Статья High Manganese Austenitic Steels: Part One 3 min read • September, 2018 • Основы материаловедения и группы материалов › Стали • Последняя техническая проверка: 2026 Abstract High manganese austenitic steels represent a significant advancement in metallurgical engineering, offering exceptional combinations of ductility, toughness, and wear resistance. This article examines the development, composition, and characteristics of these steels, particularly focusing on Hadfield steel, which contains 11-13% manganese and 1-1.3% carbon. Historical Development Sir Robert Abbott Hadfield's 1882 discovery of manganese steel marked a breakthrough in alloy steel development. Through extensive experimentation, he established that optimal properties could be achieved with a manganese-to-carbon ratio of 10:1, specifically with 11-13% manganese and 1-1.3% carbon content. Composition and Properties High manganese austenitic steels demonstrate unique characteristics: Full austenitic microstructure at room temperature Yield strength: 345-415 MPa (as-quenched) Ultimate tensile strength: 965 MPa Elongation: 50% in 50mm Reduction of area: 40% Hardness: 190 HB (as-quenched), 500 HB (at fracture) Table 1. Standard composition ranges for austenitic manganese steel castings ASTM A128 C Mn Cr Mo Ni Si P A 1.05-1.35 Min 11 - - - Max 1.0 Max 0.07 B-1 0.9-1.05 11.5-14.0 - - - Max 1.0 Max 0.07 B-2 1.05-1.2 11.5-14.0 - - - Max 1.0 Max 0.07 B-3 1.12-1.28 11.5-14.0 - - - Max 1.0 Max 0.07 B-4 1.2-1.35 11.5-14.0 - - - Max 1.0 Max 0.07 C 1.05-1.35 11.5-14.0 1.5-2.5 - - Max 1.0 Max 0.07 D 0.7-1.3 11.5-14.0 - - 3.0-4.0 Max 1.0 Max 0.07 E-1 0.7-1.3 11.5-14.0 - 0.9-1.2 - Max 1.0 Max 0.07 E-2 1.05-1.45 11.5-14.0 - 1.8-2.1 - Max 1.0 Max 0.07 F(U91340) 1.05-1.35 6.0-8.0 - 0.9-1.2 - Max 1.0 Max 0.07 Ознакомьтесь с марками стали и данными о материалах Изучите виды стали с точки зрения состава, микроструктуры, свойств, стандартов и условий обработки. Ознакомьтесь с данными о стали Воспользуйтесь услугой «Экскурсия с гидом» › Microstructural Characteristics and Processing The material maintains a stable, single-phase austenitic structure when properly heat treated. Figure 1: Phase diagram of steel containing 13% manganese The steel requires austenitization above 1000°C followed by water quenching to dissolve carbides and produce homogeneous austenite. This process ensures carbon remains in supersaturated solid solution, crucial for optimal performance. Applications and Limitations Despite challenging machinability and relatively low initial yield strength, these steels excel in: Railway crossings Crawler treads for tractors Impact hammers High-wear environments Surface hardening through mechanical working (hammering, pressing, cold rolling, or explosion shocking) significantly improves yield strength, creating a hard surface layer while maintaining a tough core structure. Standard Specifications ASTM Standard A-128-64 defines composition ranges: Carbon: 1.0-1.4% Manganese: 10-14% (typically limited to 12-13% for economic reasons) Work hardening reaches maximum at 13% Mn in 1.15% C alloys References 1. C. S. Mahlami, X. Pan: An overview on high manganese steel casting, 71th WFC World Foundry Congress, Advanced Sustainable Foundry, 19-21 May 2014, Palacio Euskalduna Bilbao;2. Standard Specification for Steel Castings, Austenitic Manganese, ASTM Designation: A128/A128M − 93 (Reapproved 2017);3. L. Qian, X. Feng, F. Zhang: Deformed microstructure and hardness of Hadfield high manganese steel, Materials Transactions, Vol. 52, No. 8, 2011, p. 1623-1628;4. S. Alyaz: Effects of heat treatment and chemical composition on microstructure and mechanical properties of Hadfield steels, MSc thesis, Middle East Technical University, Turky, December 2003, Accessed July 2018.