Grade 304H Stainless Steel (UNS S30409)

Benefits of using 304H Stainless Steel

Benefits of using Grade 304H stainless steel include:

Higher carbon content gives the material greater heat resistant qualities
Higher tensile yield strength
Greater short and long term creep strength

Applications of 304H Stainless Steel

304H stainless steel is commonly found in the oil refining, gas and chemical industry and is used in industrial boilers, pressure vessels, heat exchangers, pipelines and condensers. The material is also used throughout the power generation industry.

Chemical Composition of Grade 304H Stainless Steel

The chemical composition of Grade 304H Stainless Steel is provided in the table below.

UNS NO	Grade	C	Si	Mn	P	S	Cr	Mo	Ni	N
S30409	304H	0.04/0.10	0.75	2.00	0.045	0.030	18.00/20.00	-	8.00/10.50	0.10

Mechanical Properties of Grade 304H Stainless Steel

The mechanical properties of Grade 304H Stainless Steel are provided in the table below.

UNS No	Grade	Proof Stress 0.2% (MPa)	Tensile Strength (MPa)	Elongation A5(%)	Hardness Max
					HB	HRB
S30409	304H	205	515	40	201	92

This information has been sourced, reviewed and adapted from materials provided by Masteel UK Ltd.

For more information on this source, please visit Masteel UK Ltd

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Comments

Shaik Shamsheer says:

February 26, 2015 at 2:44 AM

IS THERE ANY ALTERNATE MATERIAL FOR 304H as same properties such as for corresive resistance and high temperature resistance

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- Paul Murphy says:
  
  February 26, 2015 at 10:21 AM
  
  Hi Shaik,
  
  The nearest possible equivalent would be EN 10088-2 X5CrNi18-10.
  
  Hope this helps.
  
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  Reply
Islam Soliman says:

December 25, 2016 at 2:13 PM

Can I weld 304h by 308 or 308l?

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Reply
prasanna ramaswamy says:

February 17, 2019 at 11:17 PM

what is the poisson's ratio of 304h ?

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- cheng chun-der says:
  
  March 12, 2019 at 12:10 AM
  
  Carbon content of SUS304H is 0.04~0.1%. If its carbon content is 0.06%, how can you assure that the stainless steel is 304H but not 304? Because the carbon content of SUS304 is 0.03~0.08%.
  
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Kamal Afzal says:

December 6, 2020 at 2:18 AM

can we use 304 as an alternative grade for 304H in hi temperature applications?

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- Noorman2008 says:
  
  December 17, 2020 at 9:01 AM
  
  Hi Kamal,
  
  I don't think so, depends of course on the temperature you are talking about.
  304H, with a higher carbon content than 304 is especially made for higher temperatures.
  See for example:
  http://www.sino-alloy.com/blog/distinguish-304-304h-304l.html#:~:text=Among%20the%20three%2C%20304H%20has,causes%20the%20price%20to%20vary.
  
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