1.4438  steel
Austenitic Cr-Mo-Ni alloy stainless steel Material number 1.4438
Material number 1.4438 equal materiel :
Stainless Steel 317L,SUS317L,X2CrNiMo18-15-4,S31703
Material number 1.4438 is a molybdenum bearing austenitic chromium nickel steel similar to type 316, except the alloy content in Material number 1.4438 is somewhat higher.  It has a supperior corrosion resistance in special applications where it is desired to reduce contamination to a minimum. Material number 1.4438 was developed primarily to resist more effectively the attack of sulfurous acid compounds.  Howerver, its proven ability to combat corrosion has widened its use considerably and is now being used for many other industrial applications. The low carbon content of Material number 1.4438 provides immunity to intergranular corrosion in applications where heavy cross sections cannot be annealed after welding or where low temperature stress relieving treatments are desired.
 
Material number 1.4438 physical features :
Density (lb / cu. in.): 0.29
Specific Gravity : 7.9
Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) : 0.12
Electrical Resistivity (microhm-cm (at 68 Deg F)) : 444
Melting Point (Deg F) : 2550
Modulus of Elasticity Tension : 28
Material number 1.4438 Design Features :
1.A molybdenum bearing austenitic chromium nickel steel with an alloy content somewhat higher than the 316 grades.
2.Superior corrosion resistance in difficult environments.
3.Higher creep, stress-to-rupture and tensile strengths than other stainless steels.
4.Reduced intergranular precipitation of chromium carbides during welding and stress relieving as well as minimized possibility of corrosion failure from intergranular attack due to low carbon content.
5.Resistance to pitting and crevice corrosion making Material number 1.4438 a successful life-cost product in a variety of highly corrosive environments.
Material number 1.4438 Typical Applications :
1.Flue gas desulfurization scrubber systems
2.Chemical and petro-chemical processing equipment
3.Pulp and paper plants
4.Food processing equipment
5.Textile equipment
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