202 304

sa 240 type 304

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.

Both 304 and 316 stainless steels are austenitic, once they cool, the iron remains in the type of austenite , a section of iron which is nonmagnetic. The completely different phases of cast-iron correspond to totally different crystal structures. In other alloys of steel, this high-temperature phase of iron transforms to a magnetic part when the steel cools. The presence of nickel within the stainless steel alloys stabilizes austenite against this section transition because the alloy cools to room temperature. This corresponds to a considerably bigger magnetic susceptibility than we would anticipate for different nonmagnetic materials, but remains to be nicely beneath what may be considered magnetic. As both 316 and 304 stainless steels are austenitic, once they cool, the iron stays within the type of austenite , a section of iron which is nonmagnetic.

hardness of ss 304

  • 304 is almost for certain to turn out to be magnetic after chilly work similar to urgent, blasting, slicing, etc.
  • However, 300 series stainless is non-magnetic only after it is freshly shaped.
  • All stainless steel is magnetic besides austenitic stainless-steel which is actually 300 sequence stainless similar to 304 and 316.
  • Initially the chilly work causes the stainless to choose up overseas particles corresponding to free iron.

Some austenitic stainless-steel grades, significantly 304, are to some degree interested in a magnet when chilly labored, eg by bending, forming, drawing or rolling. Magnetically soft steels are used in electrical purposes involving changing electromagnetic induction. Solenoids and relays are typical examples, and where these parts also need to have corrosion resistance a ferritic stainless steel can be a good choice. For important purposes specialist ferritic bar grades are available with guaranteed magnetic properties.

sa240 304

is type 304 stainless steel magnetic

Austenitic grades are probably the most generally used stainless steels accounting for more than 70% of manufacturing . Stainless metal just isn’t a single alloy, however quite the name applies to a bunch of iron-primarily based alloys containing a minimum of 10.5% chromium. Other parts are added and the chromium content increased to enhance the corrosion resistance and heat-resisting properties, improve mechanical properties, and / or enhance fabricating characteristics. There are over 50 stainless-metal grades that had been initially recognized by the American Iron and Steel Institute (AISI.) Three general classifications are used to identify stainless-steel. Among alloy types, “304” is the fundamental chromium-nickel austenitic stainless-steel and has been discovered appropriate for a wide range of functions.

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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If the temperature is not excessive sufficient the corrosion resistance of the stainless shall be reduced. The passivation process washes away free particles and types a passive coating on the stainless floor. It is a comparatively economic method to enhance corrosion resistance, however it is not meant to fully restore non-magnetic property. Duplex stainless steels hold comparatively high chromium ranges (between 18 and 28%) and moderate quantities of nickel (between 4.5 and eight%).

A240 304L Stainless steel plates

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.

Hardness

Half Hard, Soft, Hard, Quarter Hard, Spring Hard

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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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

 

 

 

 

 

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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Since stainless-steel is an alloy of iron when the metal does corrode it is within the type of rust. There can be “Pitting Corrosion” which is usually brought A240-304 stainless steel plates on by acid chloride. As the chromium is dissolved chlorides bore into the stainless making a clean wall pit. When molybdenum is added to the chrome steel the pitting corrosion resistance improves.

Nevertheless stainless-steel connectors are employed in conditions with ECR poses a lower design criteria and corrosion resistance is required, for instance in high temperatures and oxidizing environments . There are a number of households of stainless steels with different bodily properties. The magnetic properties of stainless steel are very dependent on the weather added into the alloy. A primary chrome steel has a ‘ferritic’ construction and is magnetic, fashioned from the addition of chromium – it may be hardened via the addition of carbon, making it ‘martensitic’. However, the most common stainless steels are ‘austenitic’ – these have a higher chromium content and nickel can also be added. It is the nickel which modifies the physical construction of the steel and makes it theoretically non-magnetic. When Stainless Steel is chosen for its resistance to corrosion it is very important use the proper type or grade.

The similar is true where the die cuts the stainless rising the likelihood that rust will finally happen there. All stainless-steel is magnetic besides austenitic chrome steel which is definitely 300 sequence stainless such as 304 and 316. However, 300 sequence stainless is non-magnetic solely after it’s freshly fashioned. 304 is nearly for certain to turn into magnetic after cold work similar to urgent, blasting, slicing, and so forth.

Any course of which might change the crystal structure of chrome steel may cause austenite to be transformed to the ferromagnetic martensite or ferrite forms of iron. It can also be attainable for austenite to spontaneously convert to martensite at low temperatures. To complicate matters additional, the magnetic properties of these alloys depend on the alloy composition. Within the allowed ranges of variation of Ni and Cr, important differences in magnetic properties may be noticed for a given alloy. An enhance of chromium content improves the corrosion resistance of chrome steel.

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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

is type 304 stainless steel magnetic
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