Stainless Steel Grades
We produce ASTM/ASME Grade 304, Grade 304L,304h, 316, 316L, 316H, 316TI, 321, 321H, 309S, 309H, 310S, 310H, 410S, 2205, 904L, 2507, 254, gh3030, 625, 253MA, S30815, 317L, Type 317, 316lN, 8020, 800, 800H, C276, S32304 and others special requirement stainless steel grade.
Although ASTM grade CF8M and AISI 316 are both austenitic stainless steels, AISI 316 is nonmagnetic as a result of it’s basically austenite. Cast 316 or CF8M is barely magnetic, however, because it is not completely austenite and contains from 5 – 20 % ferrite. By decreasing or eliminating the amount of ferrite in the chemical composition, wrought material manufacturers are able to make an alloy that is easier to roll into sheets or bars. Cast materials manufacturers do not have the same necessities and therefore, can use a slightly harder alloy that incorporates ferrite. The most simple difference between the grades of metal is the presence of molybdenum in stainless 316.
Grade Specification Comparison
304 stainless steel is the most versatile and widely used austenitic stainless steel on the earth, due to its corrosion resistance. 304 stainless can also be cheaper in price in comparison with 316, another excuse for its popularity and widespread use. Grade 904L stainless steel is a non-stabilized austenitic stainless steel with low carbon content. This high alloy stainless steel is added with copper to improve its resistance to sturdy reducing acids, corresponding to sulphuric acid. The steel can also be immune to stress corrosion cracking and crevice corrosion.
The alloy has a tensile energy of 579 MPa (84 ksi) and a most use temperature of round 800˚C (1,472˚F). To the layman, the differences between one grade of stainless steel and another are simple to overlook. However, to a producer, the difference between chrome steel alloys corresponding to grade 304 chrome steel and grade 316 can be large. Machining chrome steel grade 317L requires low speeds and fixed feeds to scale back its tendency to work harden.
- The increased nickel content material and the inclusion of molybdenum makes grade 316 stainless-steel a bit costlier than grade 304 per ounce of material.
- But where grade 316 stainless proves superior is its increased corrosion resistance—notably towards chlorides and chlorinated options.
- This makes grade 316 stainless notably desirable for functions the place publicity to salt or different highly effective corrosives is an issue.
Our stainless production range
Though the chrome steel 304 alloy has a better melting level, grade 316 has a greater resistance to chemical substances and chlorides (like salt) than grade 304 stainless-steel. When it comes to functions with chlorinated options or publicity to salt, grade 316 stainless steel is considered superior. The elevated nickel content and the inclusion of molybdenum allows for grade 316 chrome steel to have better chemical resistance than 304 stainless-steel.
Grade 904L is less immune to nitric acid than grades 304L and 310L, that are freed from molybdenum. This steel grade must be resolution treated following chilly working, to attain most stress corrosion cracking resistance under critical environments. Grade 904L stainless steels have wonderful resistance to heat seawater and chloride attack. The high resistance of grade 904L in opposition to stress corrosion cracking is because of the presence of high amounts of nickel in its composition. Moreover, the addition of copper to those grades develops resistance to sulphuric acid and different reducing agents in both aggressive and mild conditions.
Since sterilization processes in these industries combine each sturdy disinfectants and or with high temperatures to prevent contamination, a resistant alloy such as grade 316 is ideal. Grade 316 is a well-liked alloy of chrome steel with a melting range of two,500 °F – 2,550 °F (1,371 °C – 1,399 °C). As an austenitic stainless-steel alloy, it has qualities such as high power, corrosion resistance, and high concentrations of chromium and nickel.
The Pros And Cons Of 304 Vs 316 Stainless Steel
The basic mechanical properties of the 2 metals are principally comparable. If you’ve an utility with very highly effective corrosives or relies on chlorides, then paying a premium for grade 316 chrome steel is unquestionably value it. In such purposes, 316 stainless will final many times longer than grade 304 chrome steel would—which might mean many extra years of helpful life. Grade 316 has particularly higher resistance to salt and chloride pitting. Pitting corrosion can happen when chrome steel alloys, corresponding to grade 304 stainless steel, come into contact with salt-rich sea breezes and seawater.
We have thousands tons stock of stainless steel sheet and coil with various size and grade,mainly include austenitic stainless steel, martens stainless steel (including precipitation hardened stainless steel sheet & coil), ferritic stainless steel, and duplex stainless steel.
Characteristics of Stainless Steel Sheet and Plate:
High corrosion resistance
High toughness and impact resistance
High workability, including machining, stamping, fabricating and welding
Smooth surface finish that can be easily clean