ASTM A240 304h stainless temperature

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

304H Stainless Steel Coil is also used throughout the facility technology industry. The stainless steel plates provide hardening properties that make cold working likable.

The corrosion conduct of Cr-1Mo steel with numerous coatings was investigated in a simulated, medium-BTU, coal gasifier setting at 600 °C. Aluminized coatings have been discovered to be unsuitable to be used in coal gasifier atmospheres because they skilled severe cracking and internal sulfidation-oxidation. Chromized coatings with more than 30 wt.% Cr and a coating thickness of a hundred and twenty μm offered acceptable corrosion resistance. However, further improvement in scale adherence is crucial for long-time period service.

It is an austenitic, corrosion metal with excellent energy, toughness, fabrication traits and weldability. The low carbon model, 304L, may be required for full corrosion resistance when thicker sections are welded. The 304H version has a assured minimal carbon content material, which ensures good energy at high A240 SS304H Stainless factory temperatures. Chromium and aluminum were concurrently co-deposited by diffusion into austenitic chrome steel substrates, by a single-step, pack-cementation process. The mechanism for the formation of diffusion-coated merchandise on 304 and 316 stainless steels and on Incoloy 800 is discussed.

304h stainless steel round bar

304h stainless steel fittings

The short term (∼100 h) oxidation behaviour of the 9%Cr metal P91 was studied at 650 °C in N2–O2–H2O gas mixtures containing a comparatively low oxygen level of 1%. The oxidation kinetics were measured thermogravimetrically and the oxide scale development mechanisms had been studied using H218O-tracer with subsequent analyses of oxide scale composition and tracer distribution by MCs+-SIMS depth profiling.

  • The oxidation behaviour of high‐temperature Ni‐based alloys in steam has received comparatively little attention, but the broad vary of alloying additions thought-about, in comparison with austenitic steels, has the potential to contribute in numerous ways to the dimensions morphologies and oxidation behaviour.
  • An scanning electron microscopy outfitted with an energy dispersive spectrometer was employed to characterize the morphology and cross-part of specimens reduce from experimental tubes.
  • High temperature corrosion conduct of austenitic heat-resistant steel Super 304H/ 10Cr18Ni9Cu3NbN in simulated and real combustion gasoline circumstances was investigated in this paper.
  • Understanding the interplay among compositional and microstructural requirements for strengthening and oxidation resistance, and their affect on the rate and mode of scale evolution is key to the best utility of these alloys.
  • Underlying these pursuits is the apparently important contribution to oxide growth in steam from inward transport of oxidant species that probably involve hydrogen.

The carbide precipitation just isn’t dangerous to excessive temperature mechanical properties. After welding Alloy 304/304H it might be essential to anneal the plate to restore the corrosion resistance misplaced by sensitization to intergranular corrosion when chromium carbides precipitate in the grain boundaries in the weld heat-affected zone.


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









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 (%)










Even though pack aluminide coated steels are being commercially used, there has not been any systematic investigation of the elements that management the coating formation. The present investigation has been carried out to outline the boundary situations beneath which diffusion in the strong section decide the coating kinetics. The effect of pack exercise and temperature on the construction and kinetics of aluminde layer formation on EN-3 steel has been investigated. The coating characteristics were evaluated by metallography, EPMA, X-ray diffraction, and scanning electron microscope . Oxidation resistance of the coated samples have been compared to that of 304 stainless-steel after heating in air at 900C for seventy two h. The surface aluminum composition was found to be about 20% by weight which remained fixed with time in the temperature vary of 750C–900C.

ASTM A240 TP304H Steel Plate

The accuracy of the mannequin was verified by the microstructure and properties of the joints fabricated by CDFW of 304 chrome steel. provides high-high quality stainless steel, particular steel, nickel alloys and titanium worldwide. We do this for varied prospects in the machining business, mechanical engineering, chemical, offshore and aerospace industries. Steelinox is the proper partner if your materials necessities are excessive. For imperial weight calculations of ss sheet and ss plate sure measurements must be converted to decimal inches.

ASTM A240 TP304H Stainless Steel Shim Plate

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When it’s applied to intermittent use under 870°C, and steady use below 925°C, there remains good antioxidation. If the follow-up corrosion in aqueous options is essential, it is not suggested to make use of 304 chrome steel repeatedly at °C. 304L stainless steel is immune to carbide precipitation, which could possibly be utilized to this range of temperature. Low thermal conductivity of austenitic alloys results in heat concentrating on the cutting edges. This means coolants and lubricants are necessary and have to be utilized in giant quantities. Fabrication of all stainless steels must be done solely with instruments dedicated to stainless-steel materials.

The adherent spinel scales are thinner and more sturdy than non-shot peened tubes of the same alloy. Most of the improved oxidation resistance may be attributed to the presence of a spinel oxide layer combined with a continuous chromia layer fashioned near the steam-touched surfaces. The presence of a steady chromia layer significantly reduces the outward diffusion of iron and minimizes the formation of iron-primarily based scales that exfoliate. This work confirmed that a uniform chilly-employee layer along the tube ID has a profound effect on oxidation resistance. Incomplete protection permits oxidation to proceed within the non-hardened areas at a rate comparable to the oxidation fee on unpeened Type 304H.

304h stainless steel mechanical properties

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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

304h cutting part
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