Telling 304 From 316 Stainless?

Trade Item�� EXW,FOB,CNF,CIF,CFR

duplex and super duplex

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 strength
High toughness and impact resistance
Temperature resistance
High workability, including machining, stamping, fabricating and welding
Smooth surface finish that can be easily clean

The quantity of Cr and C are adjusted in such a means that a martensitic construction is obtained. Several different elements, for instance, tungsten, niobium, and silicon, could be added to alter the toughness of the martensitic SS. The addition of small quantities of nickel enhances the corrosion resistance and toughness, and the addition of sulfur on this alloy improves the machinability. They have good mechanical properties and reasonable corrosion resistance, and they’re ferromagnetic.

Martensitic SS have a body-centered tetragonal crystal structure. The Cr content material in martensitic SS varies from 10.5% to 18%, and the carbon content can be larger than 1.2%.

Stainless steel is graded by the elements and percentages. The chromium content material should be 18% or extra to be 304 stainless. After a 500 ton press squeezes the nickel it modifications the distribution of the nickel. The similar is true where the die cuts the stainless rising the likelihood that rust will eventually happen there. All chrome steel is magnetic besides austenitic stainless steel which is actually 300 sequence stainless corresponding to 304 and 316.

Austenitic stainless steels have a high amount of austenite which makes them mostly non-magnetic. Even although grades such as 304 and 316 stainless-steel have excessive quantities of iron of their chemical composition, austenite means they are non-ferromagnetic. However, if the crystal structure of an austenitic chrome steel is changed through work-hardening or particular thermal therapy, then ferrite can kind in some areas making the steel partially magnetic. Chemical qualitative identification is a technique of identifying whether magnetic stainless steels incorporates nickel.

• The quantity of Cr and C are adjusted in such a means that a martensitic construction is obtained.
• Martensitic SS have a body-centered tetragonal crystal structure.
• The Cr content in martensitic SS varies from 10.5% to 18%, and the carbon content may be larger than 1.2%.
• The addition of small quantities of nickel enhances the corrosion resistance and toughness, and the addition of sulfur on this alloy improves the machinability.

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.

Stock Thickness: 0.1-200.0mm
Production thickness: 0.5.0-200mm
Width: 600-3900mm
Length: 1000-12000mm
Grade:
200 series: 201,202
300 series: 301,304,304L,304H,309,309S,310S,316L,316Ti,321,321H,330
400 series: 409,409l,410,420J1,420J2,430,436,439,440A/B/C
Duplex: 329,2205,2507,904L,2304
Surface: No.1,1D,2D,2B,NO.4/4K/hairline,satin,6k,BA,mirror/8K

However, 300 sequence stainless is non-magnetic solely after it’s freshly formed. 304 is almost for positive to turn out to be magnetic after chilly work similar to pressing, blasting, chopping, and so on. Initially the chilly work causes the stainless to select up overseas particles corresponding to free iron.

In common, the low chromium content together with high carbon content material within the martensitic grades decrease corrosion resistance in comparison with the opposite classes of stainless steels. Thus, they are broadly selected for delicate ambient circumstances requiring a mixture of high energy and corrosion resistance. The low chromium and low alloying component content of the martensitic stainless steels also makes them less expensive than the opposite types. The magnet check is NOT a correct way to confirm stainless-steel.

jindal steel pipe 202

This microstructure is current at all temperatures due to the chromium addition, so they don’t seem to be hardenable by warmth treatment. They can’t be strengthened by chilly work to the identical diploma as austenitic stainless steels. Austenitic stainless steel is the largest family of stainless steels, making up about two-thirds of all stainless-steel manufacturing . They possess an austenitic microstructure, which is a face-centered cubic crystal construction.