Astm a240 type 904l plates has excellent resistance to warm seawater and chloride attack. The high resistance of Astm a240 type 904l plates is against stress corrosion cracking and Astm a240 type 904l plates is due to the presence of high amounts of nickel in its composition.

CHEMICAL PROPERTIES:

Astm a240 type 904l plates Typical Chemical Composition % (max values, unless noted)
Grade	Cr	Ni	C	Si	Mn	P	S	Mo	Cu	Fe
904L	min: 19 max: 23	min: 23 max: 28	0.02 Max	1.0 max	2.0 max	0.045 max	0.035 max	min: 4 max: 5	min: 1 max: 2	balance

This Astm a240 type 904l plates steel has an extensively higher coefficient of thermal expansion as non-alloyed steel. In connection with a worse thermal conductivity, a greater distortion has to be expected. When welding Astm a240 type 904l plates all procedures, which work against this distortion (e.g. back-step sequence welding, welding alternately on opposite sides with double-V butt weld, assignment of two welders when the components are accordingly large) have to be respected notably.

Astm a240 type 904l plates