Introduction To The Astm Designation System

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, , 8020, 800, 800H, C276, S32304 and others special requirement stainless grade.

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The commonest types of stainless steels are austenitic stainless steels. Compared to different forms of stainless steels, austenitic stainless steels are extremely excessive in nickel content material. Generally, they may also contain excessive amounts of chromium, nitrogen, and molybdenum.

What Is 316 Stainless Steel?

The “L” grades are used to additional corrosion resistance after welding. The letter “L” after a chrome steel grade quantity signifies low carbon. Carbon ranges are kept to .03% or underneath to avoid carbide precipitation, which can result in corrosion. Due to the temperatures created during the welding course of (which may lead to carbon precipitation) – “L” grades are sometimes used.

Unprotected carbon metal rusts readily when uncovered to a mixture of air and moisture. The ensuing iron oxide floor layer is porous and fragile. In addition, as iron oxide occupies a larger quantity than the original metal, this layer expands and tends to flake and fall away, exposing the underlying metal to further assault.

  • Types 304 and 316 stainless steels are standard supplies of development in touch with water.
  • The 10.5% chromium in stainless steels provides resistance to roughly seven hundred °C (1,300 °F), while sixteen% chromium supplies resistance as much as roughly 1,200 °C (2,200 °F).
  • Applications embrace a spread of circumstances including , potable water and wastewater remedy, desalination, and brine therapy.
  • Stainless steels have a protracted historical past of application in touch with water because of their excellent corrosion resistance.


Our stainless production range

Ferritics with out Ni could have a lower CO2 footprint than austenitics with 8% Ni or more. Unlike carbon metal, stainless steels don’t undergo uniform corrosion when exposed to moist environments.

Duplex grades are usually most popular thanks to their corrosion resistance and higher energy, permitting a reduction of weight and a long life in maritime environments. The ease of welding largely is dependent upon the type of chrome steel used. Austenitic stainless steels are the easiest to weld by electric arc, with weld properties much like those of the base metallic (not chilly-worked). Post-weld warmth remedy is sort of all the time required while preheating before welding is also needed in some cases. Type 304 and Type 316 stainless steels are unaffected weak bases corresponding to ammonium hydroxide, even in excessive concentrations and at excessive temperatures.

As an austenitic stainless-steel alloy, it has qualities similar to high strength, corrosion resistance, and excessive concentrations of chromium and nickel. The alloy has a tensile energy of 579 MPa (eighty four ksi) and a use temperature of round 800˚C (1,472˚F). Stainless steel is now used as one of the materials for tramlinks, along with aluminium and carbon steel.


Another popular high-performing alloy, grade 304 stainless-steel is a durable material by way of tensile power, durability, corrosion, and oxidation resistance. The melting level of stainless steel 304 is reached at temperatures ranging between 2,550 °F – 2,650 °F (1399 °C – 1454 °C).

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

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