420 Stainless Steel Tube

General Properties 420 Stainless steel tube is a grade of stainless steel produced by ASTM A276-2006 Stainless steel bar and profile. 420 is equivalent to China's 3CR13 stainless steel pipe, containing chromium weight percentage 12-14%, with a minimum carbon value of 0.15%, the typical value...

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General Properties

420 Stainless steel tube is a grade of stainless steel produced by ASTM A276-2006 Stainless steel bar and profile.

420 is equivalent to China's 3CR13 stainless steel pipe, containing chromium weight percentage 12-14%, with a minimum carbon value of 0.15%, the typical value is 0.31%.

Characteristics and uses

Because the carbon content of about 0.31%, so more than 2cr13 (carbon content of about 0.2%) after quenching the hardness is high, as a knife blade, nozzle. Valve seat, valve, etc. But because the corrosion-resistant element ni content is only below 0.75%, the corrosion resistance ability is limited therefore 420 will rust

Chemical Composition(%)

C < 0.15

Mn < 1.00

Si < 1.00

P < 0.04

S < 0.03

Cr: 12.0~14.0

Advantages

Corrosion Resistance

Less resistant than the austenitic grades and the 17% chromium ferritic alloys

Good resistance in the hardened condition to the atmosphere, foods, fresh water, and mild acids

Resistance lowered in the annealed condition

Best with a smooth surface finish

Heat Resistance

Not recommended for use above the relevant tempering temperature because of reduction in mechanical properties

Scaling temperature is approximately 1202oF (650oC)

Machinability

Tough, stringy chip build-up.

Similar to machining some of the high carbon tool steel

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