Views:0 Author:Ruiyang company Publish Time: 2021-08-23 Origin:SHAANXI RUIYANG IMPORT AND EXPORT CO.,LTD
446 stainless steel is a high chromium,ferritic,heat resistant,stainless steel grade.
Type 446 is used for furnace parts,oil burners,heat exchangers,kiln liners,glass molds and stationary soot blowers in steam boilers.Type 446 is the only heat-resistant alloy that will tolerate molten copper and brass. The alloy does not, however, have good high-temperature strength. The nitrogen addition is for grain refinement.446 Stainless steel pipe properties:--suitable for high temperature applications:
|Corrosion and Oxidation Resistance|
Excellent corrosion resistance in many industrial environments.
Excellent oxidation resistance at elevated temperatures (up to 2000° F).
Fair Sulfidation resistance.
Good resistance to chlorides, organic acids, and molten copper.
446 steel pipes have a high ductile-to-brittle impact transition temperature.
It is recommended to work on 446 steel pipes at slow speeds with positive feeds with rigid mounts and sharp tooling surfaces.
Suggested preheating to 250-400° F.
Most conventional welding methods can be successfully employed with 406 stainless steel pipes.
Preheating and postheating to 300-600° F is suggested.
Austenitic weld fillers, like AWS E310 or E312 are generally used to maximize weld deposit ductility.
Oxyacetylene welding is not recommended.
Forging recommended to begin at 2100° F, and finish at 1600° F.
Grain refinement and room temperature embrittlement can be achieved by performing final 10% of work below 1600° F.
|Hot Working||446 steel pipes is recommended between 2000 – 2150° F.|
|Cold Working||446 is more difficult to bend, draw, spin, and weld than other stainless steel due to its elevated chromium content.|
Annealing, should be performed at 1550-1650° F followed by rapid cool.
Recommended to soak and water quench at 1500° F.
Do not exceed 1650° F at any time.
Slow cooling below 1200° F will result in the loss of ductility.
Stainless steel pipes of 446 grade do not respond to heat treatment.
446 Stainless steel chemical components:
|Typical Chemical Composition % (max values, unless noted)|
|446||0.12 max||1.50 max||0.75 max||0.04 max||0.03 max||min: 23.0 max: 30.0||0.50 max||Balance||min: 0.10 max: 0.25|
446 Stainless steel mechanical properties:
|Typical Room Temperature Mechanical Properties|
|Grade||Tensile StrengthKSI (MPA)||Yield Strength 0.2% KSI offset KSI (MPA)||Elongation (% in 2ʺ(50.8 mm)||Hardness (Brinell) MAX||Hardness (Rockwell B) MAX|
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