304 Vs 316 Stainless Steel

material sus304

Unlike carbon steel, stainless steels do not suffer uniform corrosion when exposed to wet environments. Unprotected carbon steel rusts readily when exposed to a combination of air and moisture. In addition, as iron oxide occupies a larger volume than the unique steel, this layer expands and tends to flake and fall away, exposing the underlying steel to additional attack. This passive movie prevents further corrosion by blocking oxygen diffusion to the steel surface and thus prevents corrosion from spreading into the majority of the metallic. This film is self-repairing, even when scratched or temporarily disturbed by an upset condition within the setting that exceeds the inherent corrosion resistance of that grade.

We use martensitic stainless-steel where a moderate level of corrosion resistance and excessive energy is needed. As it’s counted among the many magnetic kinds of stianless steel, it has low formability and weldability. Companies use martensitic chrome steel imostly in long products that require sheet and plate type. Stainless steel is now used as one of many supplies for tramlinks, along with aluminium alloys and carbon steel.

On the opposite hand, steel workers typically choose ferritic stainless-steel because of its resistance to emphasize corrosion cracking. The minimal 10.5% chromium in stainless steels provides resistance to roughly 700 °C (1,300 °F), whereas 16% chromium supplies resistance up to approximately 1,200 °C (2,200 °F). Type 304, the most common grade of stainless steel with 18% chromium, is immune to approximately 870 °C (1,600 °F). Other gases, similar to sulfur dioxide, hydrogen sulfide, carbon monoxide, chlorine, also assault stainless-steel.

What is the hardest steel grade?

Type 409: One of the least expensive Stainless grades due to its decreased chromium content. This type should only be used for interior or exterior parts in non-critical corrosive environments. Typical applications include muffler stock.

With a microstructure that’s half austenitic and half ferritic, duplex stainless-steel has the next energy than these kind of stainless steel. “Lean” duplex chrome steel is designed to have similar corrosion resistance to regular austenitic stainless steel.

Why is it called 316 stainless steel?

Stainless steel 316 (SS316) is an austenitic chromium-nickel stainless steel containing deliberate amount of molybdenum which increases general corrosion resistance and especially improves its pitting resistance to chloride ion solutions. Thus, SS316 is also known as “Mo-Added” version of SS304.

Stock Thickness: 0.1-200.0mm
Production thickness: 0.5.0-200mm
Width: 600-3900mm
Length: 1000-12000mm
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

  • Additionally, you can not harden ferritic steel with heat remedy.But you need to use it in sea water or other aggressive circumstances whenever you include an addition of Molybdenum.
  • Although, contractors use ferritic chrome steel for a wide range of applications that don’t require welding.
  • Compared to other forms of stainless steel, it is usually limited to make use of of comparatively thin sections, because of of a scarcity of toughness in welds.
  • Based on Chromium with small portions of Carbon, ferritic stainless steelhas a similar microstructure to both carbon and low alloy steels.

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.

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

But only in a much greater temperature giving it formability and weldability. Furthermore, you can make austenitic stainless-steel corrosion resistant by adding Nitrogen, Chromium, and Molybdenum. While you can not harden it with heat, austenitic chrome steel has the useful property of retaining a helpful level of toughness and ductility when hardened to high strength. Typical austenitic stainless steelis susceptible to emphasize corrosion cracking, however austenitic chrome steel with higher nickel content has increased resistance to emphasize corrosion cracking. Nominally non-magnetic, austenitic stainless steel shows some magnetic response relying on its composition.

astm a269 tp316l

Additionally, you can’t harden ferritic steel with heat therapy.But you need to use it in sea water or different aggressive situations when you include an addition of Molybdenum. Ferritic chrome steel can also be magnetic, however not as formable as austenitic chrome steel for example.


Austenitic stainless-steel is the most important 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. Thus, austenitic stainless steels usually are not hardenable by heat remedy since they possess the identical microstructure in any respect temperatures.

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