HL Steel Industries Sdn Bhd
What is Stainless Steel?
Stainless steel is essentially a low
carbon steel which contains chromium at 10% or more by weight. It is this addition of
chromium that gives the steel its unique stainless, corrosion-resisting properties.
The chromium content of the steel allows the formation of a rough, adherent, invisible,
corrosion-resisting chromium oxide film on the steel surface. If damaged mechanically or
chemically, this film is self-healing, providing that oxygen, even in very small amounts,
The corrosion resistance and other useful properties of the steel are enhanced by increased
chromium content and the addition of other elements such as molybdenum, nickel, and nitrogen.
There are more than 60 grades of stainless steel. However, the entire group can be divided into
five families. Each is identified by the alloying elements which affect its microstructure and
for which each is named.
Specifications By Stainless Steel Grade
303 - A non-magnetic stainless steel specially designed for improved machinability.
304 - Chromium-Nickel austenitic alloy used in a wide range of applications.
304L - Chromium-Nickel austenitic alloy used in a wide range of applications.
316L - Molybdenum bearing austenitic stainless steels which are more resistant to general corrosion
and pitting/crevice corrosion.
317L - Molybdenum bearing austenitic stainless steels with increased resistance to chemical attack
compared to standard chromium-nickel austenitic stainless steels.
317LMN 317L + - increased levels of moly and nitrogen for enhancing resistance to pitting and crevice corrosion.
304H - Modification of 304 in which the carbon content is controlled to a range of 0.04 – 0.10 to provide
improved high temperature strength.
321/321H - A stabilized stainless steel which has excellent resistance to intergranular corrosion following
exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F.
347/347H - Stabilized stainless steel which offers excellent resistance to intergranular corrosion following
exposure to temperatures in the chromium precipitation range from 800 to 1500°F.
309/309S - Austenitic stainless steel used in applications where elevated temperatures are present.
310S - Austenitic stainless steel used in applications where elevated temperatures are present.
410 - Hardenable, straight-chromium stainless steel which combines superior wear resistance with excellent
410S - Low carbon non-hardening modification of 410. Resists cracking when exposed to high temperatures or in
the as-welded condition.
LDX 2101 - Low nickel lean duplex stainless steel possessing both superior strength and chloride stress-corrosion
cracking resistance when compared to 300 series stainless steels.
2304 - A high chromium-low nickel-moly free duplex stainless steel exhibiting improved strength and stress
corrosion resistance properties compared to 304/316 austenitic stainless steels.
2205 - A high chromium-nickel-moly duplex stainless steel providing high strength and superior resistance to general,
local, and stress corrosion compared to 316L or 317L.
2507 - A chromium-nickel-moly super duplex stainless steel with exceptional strength and corrosion resistance in the
chemical process, petrochemical, and seawater environments.
17-4PH - Martensitic stainless steel that is capable of precipitation hardening. This stainless steel has very high
strength and hardness.
SSC-6MO - Superaustenitic 6% molybdenum alloy that exhibits superior resistance to chloride pitting, crevice corrosion
and stress-corrosion cracking when compared with the standard 300 series and duplex stainless steels. Premier
corrosion resistant austenitic stainless steel.