2021年1月12日 · Both A2 and A4 grades are classed as Austenitic stainless steel (sometimes called the 300 series). This means that they have high chemical resistance but cannot be hardened by heat treatment. They can be hardened by cold working. Both A2 and A4 stainless steels are mostly non-magnetic.

一般来说，A4 级不锈钢螺丝往往更容易制造、清洁、抛光和焊接。 这是因为 A4 的化学性质与 A2 不同。 此外，高合金含量使其比 304 级不锈钢更贵。 但是，考虑到更大的图片，这些螺丝是一项投资。 在更长的时间内，许多买家认为它们是比 304 级更具成本效益的解决方案，仅仅是因为他们缺乏其他必要的要求，例如 A2 级紧固件，例如维护或更换，尤其是当它们在外面使用时。 A4 材料的使用被认为在耐点蚀的环境或什至包含腐蚀性溶液的环境中至关重要，因为该材料具有 …

2023年1月20日 · Also known as Grade 304 or 18/8, A4 70 stainless steel is austenitic steel composed of 18% chromium and 8% nickel. This type of steel is corrosion-resistant, has good formability characteristics, and is easy to clean. It also has excellent weldability, which makes it ideal for fabrications that require welding.

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SAE 316L grade stainless steel, sometimes referred to as A4 stainless steel or marine grade stainless steel, is the second most common austenitic stainless steel after 304/A2 stainless steel. Its primary alloying constituents after iron , are chromium (between 16–18%), nickel (10–12%) and molybdenum (2–3%), up to 2% manganese , [ 1 ] with ...

A2和A4的化学成分不同（A2-70和A2-50都是A2组别，化学成分一样；A4-50和A4-70都是A4组别，化学成分一样），化学成分如下所示，摘自国家标准GB/T 3098.6-2014。 2、机械性能不同. A2，A4后面的数字70，50表示的是性能等级，不同性能等级的A2和A4机械性能不同（A2-70和A4-70性能等级都是70，机械性能一样；A2-50和A4-50性能等级都是50，机械性能一样，），具体性能参数如下，摘自国家标准GB/T 3098.6-2014。 3、加工方式不同. 不同性能等级的奥氏体钢 …

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2024年11月29日 · Among the various grades of stainless steel, A4-70 and 316 are particularly notable for their durability in harsh environments. The "A4" classification means it’s suitable for marine environments, and "70" indicates a high tensile strength of 700 MPa.

2024年7月16日 · A4 stainless steel is also known as grade 316 or 18/10 stainless. Once again, this latter nomenclature refers to its chemical composition, which contains 18% chromium and 10% nickel. The crucial difference is that, in addition to a higher level of nickel, A4 stainless steel also contains 2% molybdenum.

There’s a number of exceptional types of stainless steel with A2 and A4 being the most popular. Types 301, 303, 309, 312, 317, 321 and 410 all offer very distinct properties, including temperature resistance, affordability, corrosion resistance and ductility.