303

HuaNickel 303 stainless steel is a non-magnetic austenitic stainless steel that cannot be hardened by heat treatment. It is a free machining modification of the basic 18% chromium-8% nickel stainless steel.

303Chemical composition：

	Fe	Cr	Ni	C	P	S	Si	Mo
Min	Bal	17	8	–	–	0.15	–	–
Max		19	10	0.15	2	–	1	0.6

303Physical properties：

Density	Melting point	Thermal conductivity at 212°F
0.290 lb/in³	2552 °F	113.2（Btu x in）/（hr x ft2 x°F）

303Mechanical properties：

Tensile strength, ksi	70
Yield strength, ksi	30
Elongation 2″, %	35
Area Reduction %	50

303Stainless steel characteristics：

Improved machinability over HuaNickel 304/304L and 316/316L stainless steels

Melt and process to maximize machinability

303Uses of stainless steel：

Conveyor systems

Automatic screw machinery

303Process performance：

Feed and speed:

tool	inch	velocity，sfpm**	Feed, inches/rev
Template Tools (Width)	1%	110	0.0026
	1%	105	0.0022
	1%	100	0.0019
Box Tool (Depth)	1%	115	0.0065
	1%	105	0.0060
	1%	100	0.0055
Torsion drill (diameter)	1%	65	0.0045
	1%	70	0.0050
	3%	75	0.0055
Resizer	½ and under	90	0.0055
	½ and under	90	0.0085
Finishing reamers	all	35	0.0035
Lap (Cut Thread)	–	15/30	–

Relevant standards：

ASTM: A 582, A 314, A 484 AMS: 5640