Chemical components: the chemical components of the product should accord with the following table.
|
Elements
|
Content
|
|
Fe
|
0.0200
|
|
Ni
|
0.0050
|
|
Al
|
0.0050
|
|
Si
|
0.0100
|
|
Ca
|
0.0050
|
|
Mg
|
0.0030
|
|
P
|
0.0020
|
|
C
|
0.0100
|
|
O
|
0.0800
|
|
N
|
－
|
|
Pb
|
0.0010
|
|
Bi
|
0.0010
|
|
Sn
|
0.0010
|
|
Sb
|
0.0010
|
|
Cd
|
0.0010
|
Appearance: silvery gray metallic luster, no phenomenon of water absorption.
Surface quality: there should be no superfusion, bubbling, layering, cracks, severe oxidation, stains and other defects as well as edge/corner failures with the length of more than 8mm, the width of more than 3mm and the depth of more than 1mm on the product surface; traces formed by the contact among steel-making molybdenum bars in the sintering process do not consider as physical defects.
Hysical properties: Hardness; Density
Packaging: the product is packaged by wooden cases or cartons internally cushioned with foam partition plates. There should be “Moisture-proof”, “Fragile”, “Up” and other words or labels on each case besides product quality certificate.
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