ISO 4498:2010规定了烧结金属材料（不包括硬质合金）的硬度测试方法。 程序1确定整个材料的表观硬度。 程序1 适用于未经过任何热处理的烧结金属材料，或以硬度在表面以下至少5mm深度基本均匀的方式进行热处理的烧结金属材料， 适用于表面以下5mm深度处硬度不均匀的烧结金属材料表面， 因此适用于其中基本上通过碳或通过碳和氮的表面富集(例如通过渗碳、碳氮共渗、氮碳共渗或硫化)获得硬度的材料，并且 适用于感应硬化的材料。 步骤2测定金属相的显微硬度。 程序2 适用于各类烧结金属材料， 特别是用于确定外壳的硬度分布？根据ISO 4507中描述的方法硬化或碳氮化材料，以及 也适用于任何经过电沉积电镀、化学涂覆、化学气相沉积(CVD)、物理气相沉积(PVD)、激光、离子轰击等表面处理的烧结金属材料。为了测定处理表面的显微硬度，应用程序2。

ISO 4498:2010 specifies methods of hardness testing of sintered metal materials, excluding hardmetals. Procedure 1 determines the apparent hardness of the whole material. Procedure 1

• applies to sintered metal materials which have either not been subjected to any heat treatment, or which have been heat treated in such a way that the hardness is essentially uniform to a depth of at least 5 mm below the surface,
• applies to the surfaces of sintered metal materials which have been treated in such a way that the hardness is not uniform in the section to a depth of 5 mm below the surface,
• therefore applies to materials in which the hardness is obtained essentially by surface enrichment by carbon, or by carbon and nitrogen (for example, by carburizing, carbonitriding, nitrocarburizing or sulphidizing), and
• applies to materials which have been induction hardened.

Procedure 2 determines the microhardness of the metal phase. Procedure 2

• applies to all types of sintered metal materials,
• is used, in particular, to determine the hardness profile of case？hardened or carbonitrided materials in accordance with the method described in ISO 4507, and

also applies to any sintered metallic materials which have been subjected to surface treatments such as electrodeposited plating, chemical coating, chemical vapour deposition (CVD), physical vapour deposition (PVD), laser, ion bombardment, etc. To determine the microhardness of treated surfaces, Procedure 2 applies.