ASTM A240 stainless steel 304h

aisi 304h

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

“L” grades practically at all times comply with the usual grade requirements, however this should be investigated on each event. The common designations of austenitic grades of stainless steel, similar to grades 304 and 316, embrace sub-grades – L and H variants used for specific purposes. abs grade ah36 shipbuilding and offshore industries steel Has been committed to the of export steel trade more than 10 years. Our service includes all kinds of steel product , including uncooked supplies and processed completed merchandise. Gangsteelis specialised in supplyingASTM A240 metal plate inA H . Our gangsteel have min 600Tons stock measurement for every dimension chrome steel.

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All the chrome steel grades 304, 304L, and 304H are chemically compounded with the elements like chromium, phosphorus, silicon, manganese, carbon, sulphur, molybdenum, and nickel. Besides other elements chromium, molybdenum, and nickel are the major contributors in the entire composition. Hence, it displays tremendous yield in addition to tensile strengths, great resistance, and elongation vary. In basic, all three grades are being elongated via the maximum limit of forty%. Also, they have the highest melting level at 1400 levels Celsius except for the 304H. Grade 304H has a melting range from 2550 to 2590 degrees Fahrenheit. Alloy 304 is the standard alloy since AOD technology has made lower carbon levels more simply attainable and economical.

304H CNC cutting parts

Such steels are “sensitized” and topic to intergranular corrosion when uncovered to aggressive environments. The carbon content material of Alloy 304 could permit sensitization to happen from thermal circumstances skilled by autogenous welds and heat-affected zones of welds.

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  • 304 grades have glorious low temperature properties and respond nicely to hardening by cold working.
  • 304 and 304L stainless-steel plates are part of the austenitic household of chrome steel and they’re some of the versatile and broadly used sorts of stainless plate.
  • 304 SS plates have glorious corrosion resistance in a variety of different media.
  • They are a comparatively low cost stainless product and used in quite a lot of purposes.

Grade 304 is often used for meals tools, where cleaning for the elimination of bacteria is significant. The cleanability of 304 stainless-steel is superior to many other materials. Austenitic stainless steels are inherently robust, maintaining the ductile fracture mode and excessive absorbed energy in impression tests to cryogenic temperatures (-200°C).


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)

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 (%)










Grade 304 is very demanded within the fields of food processing and dealing with industries as they’re anti-corrosive in addition to excessive-temperature adapters. These sheets and plates are being used diversely in the architectural and constructional business for its high pressure and stress absorbance qualities. 304H has a higher energy underneath excessive temperature, due to this fact it’s often applied A240 SS304H Stainless factory in the structural and strain-bearing use above 500℃ or even 800℃. It doesn’t cause any issues to high temperature use, but it will reduce corrosion resistance to aqueous answer. Alloys 304, 304L, and 304H are additionally immune to reasonably aggressive natural acids such as acetic and reducing acids similar to phosphoric.

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Typical brief time tensile property data for low and elevated temperatures are shown below. At temperatures of one thousand°F (538°C) or higher, creep and stress rupture turn out to be concerns. 304HN Aircraft and Aerospace elements, marine elements, excessive temperature parts, strain vessels, pump elements, welded tubing, cast fittings, pipe flanges, and valves. Grade 304 just isn’t usually used in seawater, because of the probability of crevice corrosion growing underneath sediments, precipitation and biofouling.

ASTM A240 TP304H Stainless Steel Perforated Sheet

The low carbon “L” grades are used where high temperature publicity will occur, including welding of medium or heavy sections. The low carbon is a technique of delaying or preventing grain boundary carbide precipitation which can lead to intergranular corrosion in corrosive service environments. As shown within the time-temperature-sensitisation curve , there may be an incubation time before the precipitation of carbides at temperatures within the range of about oC.

304h stainless steel plate

What does ASTM a240 mean?

304 and 304L ASTM A240 stainless steel plate is a standard 18-8 material – it contains 18% chromium and 8% nickel. 304 Stainless steel plate is one of the most versatile stainless steel materials available. It has excellent forming and welding characteristics.

Hot off the presses from the world of stainless steel and manufacturing. Yes, 304H stainless steel may be polished to a wide variety of finishes. Grades 304 and 304L have the same composition limits for all components except carbon. However, neither grade 304 nor grade 304L is specified to have minimum carbon content. If any requirement for stainless plate in competitive value and quicker supply time, please contact us. Weld metal with a completely austenitic construction is more susceptible to cracking through the welding operation. For this cause, Alloys 304 and 304L are designed to resolidify with a quantity of ferrite to attenuate cracking susceptibility.

The time for precipitation to occur is extremely dependent upon the amount of carbon present in the metal, so low carbon content will increase resistance to this downside. Because of their software area the “L” grades are most available in plate and pipe, however often also in round bar. In the absence of heavy section welding, or of excessive temperature publicity, the corrosion resistances of the usual and “L” grades are usually identical. Low carbon or “L” grades are used to forestall or delay sensitisation of stainless steel at elevated temperatures and the ensuing decrease corrosion resistance.

304h stainless

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ASTM A240 TP304H Stainless Steel Designer Sheet

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 cutting parts and stainless steel 304h. If you have requirement, please contact us by email

ASTM A240 304h vs 304