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Grade NAS 625
Classification Alloy Steel
Properties Corrosion Resistance
Density 8.44 g/cm3
NAS 625 Chemical Element Composition Content (%)
Component Fe C Si Mn P S Cr Ni Mo Ti Nb Co Al
Minimum Value - - - - - - 20 58 8 - 3.15 - -
Maximum Value 5 0.01 0.5 0.5 0.015 0.015 23 - 10 4 4.15 1 4
NAS 625 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
Coil, thick plate, thin sheet; t=11.1 Solid Solution Treatment ≥826 ≥407 ≥62 ≤201
Coil, thick plate, thin sheet; t=2.5 Solid Solution Treatment ≥832 ≥392 ≥57 HV
≤197

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