UNS S31277

It is an advanced super austenitic stainless steel containing 7% molybdenum that provides better corrosion resistance than 6% molybdenum super austenitic stainless steel in most environments. In many contexts. The corrosion resistance provided by 27-7Mo alloy is close to that of most high-alloy materials.

UNS S31277Chemical composition：

	Ni	Cr	Mo	Cu	Fe	Mn	P	S	Si	C
Min	26.0	20.5	6.5	0.5	Bal
Max	28.0	23.0	8.0	1.5		3	0.03	0.01	0.5	0.02

UNS S31277Physical properties：

Specific heat(J/kg･K)	454
Densityg/cm³	8.023

UNS S31277Mechanical properties：

alloy	tensile strength	Yield strong(0.2%)	Elongation %	hardness
INCOLOYalloy25-6MO	95/655	45/310	42	90
NCOLOY alloy27-7MO	120/827	60/414	50	95
INCONELO alloy625	125/862	68/469	50	95
INCONELalloy C-276	105/724	50/345	60	88

UNS S31277Alloy properties：

Corrosion resistance: The molybdenum content in the HuaNickel 27-7Mo alloy gives it the ability to resist reducing acids, while the chromium content of the alloy results in resistance to oxidizing acids.

Hot workability: HuaNickel UNS S31277 alloy can be easily machined, formed, and joined using conventional equipment, techniques, and products. Forming can be in either a cold or hot state.

UNS S31277Uses of alloys：

HuaNickel  UNS S31277 is also widely used in environmental protection, power and other fields, especially in the case of corrosion-resistant materials. Due to its excellent corrosion resistance, this alloy is commonly used in the manufacture of equipment that handles contaminants, such as filters and reactors.

UNS S31277Process performance：

Welding processes: such as tungsten gas arc welding (GTAW), gas shielded metal arc welding (GMAW), manual arc welding (SMAW), submerged arc welding (SAW) and plasma arc welding (PAW).

Machinability: The machinability of 27-7Mo alloy is similar to that of other austenitic alloys. The product can be easily processed in the annealed state.

Relevant standards：

ASTM A 479/ASME SA 479 ,、ASTM A 240/ASME SA 240、 ASTM A 213/ASME SA 213 、 ASTM A 249/ASME SA 249、ASTM A 312/ASME SA 312、- ASTM A 182/ASME SA 182