ATI 334Mo Steel

ATI 334Mo Steel

Steel name: ATI 334Mo
Diagram No.: 2248
UNS designation: S33425
ASTM designation: A240 and A480
Chemical composition in weight %: max. 0.08% C, max. 1.00% Si, max. 1.50% Mn, max. 0.045% P, max. 0.020% S, 21.00-23.00% Cr, 2.00-3.00% Mo, 20.00-23.00% Ni, 0.15-0.60% Al, 0.15-0.60% Ti
Steel group: Austenitic stainless steels
Properties: ATI 334Mo alloy has relatively high chromium content for corrosion and oxidation resistance. The alloy contains molybdenum for resistance to aqueous corrosion and manganese for resistance to oxidation in air containing water vapor. A small amount of titanium is added for resistance to sensitization and resultant susceptibility to intergranular corrosion. ATI 334Mo alloy contains significantly less nickel than ATI 332Mo alloy, making the alloy less expensive and moderating the volatility in its raw materials surcharge.
Applications: ATI 334Mo alloy is a proprietary austenitic Fe-Ni-Cr-Mo stainless steel intended primarily as a high performance and economical material for use in automotive flexible couplings. It is a relatively lean alloy that achieves performance similar to ATI 332Mo alloy (UNS S35125) by providing resistance to both aqueous corrosion and elevated temperature degradation while possessing excellent weldability and formability.
Reference: Not shown in this demo version.

Heat Treatment
Primary reasons for annealing are to produce a recrystallized microstructure with a uniform grain size and to dissolve detrimental precipitates. ATI 334Mo alloy should be annealed between 2000 and 2150°F (1093- 1179°C) for at least 30 minutes (time at temperature) per inch of section thickness. This is a general recommendation only – specific cases may require further investigation.
Diagram note: No data

Elevated Temperature Tensile Properties of ATI 334Mo Alloy

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