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446 stainless steel

Views: 1     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.we could supply you kinds of ASTM446 Seamless stainless steel pipe and TP446 welded stainless steel pipe

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)
4460.12 max1.50 max0.75 max0.04 max0.03 maxmin: 23.0 max: 30.00.50 maxBalancemin: 0.10 max: 0.25

446 Stainless steel mechanical properties:

Typical Room Temperature Mechanical Properties
GradeTensile StrengthKSI (MPA)Yield Strength 0.2% KSI offset KSI (MPA)Elongation (% in 2ʺ(50.8 mm)Hardness (Brinell) MAXHardness (Rockwell B) MAX
446654020%159B95 Max

Ruiyang company is a leading 446 stainless steel pipe supplier,446 stainless steel bars and rods supplier,welcome inquiry us 446 stainless steel just mail to info@topqualityalloy.com



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