309/309S stainless steel Chemical Composition,309 / 309S stainless steel Machining service

Posted:2014-11-30 22:42:11

309/309S stainless steel is typically used for elevated temperature applications. Its high chromium and nickel content provides comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than the common austenitic Alloy 304.

Due to their high chromium and nickel content, Alloys 309/309S stainless steel are highly corrosion resistant, have outstanding resistance to oxidation, and excellent heat resistance while providing good strength at room and elevated temperatures. The only significant difference between 309 and 309S is the carbon content. Alloy 309S has a much less carbon composition which minimizes carbide precipitation and improves weldability.

309/309S stainless steel Chemical Composition: (A167, A240)

Element	Type 309	Type 309S
Carbon	0.20 max.	0.08 max.
Manganese	2.00 max.	2.00 max.
Sulfur	0.030 max.	0.030 max.
Phosphorus	0.045 max.	0.045 max.
Silicon	0.75 max.	0.75 max.
Chromium	22.0 – 24.0	22.0 – 24.0
Nickel	12.0 – 15.0	12.0 – 15.0

309/309S stainless steel Mechanical Properties: (ASTM A167, A240)

Type	Yield Strength 0.2% offset (KSI)	Tensile Strength (KSI)	% Elongation (2" Gauge length)	Hardness Rockwell
309	30 min.	75 min.	40 min.	HRB 95 max.
309S	30 min.	75 min.	40 min.	HRB 95 max.

Katalor Enterprises as a 309 / 309S stainless steel Manufacturer , we also can supply 309 / 309S stainless steel Machining service , so any need in 309 / 309S stainless steel , please contact us！

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