** ~46 W/m·K (at 100°C) - Slightly lower than lower-alloy steels due to high Mn content. * **Machinability:** ~45% (compared to 100% for AISI 1212). Machining is challenging and is best performed in the annealed or normalized condition using appropriate tools and techniques. **Mechanical Properties (Heat Treated - Quenched & Tempered)** When properly quenched and tempered, AISI 1566 achieves outstanding mechanical properties, especially in heavy sections. * **Tensile Strength:** 900 - 1150+ MPa (130 - 167+ ksi) * **Yield Strength (0.2% Offset):** 700 - 950+ MPa (102 - 138+ ksi) * **Elongation (in 50mm):** 12% - 18% * **Reduction in Area:** 35% - 45% * **Hardness:** 269 - 341 HB (Approx. 28 - 37 HRC), can be raised to over 50 HRC with specific quenching and lower tempering temperatures. * **Impact Toughness (Charpy V-notch):** Good, but highly dependent on tempering temperature. Higher tempering yields better toughness. **4. Product Applications** AISI 1566 is specified for the most critical, high-stress, and wear-intensive components, particularly where large section sizes are involved. * **Heavy-Duty Gearing:** Large industrial gears, pinions, and gear shafts in mining, cement, and power generation equipment where high tooth strength and wear resistance are paramount. * **Railroad & Transportation:** High-integrity railroad wheels, axles, heavy-duty couplers, and traction motor shafts. * **Construction & Mining Equipment:** Critical forged components such as track links for heavy excavators, bucket teeth adapters, crusher jaws (smaller sizes), roller pins, and drive shafts for large machinery. * **Oil & Gas Industry:** Large-diameter shafts, mandrels, and other heavily loaded components in drilling and pumping equipment. * **Forgings & Machinery:** High-strength forgings requiring deep and uniform hardening, such as large bolts, hydraulic cylinder rods for heavy presses, and rolls for rolling mills. **5. International Standards & Cross-References** AISI 1566 / UNS G15660 is recognized under several international standards. | Standard | Designation | Remarks | | :------- | :---------- | :------ | | **UNS** | G15660 | Unified Numbering System. | | **ASTM** | A510 (Grade 1566) | Standard Specification for General Requirements for Wire Rods and Coarse Round Wire. Also referenced in some bar specifications. | | **SAE / AMS** | SAE J403 (1566) | SAE Standard Chemical Composition. | | **FED / QQ** | QQ-S-635 (Class 4) | May be referenced for applicable bar stock. | | **DIN (Germany)** | ~1.0901 / 38Mn7 | The closest European equivalent, though compositions may vary slightly. | | **JIS (Japan)** | ~SB 56, SMn 2 | Japanese standards with similar high Mn-C characteristics. | | **BS (UK)** | ~080A67, 150M36 | British standards with comparable hardenability but different Mn ranges. | *(Critical Note: While these grades are often used interchangeably based on hardenability, precise chemical limits can differ. For replacement or qualification, a direct compositional and mechanical property comparison is essential.)* **6. Heat Treatment** AISI 1566 requires careful heat treatment to unlock its full potential and manage distortion due to its high hardenability. * **Annealing:** Full annealing (heating to 830-860°C / 1525-1580°F and slow cooling) is performed to soften the steel for machining. * **Normalizing:** Used to refine the grain structure after forging. * **Quenching & Tempering (Q&T):** This is the standard hardening process. * **Austenitizing:** 815-845°C (1500-1555°F) * **Quenching:** Typically in oil for most sections to minimize distortion and cracking risk; water or polymer quenches may be used for the largest sections to achieve maximum hardness. * **Tempering:** Immediately after quenching. Temperatures range from 425-650°C (800-1200°F), balancing the final hardness, strength, and toughness requirements. **Conclusion** AISI 1566 (UNS G15660) is a premium-grade, deep-hardening carbon-manganese steel engineered for maximum performance in the most challenging environments. Its exceptionally high manganese content grants it superior hardenability, making it the material of choice for large, heavy-section components that must withstand extreme wear, high contact stresses, and significant impact loads. It is a cornerstone material in heavy industry, mining, and transportation sectors. -:- For detailed product information, please contact sales. -: AISI 1566 Steel Composition Spec (UNS G15660) Specification Dimensions Size： Diameter 20-1000 mm Length <5053 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 1566 Steel Composition Spec (UNS G15660) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1566 Steel Tube Composition Spec (UNS G15660) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1566 Steel Tube Composition Spec (UNS G15660) -:- For detailed product information, please contact sales. -:

Packing of AISI 1566 Steel Tube Composition Spec (UNS G15660) -:- 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 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 1524 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