perbedaan stainless steel 304 dan 316
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.
There are a number of differences in mechanical properties between 316 and 316L stainless-steel plate. The minimal tensile strength of 316L stainless steel plate is 70 ksi. 316L chrome steel has an elongation of 40%, a hardness of 217 on the Brinell scale and a ninety five on the Rockwell B scale.
The fatigue energy or endurance limit is the maximum stress beneath which material is unlikely to fail in 10 million cycles in air environment. For austenitic stainless steels as a bunch, the fatigue energy is usually about 35 % of the tensile power.
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.
The molybdenum offers 316 higher general corrosion resistant properties than Grade 304, significantly higher resistance to pitting and crevice corrosion in chloride environments. In ASTM A240, sort 316 and 316L is a chromium nickel austenitic metal, Element molybdenum addition can enhances corrosion resistance of stainless-steel, which is the principle factor that 316/316l is more corrosion resistant than 304/304l. When 316L steel of low carbon content material is only somewhat greater than 316 metal on strength degree. Another distinction, 316l can be used for weld therapy as it contains lower carbon.
aisi 304 standard
304 stainless-steel is the commonest type of stainless-steel used all over the world, largely due to its glorious corrosion resistance and worth. It accommodates between 16 and 24 percent chromium and up to 35 p.c nickel, in addition to small amounts of carbon and manganese.
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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Both Alloys 316 and 317L are susceptible to precipitation of chromium carbides in grain boundaries when uncovered to temperatures in the 800 to 1500°F (427 to 816°C) vary. Such “sensitized” steels are topic to intergranular corrosion when uncovered to aggressive environments. Where brief intervals of publicity are encountered, nonetheless, similar to in welding, Alloy 317L with its larger chromium and molybdenum content, is extra proof against intergranular assault than Alloy 316 for applications the place gentle gauge material is to be welded. Heavier cross sections over 7/16 inch (eleven.1 mm) usually require annealing even when Alloy 317L is used.
304ss
- It is instantly brake or roll fashioned into quite a lot of parts for purposes in the industrial, architectural, and transportation fields.
- 316/316L plate is an effective choice for marine purposes due to a good atmospheric corrosion resistance.
- 316 chrome steel plate has wonderful forming and welding characteristics.
- Grade 316 chrome steel plate is the usual molybdenum-bearing grade of chrome steel plate.
- The molybdenum offers 316 chrome steel plate better overall corrosion resistant properties than grade 304 chrome steel plate.
- It has particularly higher resistance to pitting and crevice corrosion in chloride environments.
304 metal
At temperatures as high as a hundred and twenty°F (38°C), both types have excellent resistance to larger concentrations. Service tests are usually desirable as working situations and acid contaminants could considerably have an effect on corrosion rate. Where condensation of sulfur-bearing gases occurs, these alloys are much more resistant than different kinds of stainless steels.
The major distinction between 304 vs 316 chrome steel is the composition and corrosion resistance, SS304 doesn’t contain molybdenum whereas SS316 contains 2-3% molybdenum. The addition of molybdenum provides pitting resistance in phosphoric acid, acetic acid and dilute chloride options and provides corrosion resistance in sulfurous acid. In addition, AISI 304 has a 18% Chromium and eight% Nickel content whereas AISI 316 has a 16% Chromium and 10% Nickel. The relationship between 316, 316L and 316H is the same as that between the 304 series of stainless steels. Only the carbon contents differentiate 316, 316L and 316H grades . Specifications for another products, notably tube and pipe, have a carbon restrict of 0.035% or 0.040% most for 304L and 316L, however are otherwise the same.
|
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 |
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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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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 |
|
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|
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|
|
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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Because of their application area the “L” grades are most readily available in plate and pipe, however typically also in round bar. In the absence of heavy part welding, or of excessive temperature publicity, the corrosion resistances of the usual and “L” grades are normally equivalent A240-304 stainless steel plates. Low carbon or “L” grades are used to forestall or delay sensitisation of chrome steel at elevated temperatures and the resulting lower corrosion resistance. The problematic temperature zone is oC, encountered throughout welding or particular software environments.
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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