SE-400 (NO4400)

SECORP designation (UNS NO.)

Nickel-copper solid solution, moderate strength. Good general corrosion resistance, especially to deaerated hydrochloric and hydrofluoric acids. Resists corrosion by sea-water.

Major Applications

Marine fixtures, shafting, valves, pumps, fasteners. Salt evaporators, piping. HF reboilers; chlorinated solvent. Acid pickling hardware.

NOMINAL CHEMICAL COMPOSITION (%):

Cr	Ni	Fe	Mo	Cu	C	Others
-	66.5	1.2	-	Bal	0.08	Mn-1.0

TYPICAL MECHANICAL PROPERTIES:

METALLURGICAL CONDITION	TENSILE STRENGTH Ksi (MPa)	YIELD STRENGTH 2% OFFSET Ksi (MPa)	ELONGATION (%)	HARDNESS
ANNEALED	80 (550)	35 (240)	45	70 RB
COLD DRAWN STRESS RELIEVED	100 (690)	70 (480)	30	90 RB

CORROSION RESISTANCE:

H₂SO₄	HIC	H₃PO₄	HNO₃	ORGANIC ACIDS	ALKALINES	SEA WATER	CHLORIDE CRACKING
G	A	X	NR	G	G	G	G

SPECIFICATION