1.4307 material
Gangsteel produce ASTM A240 304 Stainless steel plates, S30400, A240 Type 304 Stainless steel cutting parts by water cutting, laser cutting and cnc cutting. ASTM a240 (chromium and chromium nickel stainless steel plate, sheet, and strip for pressure essels and general applications. a240 304 stainless steel is a common material in stainless steel with a density of 7.93g/cm3, which is also called 18 / 8 stainless steel in the industry. High temperature resistant 800 ��, with good processing performance and high toughness, it is widely used in industry, furniture decoration industry and food and medical industry.
06cr19ni10 and SUS304 are the common marking methods on the market, among which 06cr19ni10 generally refers to national standard production, 304 generally refers to ASTM standard production, and SUS 304 refers to Japanese standard production.
304 is a kind of universal stainless steel, which is widely used to make equipment and parts with good comprehensive performance (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 18% chromium and more than 8% nickel. The stainless steel is produced according to ASTM 304.
Type 304L Stainless Steel is preferred in welding applications to exclude the formation of chromium carbides during cooling within the warmth affected region of the weld. These alloys symbolize an excellent combination of corrosion resistance and fabricability.
ss304 specification
The more extremely lowering environments corresponding to boiling dilute hydrochloric and sulfuric acids are shown to be too aggressive for these materials. Type 304 Stainless Steel is the most broadly A240-304 stainless steel plates used of the austenitic (chromium/nickel) stainless steels. In the annealed situation it’s basically non-magnetic and becomes slightly magnetic with the applying of cold work.
For a short time frame, for example throughout cooking of meals in chrome steel dishes, Core 304L/4307 can tolerate even relatively excessive chloride concentrations. The presence of corrosion inhibiting or accelerating compounds like transition steel ions or natural compounds could affect the corrosion behavior of Core 304L/4307. The most common Austenitic grade is Type 304/304L. All other grades are developed from the 18-eight base by adding alloying components to provide special corrosion-resistance, improved properties or better weldability. Type 304/304L makes up over 60% of all the stainless steel made in world at present.
The dissolution of 236 carbides and the precipitation of 2B borides are associated with the modifications of grain boundary hardening in this B-bearing 304 austenitic stainless steel between 750 and 1100°C. The non-equilibrium boron segregation enhances the grain boundary hardening when the ageing temperature is above 900°C. Core 304L/4307 has wonderful corrosion resistance in options of many halogen-free organic and inorganic compounds over a large temperature and concentration vary.
- Such steels are “sensitized” and subject to intergranular corrosion when exposed to aggressive environments.
- Exposure of the 18-8 austenitic stainless steels to temperatures in the 800°F to 1500°F (427° to 816°C) range might cause precipitation of chromium carbides in grain boundaries.
- The carbon content of Types 302, 304 and 305 could allow sensitization to occur from thermal situations experienced by autogenous welds are warmth-affected zones of welds.
Product standard a240 304 stainless steel:For a240 304 stainless steel, the Ni element in its composition is very important, which directly determines the corrosion resistance of 304 stainless steel and its value.The most important elements in 304 are Ni and Cr, but they are not limited to these two elements. Specific requirements are specified by product standards. It is considered that 304 stainless steel can be considered as long as Ni content is more than 8% and Cr content is more than 18%. This is why the industry will call this kind of stainless steel 18 / 8 stainless steel. In fact, the relevant product standards have very clear provisions for 304, and these product standards have some differences for different shapes of stainless steel. Here are some common product standards and tests.
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stainless steel 304 cost per kg
Each alloy represents a wonderful combination of corrosion resistance and fabricability. This combination of properties is the reason for the intensive use of these alloys which characterize almost one half of the total U.S. chrome steel manufacturing. Type 304 represents the most important volume adopted by Type 304L. Types 302 and 305 are utilized in smaller portions. These alloys are lined by quite a lot of development or use of kit manufactured from these alloys for specific circumstances. Food and beverage, sanitary, cryogenic, and pressure-containing functions are examples. Past customers of Type 302 are typically now using Type 304 since AOD expertise has made decrease carbon levels extra easily attainable and economical.
sa 479 gr 304
The Chrome combines with the carbon of the heat affected zone and precipitates as chromium carbide on the grain boundaries. As a outcome, it considerably reduces corrosion resistance of steel in this zone. As 304L steel has decrease carbon content, the risks of chrome carbide precipitation are a lot minimized. Type 304/304L is the modern model of “18-8” chrome steel containing roughly 18% chromium and 8% nickel and is essentially the most commonly specified stainless-steel used all through the world. Type 304/304L is a flexible, general objective stainless-steel with good resistance to atmospheric corrosion, and to many chemical substances and meals and drinks. These grades could be specified within the annealed situation the place they’ve excellent formability.
stainless aisi 304
The results of different nitric acid concentrations have been in contrast to provide understanding on in applicability in boiling and high nitric acid concentrations. Exposure of the 18-eight austenitic stainless steels to temperatures within the 800°F to 1500°F (427° to 816°C) range could trigger precipitation of chromium carbides in grain boundaries. Such steels are “sensitized” and topic to intergranular corrosion when uncovered to aggressive environments. The carbon content of Types 302, 304 and 305 might permit sensitization to occur from thermal circumstances experienced by autogenous welds are warmth-affected zones of welds. For this cause, the low carbon Type 304L alloy is most popular for purposes during which the fabric is put into service in the as-welded condition. Low carbon content extends the time essential to precipitate a harmful degree of chromium carbides, however does not eliminate the precipitation reaction for materials held for lengthy instances in the precipitation temperature range. The Types 302, 304, 304L and 305 austenitic stainless steels provide helpful resistance to corrosion on a variety of moderately oxidizing to moderately lowering environments.
|
Product Type |
A 240 304 Sheet, A 240 304 Plate |
|
SS 304 ASTM Standard Specification |
ASTM A240 / ASME SA240 |
|
Thickness |
0.1 to 3000 mm Thk |
|
Width |
10-2500mm |
|
Length |
2m, 2.44m, 3m, or as required |
|
Finish |
2B, 2D, BA NO (8), Cold rolled sheet (CR), Hot rolled plate (HR), SATIN (Met with Plastic Coated), No.1 finish hot rolled, 1D, 2B, No.4, BA, 8K, satin, hairline, brush, mirror etc. |
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Hardness |
Half Hard, Soft, Hard, Quarter Hard, Spring Hard |
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Form |
Sheet, Plate, Strip, Flats, Clad Plate, Coils, Foils, Plain Sheet, Flat Shim, Flat Sheet, Shim Sheet, Rolling Sheet, Rolling Plate, Rolls, Blank (Circle), soft annealed, descaled, tread plate, sheared, annealed, Checker Plate |
A240 304 Stainless Application scope
System description: A240 304 stainless steel is the most widely used chromium-nickel stainless steel. As a widely used steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; it has good hot workability such as stamping and bending.
, No heat treatment hardening phenomenon (use temperature -196℃～800℃).
Corrosion resistant in the atmosphere, if it is an industrial atmosphere or heavily polluted areas, it needs to be cleaned in time to avoid corrosion.
It is suitable for food processing, storage and transportation.
Has good processing properties and weldability.
Plate heat exchangers, bellows, household products (category 1, 2 tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs), auto parts (windshield wipers, mufflers, molded products), medical appliances, building materials, chemicals, food industry
, Agriculture, ship parts, etc.
304 stainless steel is a nationally recognized food grade stainless steel.
A 240 Gr 304 Mechanical Properties
| Grade |
ASME SA240 304 Mechanical Strength |
||||
|
Yield |
Tensile |
Elongation |
Hardness, max |
||
|
ASME SA240 304 |
Min Mpa |
Mpa |
Min % |
Brinell |
Rockwell B |
|
205 |
515 |
40% |
201 |
92 |
|
|
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|
|
|
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A 240 Gr 304 Chemical Composition
| Plate Grade |
The Element Maximum (%) |
||||||
|
C |
Mn |
P |
S |
Si |
Cr |
Ni |
|
|
ASME SA240 304 |
0.08 |
2.00 |
0.045 |
0.030 |
0.75 |
18.0-20.0 |
8.0-10.5 |
|
Mo |
N |
Cu |
|
|
|
|
|
|
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0.10 |
|
|
|
|
|
|
For a240 304 stainless steel, the Ni element in its composition is very important, which directly determines the corrosion resistance and value of 304 stainless steel.
The most important elements in 304 are Ni and Cr, but they are not limited to these two elements.
Specific requirements are stipulated by product standards.
The common judgment in the industry is that as long as the Ni content is greater than 8% and the Cr content is greater than 18%, it can be considered as 304 stainless steel.
This is why the industry calls this type of stainless steel 18/8 stainless steel.
In fact, the relevant product standards have very clear regulations on 304, and these product standards have some differences for different shapes of stainless steel.
Below are some common product standards and tests.
ASTM A240 Equivalent AISI 304 stainless steel sheet
|
a 240 gr |
JIS G4304 |
ASTM |
UNS |
KS |
EN 10095 |
AS |
CNS |
|
a 240 gr 201 |
SUS201 |
201 |
S20100 |
STS201 |
1.4372 |
201-2 |
201 |
|
a 240 gr 202 |
SUS202 |
202 |
S20200 |
STS202 |
1.4373 |
– |
202 |
|
a 240 gr 301 |
SUS301 |
301 |
S30100 |
STS301 |
1.4319 |
301 |
301 |
|
a 240 gr 304 |
SUS304 |
304 |
S30400 |
STS304 |
1.4301 |
304 |
304 |
|
a 240 gr 304L |
SUS304L |
304L |
S30403 |
STS304L |
1.4306 |
304L |
304L |
|
a 240 gr 304N |
SUS304N1 |
304N |
S30451 |
STS304N1 |
1.4315 |
304N1 |
304N1 |
|
a 240 gr XM21 |
SUS304N2 |
XM21 |
S30452 |
STS304N2 |
– |
304N2 |
304N2 |
|
a 240 gr 304LN |
SUS304LN |
304LN |
S30453 |
STS304LN |
– |
304LN |
304LN |
A240 304 stainless steel plate property requirement.
Tensile strength σb (MPa)≥515-1035
Conditional yield strength σ0.2 (MPa)≥205
Elongation δ5 (%)≥40
Reduction of area ψ (%)≥?
Hardness: ≤201HBW; ≤92HRB; ≤210HV
Density (20℃, g/cm³): 7.93
Melting point (℃): 1398~1454
Specific heat capacity (0~100℃, KJ·kg-1K-1): 0.50
ASTM / AISI/ SAE, DIN, Werkstoff grades or equivalents:
|
ASTM |
BS 970 1991 |
AISI / SAE |
Werkstoff |
|
A240 SS 304L |
304S11 |
304L |
1.4306 |
|
A240 SS 304 |
304S15 |
304 |
1.4301 |
|
A240 SS 316L |
316S11 |
316L |
1.4404 |
|
A240 SS 316L |
316S13 |
316L |
1.4435 |
|
A240 SS 316 |
316S31 |
316 |
1.4401 |
|
A240 SS 316 |
316S33 |
316 |
1.4436 |
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Stress corrosion cracking of austenitic stainless-steel serviced in aggressive surroundings often happens in energy, petrochemical trade, and leads to premature equipment failure and nice economic loss. This paper focuses on the problem of the SCC on the 304L stainless steel nozzle of a hydrogenation reactor, which is brought on due to on-line alkali cleaning. Susceptibility for SCC was evaluated by Slow Strain Rate Test for as-rolled and sensitized 304L stainless steel in low focus sodium hydroxide solution with excessive temperature. The effects of different pressure charges, completely different concentration of sodium hydroxide and completely different solution temperatures on SCC have been investigated.
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In order to determine whether a material is 304 stainless steel, it must meet the requirements of each element in the product standard. As long as one does not meet the requirements, it cannot be called 304 stainless steel. Gangsteel produce A240 304 Stainless steel plate, if you have requirement for stainless steel plate, please feel free to contact us by admin@gangsteel.com