具沃斯田體晶體結構的高錳鋼，其材料特性為高延性、高韌性、高加工硬化能力及優良的耐磨性，於重工業機械領域是一重要的工程材料。本研究針對CNS 3830 規範中的兩種含鉻高錳鋼，SCMnH11及SCMnH21，進行拉伸、硬度和衝擊的機械性質試驗，觀察顯微結構的特徵，以探討機械性質與顯微結構間互動機制。
機械性質試驗結果的數據顯示所研究的含鉻高錳鋼均符合標準規範有關機械性質的要求。並發現到此鋼種具有非常高的應變硬化指數，n = 1，這導致塑性變形時其硬度會大幅度的增加。於拉伸試驗與衝擊試驗後的試片中，觀察到機械雙晶的存在，而ε麻田散體只存在於高應變速率的衝擊斷裂區。相較於德製高錳鋼，所研究的高錳鋼於晶界處出現富鉻析出物，而於晶粒內呈現出凝固枝晶的痕跡。

Austenitic Manganese Steels with a face-centered cubic crystal structure is an important material used in heavy machinery, characterized with high ductility, high toughness, high work hardening and excellent wear resistance. In this research, two chromium bearing Austenitic Manganese Steels, grade SCMnH11 and SCMnH21 of CNS 3830 standard, were investigated by testing of tensile, hardness and Charpy impact, and examining of micro-structures to study the relationship between mechanical properties and structural characteristic.
The testing results show that the mechanical properties of investigated steels have conformed to the requirements of CNS Standard. In tensile testing, it shows a very high value of strain-hardening exponent, n = 1, which resulting the increasing of hardness. Structures of mechanical twin were observed in tested specimens of tensile and impact ones, however, the ε-Martensite tend to exists only in the material zone fractured in high strain rate. Comparing to a specimen sampled from a hammer parts made of Deutsches, the investigated steels showed that chromium-rich particles precipitated along grain boundaries and dendritic traces exists within grains.

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