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  • SUS 304 STAINLESS STEEL

SUS 304 STAINLESS STEEL

by Nundnet / Friday, 18 March 2011 / Published in Access Controls, Technology, Turnstiles
SUS 304 STAINLESS STEEL

SUS 304 Stainless steel is one of the standards of steel. Stainless steel is an alloy of chromium and nickel. Sometimes, it is referred as SUS, an acronym from the Japanese Industrial Standards (JIS). Generally SUS is Steel Use Stainless.

Also known as A2 steel, 304 stainless steel has excellent resistance to a wide range of atmospheric environments and many corrosive media. It is subject to pitting and crevice corrosion in warm chloride environments and to stress corrosion cracking above about 60°C. It is considered resistant to potable water with up to about 200 mg/L chlorides at ambient temperatures, reducing to about 150 mg/L at 60 °C.

SUS 304 stainless steel is also very sensitive at room temperature to the thiosulfate anions released by the oxidation of pyrite (as encountered in acid mine drainage) and can undergo severe pitting corrosion problems when in close contact with pyrite- or sulfide-rich clay materials exposed to oxidation.

For more severe corrosion conditions, when 304 stainless steel is too sensitive to pitting or stress corrosion cracking.

Different Steel standards are selected for different applications considering durability and engineering requirements.

MATERIAL COMPOSITION

DESCRIPTION304S304L304H
Density (kg/m3)8000
Tensile Strength (Mpa)515~520485~607515~720
Yield Strength (Mpa)205170205
Poisson’s ratio(min)0.27-0.30
Elongation A5(%)404040
Proof stress .02%(MPa)210200210
Brinell Hardness (HB)929292
Chemical Composition (%age)
Carbon (C)≤ 0.08≤ 0.03≤ 0.040~0.10
Silicon (Si)≤1.00≤ 0.75≤ 0.75
Manganese (Mn)≤ 2.00≤ 2.00≤ 2.00
Phosphorous (P)≤ 0.045≤ 0.045≤ 0.045
Sulphur (S)≤0.030≤0.030≤0.030
Nickel (Ni)≤ 8~10.50≤ 8~10.50≤ 8~10.50
Chromium (Cr)≤ 18.00~20.00 ≤ 18.00~20.00≤ 18.00~20.00
Typical physical properties
Density8.00g/cm3
Melting Point1450C
Young’s Modulus (GPa)190
Electrical resitivity0.072 x 10-6Um
Thermal conductivity16.2W/m.K
Thermal expansion17.2 x 10.6/K
Equivalent Standards
DINX5CrNi1810DIN
AISI 304AISI
X4CrNi18-10EN
BS304S31BS
11ISO
0

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