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Differences Between 65Mn Steel and Stainless Steel

As a company specializing in steel tape measures and the sale of both stainless steel and manganese steel strips, we often encounter customers who are unsure about the differences between these two types of steel. Here is a concise comparison focusing on several key aspects: oxidation resistance, strength, cost, machinability, wear resistance, heat resistance, magnetism, and environmental adaptability.

Oxidation/Corrosion Resistance

Stainless steel has superior corrosion and oxidation resistance due to the presence of chromium, which forms a protective oxide layer[3][4]. 65Mn steel, being a carbon steel, is more prone to rust and corrosion, especially in humid environments[2].

Strength

65Mn steel is known for its exceptional tensile strength (980 MPa) and hardness (38-42 HRC), making it ideal for durable and resilient springs[1][2][4]. Stainless steel, while strong, generally has lower tensile strength and hardness compared to 65Mn steel[4].

Cost

65Mn steel is typically more cost-effective than stainless steel due to its simpler composition and manufacturing process[1].

Machinability

65Mn steel is easier to machine than most stainless steels, which can be challenging due to their higher work-hardening rates[4].

Wear Resistance

The high hardness of 65Mn steel provides superior wear resistance compared to many stainless steel grades[1][4].

Heat Resistance

Stainless steels generally maintain their strength at higher temperatures better than 65Mn steel[4].

Magnetism

65Mn steel is magnetic, whereas austenitic stainless steels (e.g., 304, 316) are non-magnetic[4].

Environmental Adaptability

Stainless steel’s corrosion resistance makes it suitable for harsh environments, while 65Mn steel is better for applications where corrosion is not a major concern[1][2][3][4].

65Mn steel excels in strength, wear resistance, and cost-effectiveness, making it ideal for steel tape measures, steel strips, and steel blades. Stainless steel offers superior corrosion and heat resistance, making it better for use in corrosive or high-temperature environments.

Citations:
[1] [Fanghua Steel: What is 65Mn Carbon Steel](https://www.fanghuasteel.com/news/what-is-65mn-carbon-steel/)
[2] [WixSteel: 65Mn Spring Steel Wire](https://www.wixsteel.com/products/alloy-steel-bar/spring-steel-wire/65mn)
[3] [CompraCo: High Carbon Spring Steel Properties](https://compraco.com.br/en/blogs/especificacoes-do-aco/propriedades-de-aco-de-mola-de-alto-carbono-de-aco-grau-65mn-especificacao-equivalente)
[4] [CortenSteels: 65Mn Spring Steel](https://www.cortensteels.com/news/65mn-spring-steel-60690615.html)
[5] [Virgamet: 65Mn Spring Steel Specifications](https://virgamet.com/65g-65mn4-66mn4-56mn4-1-1240-spring-steel)
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Stainless Steel Strip

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