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Steel sheet /plate stainless steel sheet/plate 304/ 304L/ 304H
304 304L 304H belongs to austenitic stainless steel, it is the most widely used in the 300 series materials. On the whole, the 304 304L 304H has very similar characteristics, the only difference lies in the level of carbon content, so there will be a little difference more or less in the application filed, but the overall application is the same.
304L has lower carbon content and better corrosion resistance. But 304 of the strength is higher than 304L, so 304 has a higher strength than 304L, and 304H has the best strength, because the carbon content is the highest among the three.
From the application: 304 can be widely used in various departments, various fields. 304L is mainly used in welding and other fields. 304H is mainly used in high temperature resistance, corrosion resistance and other fields, also used in fields such as welding, bending, and cold deformation ability is very good, has a very high stability and enduring strength, can work in the high temperature of 650 degrees Fahrenheit
About 304 material:304 stainless steel is a common stainless steel material, the density of 7.93 g/cm3, the industry is also called 18/8 stainless steel. High temperature resistance of 800 degrees, with good processing performance, high toughness characteristics, widely used in industrial and furniture decoration industry and food industry.
About 304L material:304L steel as a low C in the general state, its corrosion resistance and 304 similar, but after welding or stress after its excellent corrosion resistance to the grain boundary. In the case without heat treatment, can remain good corrosion resistance, generally use 400 or less (non-magnetic, temperature -196 degrees Celsius to 800 degrees Celsius). Widely used to produce good overall performance requirements (corrosion resistance and formability) of equipment and parts.
About 304H material: 304H is a kind of stainless steel, with good bending, welding process performance, corrosion resistance, high durability and organizational stability, cold deformation ability is very good. The highest temperature can reach 650 DEG C, and the oxidation resistance is up to 850 DEG C
The differences of Chemical composition for 304 304L 304H
Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | N (%) | |
304 | ≤0.08 | ≤0.75 | ≤2.0 | ≤0.045 | ≤0.03 | 18.0-20.0 | 8.0-10.5 | ≤0.1 | |
304L | ≤0.03 | ≤0.75 | ≤2.0 | ≤0.045 | ≤0.03 | 18.0-20.0 | 8.0-12.0 | ≤0.1 | |
304H | 0.04-1.0 | ≤0.75 | ≤2.0 | ≤0.045 | ≤0.03 | 18.0-20.0 | 8.0-10.5 | ---- | |
The differences of Mechanical property for 304 304L 304H
Grade | tensile strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | Hardness (HR) |
304 | ≥515 | ≥205 | ≥40 | ≥92 |
304L | ≥485 | ≥170 | ≥40 | ≥92 |
304H | ≥515 | ≥205 | ≥40 | ≥92 |
Technical | Thickness | Width | Finish | Origin |
Cold rolled | 0.5mm-6.0mm | Standard size in China:1000mm 1219mm 1500mm. Special width:Can be order | 2B / No.4 /HL / BA / Mirror etc | TISCO / ZPSS / JISCO / Baosteel etc |
Hot rolled | 3.0mm-80.0mm | Standard width in China: 1219mm 1500mm 180mm 2000mm Special width:can be ordered | No.1 | TISCO / ZPSS / Baosteel / JISCO etc |
Applications for 304 304L 304H stainless steel
Overall, 304 304L 304H application is quite extensive. Mainly used in construction, decoration and other fields.
1) Because 304 with good processing properties, high toughness characteristics, widely used in industrial and furniture industry and the medical industry food etc filed.What’s more 304 stainless is suitable for food processing, storage and transportation,Plate type heat exchange, corrugated pipe, household appliances (1, 2 kinds of tableware, kitchen cabinet, indoor pipeline, water heater, boiler, bath), auto parts (windshield wiper, muffler, mold), medical appliances, building materials, chemical, food industry, agriculture, marine parts etc..304 stainless steel is a nationally recognized food grade stainless steel.
2) But 304L with lower carbon content,so 304L is widely used in welding filed.
3) 304H has good bending, welding process performance, corrosion resistance, high durability and organizational stability, cold deformation ability is very good. The highest temperature can reach 650 DEG C, and the oxidation resistance is up to 850 DEG C.
Standards for 304 304L 304H stainelss steel
Grade | GB/T 1220-2007 | ASTM | DIN | JIS | KS |
304 | 06Cr19Ni10 | 304 | 1.4301 | SUS304 | STS304 |
304L | 022Cr19Ni10 | 304L | 1.4306 | SUS304L | STS304L |
304H | ---- | 304H | ---- | SUS304H | STS304H |
The weight calculation method for 304 304L 304H stainless steel
Weight(KG/PC)=thickness(mm) x width(Meter) x length(Meter) x 7.93
Small knowledge for 304 stainless steel steel
For 304 stainless steel, the composition of the Ni element is very important, directly determine the corrosion resistance of the 304 stainless steel and its value.
The most important elements of 304 material are Ni, Cr, but not limited to these two elements,specific requirements by product standards.
Industry common judgment that as long as the content of Ni is greater than 8%, Cr content of more than 18%, it can be considered to be the 304 stainless steel.This is why the industry will be called stainless steel 18/8 stainless steel reasons.
In fact, the relevant product standards for 304 have very clear requirements, and these products for different shapes of stainless steel standards and some differences. Here are some common product standards and testing.
To determine whether a material is 304 stainless steel, must meet the requirements of each element of the product standard, as long as there is a non conformity, it can not be called the 304 stainless steel.
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