Comparing 06Cr19Ni10 and 304: Which Is Superior?

1. Which is better, 06Cr19Ni10 or 304?

06Cr19Ni10 and 304 are commonly used stainless steel materials. In terms of application, there are only minor differences between the two.

However, if there are specific requirements for material implementation standards, it’s important to note that 06Cr19Ni10 is a national standard material brand while 304 is an American standard material brand, with different corresponding implementation standards.

For reference, here are the similarities and differences between 06Cr19Ni10 and 304:

2. Differences between 06Cr19Ni10 and 304

  1. Different Standards: 06Cr19Ni10 is a national standard stainless steel grade, while 304 is an American standard stainless steel grade.
  2. Chemical Composition: There are minor differences in the chemical composition of 06Cr19Ni10 and 304, with slight variations in the required content of individual elements such as chromium and sulfur (refer to Table 1).
  3. UNS Codes: 06Cr19Ni10 has the UNS code S30408, while 304 has the UNS code S30400.

3. The same points of 06Cr19Ni10 and 304

  1. 18-8 Alloys: 06Cr19Ni10 and 304 are both 18-8 alloys, meaning they have a metallurgical structure that allows them to be used in most corrosive environments and resist medium oxidation (and weak reduction) environments.
  2. Wide Application: 06Cr19Ni10 and 304 are both widely used in various industries, including food, fresh water, household products, and industrial products.
  3. Density: The density of 06Cr19Ni10 and 304 is 7.93g/cm3.
  4. Mechanical Properties: The mechanical properties of 06Cr19Ni10 and 304 are nearly identical (refer to Table 2).
  5. Carbon Content: 06Cr19Ni10 and 304 both have a carbon content of about 0.08%.
  6. Welding Performance: When in a welding state, their performance is not as strong as their corresponding low carbon counterparts (022Cr19Ni10 and 304L, respectively).

Table 1: Chemical Composition Differences between 06Cr19Ni10 and 304

UNS number codeBrandCarbonManganeseP PhosphorusSulfurSiliconChromiumNickel
S3040806Cr19Ni100.082.000.0350.0150.7518.0-20.08.0-10.5
S304003040.072.000.0450.030.7517.5-19.58.0-10.5

Note:

  • 1. This table is a comparison of the two components, and the data is derived from the national standard GB/T24511-2017; American standard ASTM A240M-15a;
  • 2. The data unit is percentage, i.e. “%”;
  • 3. Except for the indicated range, the components listed in this table are the maximum values.

Table 2: Differences between 06Cr19Ni10 and 304 mechanical properties

BrandSpecified plastic extension strength Rpo. 2/MPaSpecified plastic extension strength RP1.0/MPaTensile strength Rm/MPaElongation after fracture A%Hardness value
HBWHRBHV
Not less thanNot more than
06Cr19Ni10220250.5204020192210

Data source: GB/T24511-2017 Stainless and Heat Resisting Steel Plates and Strips for Pressure Equipment

304 Stainless Steel Mechanical Test Requirements

BrandYield StrengthTensileStrengthElongation in 2 in or 50mm. min.% elongationHardness, max
MpaMpaBrinell.HBWRockwell
3042055154020192 HRBW

Data Source: ASTM A240/A240-15a Specification for Chromium and Chromium Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and General Applications.

The difference between 06Cr19Ni10 and 304 lies in the implementation standards and chemical composition. Both 06Cr19Ni10 and 304 can be referred to as “304 stainless steel” in a broad sense, but in a narrow sense, 06Cr19Ni10 is not exactly the same as 304.

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Shane
Author

Shane

Founder of MachineMFG

As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.

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