What is the Difference between 301 and 304 Stainless Steel? How do they stack up against one another?

Introduction

Stainless steel grade 301 is usually supplied in the form of strips and wires, with a tensile strength of up to 1800 Mpa, to produce tempers ranging from 1/16 Hard to Full Hard. By subjecting grade 301 to controlled analysis it is capable of retaining sufficient ductility even in ½ hard conditions. This form of grade 301 may be used in aircraft, rail car components and architectural structures. Tempers of this grade, ranging from ¾ to full hard, may be used in applications requiring high wear resistance and spring features with simple form designs.

Grade 301L, which is the low carbon form of grade 301, is the ideal choice for applications that require good ductility. Grade 301LN is another variant. This contains a higher percentage of nitrogen and exhibits a higher work harden rate compared to standard 301. Only grade 301 is specified in ASTM A666. 301L and 301LN are represented by other conventions. Grade 301L is represented by JIS G4305 and 301LN by EN10088-2 as grade 1.4318.

Applications

Some of the typical applications of grade 301 stainless steels are listed below:

• Making rail car structural components
• Air frame sections
• Highway trailer components
• Automotive wheel covers
• Wiper blade clips and holders
• Stove element clips
• Screen frames
• Toaster springs
• Curtain walls
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