|
Alloy |
UNS Number |
SAE Number |
|
446 |
UNS S44600 |
GENERAL PROPERTIES
The grade 446 stainless steel is a ferritic, non-heat treatable stainless steel that provides good resistance to high temperature oxidation and corrosion. The following datasheet provides more details of grade 446 stainless steel.
PHYSICAL PROPERTIES
|
Melting Point |
Density |
Specific Gravity |
Modulus of Elasticity |
|
1510 ℃ |
7.80g/cm3 |
7.45 |
200 GPa |
MECHANICAL PROPERTIES
|
Alloy |
Tensile Strength |
Yield Strength |
% Elongation |
|
446 Annealed * |
79,800 |
50,000 |
20 |
CHEMICAL PROPERTIES
|
Alloy |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Fe |
|
446 |
0.2 |
1.00 |
1.5 |
0.04 |
0.03 |
23 – 27 |
0.25 |
Bal |
WELDING
The grade 446 stainless steel can be easily welded using most of the traditional methods except oxyacetylene welding. Type 308 welding material can be used if required, but it will not exhibit scaling resistance equal to the base metal. Differences in coefficient of thermal expansion of base and weld metal has to be taken into consideration.
HEAT TREATMENT
ANNEALING
Annealing should be carried out at a temperature of 1400/1525ºF (760/830ºC) followed by air cooling. Again, as with other high chromium steels, avoid soaking at or slow cooling through the temperature range 700/1000ºF (370/525ºC) to prevent embrittlement.
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