ASTM A240 304h stainless steel tube

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

Grade 304 accommodates 18% chromium, which makes it resistant to many corrosive environments. It is austenitic in construction because of the eight% nickel it accommodates. The very tough and ductile austenitic structure offers grade 304 wonderful formability and fabrication characteristics. If thickness greater than 6.35 mm is known as a SA 240 kind 304 Plate. Working temperatures of 1652–2102°F (750–1150°C) are really helpful for many sizzling working processes.

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  • ASME SA240 commonplace specification for chromium and chromium-nickel stainless steel plate, sheet, and strip for strain vessels and for common functions.
  • Type 304 and Type 304L have very related chemical and mechanical properties and are sometimes included on a single material take a look at certificate when the precise properties of a steel plate meet the standards of both sorts.
  • Type 304L also has a barely decrease yield and power than Type 304.
  • Type 304L is a variation of Type 304 and has a lower carbon content which improves weldability and lowers the risk of lowered corrosion resistance across the weld.

The Modulus of Elasticity of 304H chrome steel is 200 GPa (29.0 x 106 psi). The Melting Range of 304H stainless-steel is 1398–1421 °C (2550–2590 °F). 304H stainless steel has excellent resistance to drinks, meals, atmospheric corrosion and also to many inorganic chemical compounds and natural A240 SS304H Stainless factory chemicals. So the 304 Stainless Steel Sheet Price is decrease compared to other grades of stainless steels and all metallic products in general. There are different variations of the material with low carbon and high carbon content material.

ASTM A240 TP304H Stainless Steel 2B Finish Plate

Possible Alternative GradesPossible alternative grades to grade 304 stainless steels are given in desk 5. They are highly applied within the manufacturing of warmth exchangers and chemical process vessels, tankers, or storage. They are most well-liked to use for the conveyor belts because of their easy availability and value-friendly nature.

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The SS UNS S30403 Shim Sheets are stronger and are used as interim supplies to affix two completely different elements. There are different finishes such because the 304L SS Chequered Plate which may be customized produced. The SS Werkstoff No 1.4306 Perforated Sheet allows for mild weight and powerful applications.

304h stainless steel fittings

The 18 to 19 percent of chromium which these alloys contain provides resistance to oxidizing environments similar to dilute nitric acid, as illustrated by data for Alloy 304 under. Alloys 304 , 304L , and 304H stainless steels are variations of the 18 p.c chromium – 8 p.c nickel austenitic alloy, essentially the most familiar and most frequently used alloy in the stainless-steel family. Grade 304 is often used for meals equipment, where cleansing for the removal of bacteria is important. The cleanability of 304 stainless steel is superior to many other supplies.

What does ASTM mean?

The letters “ASTM” used to stand for the American Society for and Materials.

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The nickel current within the alloy offers resistance to reasonably lowering solutions such as pure phosphoric acid, regardless of the focus, in chilly solutions and up to 10% diluted hot solutions. The alloy also can operate successfully in caustic options free of chlorides or fluorides at reasonable temperatures. Alloy 304/304H has good resistance to atmospheric corrosion, meals and beverages and to many organic and inorganic chemical compounds in moderately oxidizing to reasonably lowering environments. The excessive chromium content material of the alloy supplies resistance to oxidizing options similar to nitric acid as much as fifty five% weight and up to 176°F (80°C).

What does l mean in stainless steel?

The L indicates low carbon grades. The “L” grade material helps reduce the possibility of carbide precipitation forming during processes such as welding.

To present material at the most effective level of corrosion resistance, low carbon materials should be used for material put in service within the welded condition. Alternately, full annealing dissolves the chromium carbide and restores a high degree of corrosion resistance to the usual carbon content material supplies. The 18-eight alloys have been used very efficiently in fresh waters containing low ranges of chloride ion. Generally, 100 ppm chloride is considered to be the limit for the 18-8 alloys, notably if crevices are present. Higher ranges of chloride may trigger crevice corrosion and pitting. For the more severe situations of upper chloride levels, lower pH, and/or larger temperatures, alloys with greater molybdenum content corresponding to Alloy 316 must be thought of. The 18-8 alloys are not beneficial for publicity to marine environments.


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)











304L stainless steel is in very massive demand as it can be used in severely corrosive situations. Weld annealing is required for 304L chrome steel, only when there may be excessive stress load. The Chemical Composition of ASTM A240 grade 304L is P Max 0.045, Mn Max 2, C Max 0.03, S Max 0.03, Cr 18 – 20, Si Max 1 and Ni eight – 12. The Ultimate Tensile Strength of ASTM A240 grade 304L is 564 MPa .

ASTM A240 Type 304H Mirror Plates

304h angle bar

blast, Brush, etching, and so forth Finish Hot rolled plate , Cold rolled sheet , 2B, 2D, BA NO, SATIN Form Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank , Ring and so forth. The specification of the sheets is the A240 for stress vessel and excessive temperature applications.

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Gangsteel mainly products are 304h 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 Type 304H 20 mm Thick Stainless Steel Plate
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