Density Kg/dm3:8.6
ASTM / ASME
PLATES:B/SB 575
WELDED PIPES:B/SB 619
SEAMLESS PIPES:B/SB 622
FITTINGS:B/SB 366 WPHC4
VdTÜV
424
Reference:B/SB 575
Tensile Strength min N/mm2:690
Yield Point min N/mm2:276
Elongation 2” min %:40
Hardness max HB **:226
Hardness max HRB **:100
C % max:0.015
Mn % max:1
Si % max:0.08
P % max:0.04
S % max:0.03
Cr %:14 – 18
Ni %:Resto Balance
Mo %:14 – 17
Fe %:3 max
Cu % max:-
Al % max:2.0
Co % max:-
Other elements:Ti 0.7 max
* Alloy C4 is an austenitic low-carbon nickel-molybdenum alloy. The main difference between this and other alloys of similar composition developed earlier, is its reduced carbon, silicon, iron and tungsten contents. This composition shows greater stability during extended exposure to temperatures in the range 650-1040°C (1200-1900°F). As a result, resistance to intergranular corrosion is improved. It shows a very good resistance to a wide range of corrosive media (mineral acids, solvents, chlorine, formic and acetic acids, sea water and brine solutions), particularly under reducing conditions and excellent resistance to localized corrosion in halide media. * Inorganic chemistry, flue gas desulphurating plants, fertiliser industry, acetic acid, waste incineration plants, heat exchangers, pickling baths and acid regeneration, titanium dioxide production (chloride route), electrolytic galvanizing rolls.