ASTM A240 stainless 304h properties

Gangsteel produce and export ASTM A240 304H stainless steel plate, ASTM A240 TP304H Stainless Steel No.1 Finish Plate and we supply TP304H stainless steel stock list 2mm to 300mm at Origin China. We are the stainless material factory in China.

Jay Steel Corporation is a leading provider and exporter of Stainless Steel 304/304L/304H Strips, Sheet & Plate. We present Stainless Steel 304/304L/304H Strips, Sheet & Plate as per the necessities of our clients and ship quality products on time. The codes encompass a clause stating that commonplace grades, which contain a of 0.04% carbon, should be used at temperatures above 550°C. Therefore, grades 304 or 316, having 0.02% carbon, are not allowed for use at high temperatures. The vessel codes provide the identical allowable stress rating for “H” grades. In apply, steel mills generally be sure that the “L” grade heats meet the strength necessities of the standard grades. 304 is one of the easier austenitic stainless steels to forge, at temperatures above 925°C.

The metal needs to be chilly labored to generate higher tensile strength. For stainless-steel sections that are welded heavily, submit-weld annealing could also be needed to supply maximum corrosive resistance.

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304H stainless steel belt, SUS304H stainless steel belt, 304H stainless steel belt, 0Cr18Ni9, 304-general model; namely 18/8 stainless steel. The GB grade is 0Cr18Ni9.
Vickers hardness (HV) 370°-420° and Hardness tolerance (HV) ±20°

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a240 Type 304H widely used material.
Corrosion resistance, heat resistance, good mechanical properties, good processing performance at room temperature such as deep drawing, bending, etc., will not harden after heat treatment, can withstand general rust in the building, and can resist erosion by food processing media (but contains concentrated acid
Corrosion may occur due to high temperature and chloride components), and it can resist organic compounds, dyes and a wide variety of inorganic compounds.
ASTM A240 Stainless Steel 304H Chemical Composition



ASTM A240 Chemical Composition












Austenitic Steels










A240 Type 304L (low carbon), good resistance to nitric acid, and durable for medium temperature and concentration of sulfuric acid, widely used as liquid gas storage tanks, low temperature equipment (304N), appliances and other consumer products, kitchen equipment, hospital equipment, transportation Tools, wastewater treatment equipment.

Alloy 304 (S30400), 304L (S30403), and 304H (S30409) stainless steels are 18% chromium, 8% nickel austenitic alloys, which are the most common and commonly used alloys in the stainless steel family. Because these alloys have one or more of the following properties, they can be used in various applications.
Properties include:
STM A240 TP304H Stainless Steel Plate Physical Properties


Density (kg/m3)

Elastic Modulus (GPa)

Mean Coefficient of Thermal Expansion (m/m/0C)

Thermal Conductivity (W/m.K)

Specific Heat 0-1000C (J/kg.K)

Electrical Resistivity (n.m)




at 1000C

at 5000C












A high-alloy steel A240 304h that can resist corrosion in the air or in chemically corrosive media. It has a beautiful surface and good corrosion resistance. It does not need to undergo surface treatment such as plating, but exerts its inherent surface properties. It is used in various steels.
One kind, usually called stainless steel.
High alloy steels such as 13 chromium steel and 18-chromium nickel steel are representative of performance.
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From a metallographic point of view, because stainless steel contains chromium, a very thin chromium film is formed on the surface. This film isolates the intruding oxygen from the steel for corrosion resistance.

In order to maintain the inherent corrosion resistance of stainless steel, steel must contain more than 12% chromium
SS 304H Plate Equivalent grades









SS 304H



304, 304L, and 304H alloys are the most prone to stress corrosion cracking (SSC) among austenitic stainless steels because of their relatively low nickel content.
The conditions that cause stress corrosion cracking are: (1) the presence of halide ions (usually chloride), (2) residual tension, and (3) the temperature exceeds 120°F (49°C).
Cold deformation during alloy forming, stenting into tube sheet, welding operations, etc. can all cause stress.
Annealing and stress relief heat treatment after cold deformation can reduce stress, thus reducing the possibility of halide stress corrosion cracking.
In the environment that may cause intergranular corrosion, it is best to choose low-carbon 304L alloy when working under low-temperature annealing.


AASTM A240 Stainless Steel 304H Plate Mechanical Properties


Mechanical Properties for Stainless Steel Plates, Stainless Steel Sheet



Tensile Properties


Yield Strength (Mpa)

Tensile Strength (Mpa)

Elongation (%)










Its used to produce industrial boilers, strain valves, steam exhaust, pipelines, cooling towers, heat exchangers, flanges, and condensers. 304H chrome steel plate is also generally used within the chemical, fuel, and oil refining business. This capacity to resist excessive temperatures makes 304H stainless-steel a useful materials in theses environments. Most commonly 304H chrome steel is present in petroleum refining crops. 304 stainless-steel is low carbon chromium nickel stainless and heat resisting metal considerably superior to Type 302 in corrosion resistance. It is increasingly widespread for “dual certified” products to be stocked – particularly in plate, pipe and bar.

304h stainless steel equivalent

We also supply steel fabrication service where steel plates can go through processings like chopping , drilling, welding, milling, machining as you require. Our metal mills have fabricating staff which have 5-10 years of working experience.

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Alloy 304H is a modification of Alloy 304 in which the carbon content is controlled to a variety of 0.04-0.10 to provide improved excessive temperature power to elements uncovered to temperatures above 800°F. The term ‘corrosion resistant steel’ is used when the alloy has lower than the 12% minimum of chromium, for example within the aviation business. There are different grades and surface finishes of chrome steel, depending on where it is going to be used. Stainless steels have a better resistance to oxidation and corrosion in many pure and man-made environments; nonetheless, it is very important choose the right sort of stainless-steel for the use. There are over a hundred and fifty grades of stainless steel, of which fifteen are probably the most used. The austenitic stainless steels are warmth treated to take away the effects of cold forming or to dissolve precipitated chromium carbides.

What are the 5 types of stainless steel?

There are a number of grades to choose from, but all stainless steels can be divided into five basic categories:Austenitic.
Precipitation hardening.

Fusion welding efficiency for type 304 stainless-steel is excellent both with and without fillers. Recommended filler rods and electrodes for stainless steel 304 is grade 308 chrome steel.

304h vs 304

Dual licensed product is deliberately meant to fulfill requirements for both commonplace and “L” grades, however cannot be utilized in purposes for “H” grade. If an software requires an “H” grade, this should be specified at time of order. Standard grades can often be used instead of “H” grades as long as their carbon contents meet the “H” limits (typically 0.04-0.10%).

Which is stronger 18 8 or 316 stainless steel?

The 316 stainless steels have 2-3% molybdenum added while the 18-8 series stainless steels do not. While it has comparable strength characteristics, 316 and 316L stainless steel have a higher degree of corrosion resistance due to the addition of the element molybdenum.

ASTM A240 TP304H Stainless Steel Perforated Sheet

The alloys are used extensively in gear and utensils for processing and dealing with of food, beverages, and dairy merchandise. Heat exchangers, piping, tanks, and other process tools in contact with fresh water additionally utilize these alloys. Alloy 304 is the standard alloy since AOD know-how has made decrease carbon levels extra easily attainable and economical. Each alloy represents an excellent combination of corrosion resistance and fabricability.

304 vs 304h

  • Applicable grades are mostly 304H and 316H, however high carbon versions of 309, 310, 321, 347 and 348 are laid out in ASTM A240/A240M. These grades are vulnerable to sensitisation if held within the temperature vary of oC.
  • “H” grades are higher carbon versions of normal grades and have elevated strength, particularly at elevated temperatures .
  • Type 304 and Type 304L have very related chemical and mechanical properties and are often included on a single material test certificate when the precise properties of a stainless-steel plate meet the standards of each varieties.
  • Once sensitised, impaired aqueous corrosion resistance and a few discount in ambient temperature ductility and toughness will outcome .

The model with guaranteed excessive carbon, 304H, could also be required for elevated temperature service, such as strain vessels. Grade 304 contains 18% chromium, which makes it immune to many corrosive environments. It is austenitic in structure due to the 8% nickel it accommodates. The very powerful and ductile austenitic structure gives grade 304 wonderful formability and fabrication characteristics. The 18 to 19 p.c of chromium which these alloys contain offers resistance to oxidizing environments corresponding to dilute nitric acid, as illustrated by information for Alloy 304 below. 304 and 304L usually has the -grade certification, particularly sheet, tubing, and spherical bar. All the chemical contents and mechanical properties meet the usual specification of 304 and 304L.

ASTM A240 TP304H Stainless Steel Cold Rolled Plates

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304h chemical composition

This mixture of properties is the reason for the extensive use of those alloys which symbolize almost one half of the entire U.S. stainless steel manufacturing. The 18-8 stainless steels, principally Alloys 304, 304L, and 304H, are available in a variety of product forms including sheet, strip, and plate. The alloys are covered by a variety A240 SS304H Stainless factory of specifications and codes referring to, or regulating, building or use of equipment manufactured from these alloys for particular circumstances. Food and beverage, sanitary, cryogenic, and stress-containing functions are examples. Alloy 304L is used for welded merchandise which may be uncovered to situations which may trigger intergranular corrosion in service.

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Gangsteel mainly products are 304h Square tube,304h stainless,304h Rectangular tube,304h seamless pipes,304h seamless tubes,304h welded pipes,304h angle bar,304h H Beam,304h channel beam,304h round bar ,304h cutting part,304h machine part,304H CNC cutting parts,304H water jet cutting parts,304H laser cutting parts and stainless steel 304h. If you have requirement, please contact us by email

ASTM A240 304h vs 304l stainless steel
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