301 Stainless Steel

Stainless steel grade 301 is a commonly available austenitic stainless with good corrosion resistance and elevated carbon to allow for cold working to a variety of tempers. It can be obtained in the 1/4 hard, 1/2 hard, and full hard.

Specifications: S30100

Applications:

High strength and excellent corrosion resistance make Type 301 Stainless Steel useful for a wide variety of applications. Typical uses include:

• aircraft structural parts
• trailer bodies
• utensils
• architectural and automotive rim
• roof drainage products
• conveyor belts
• variety of industrial applications.

Standards:

• ASTM/ASME: UNS S30200
• EURONORM: X 12 CrNi 17 7
• DIN: 1.4310

Corrosion Resistance

• Good resistance in applications involving external exposure to mildly corrosive conditions at ambient temperatures.
•  Resists outdoor, industrial, marine, and mild chemical environments
• susceptible to carbide precipitation during welding, which restricts its use in some applications
• Similar to resistance of Stainless Steel grade 304

 Heat Resistance

• Can be exposed continuously without appreciable scaling to a max of  1600°F(871°C).
• Maximum exposure temperature is about 1450°F (788°C), for intermittent exposure
• Has an oxidation weight gain of 10mg/cm 2 in 1,000 hours, in temperatures over 1600°F (871°C).

Heat Treatment

• Solution Treatment (Annealing) – Heat to 1010-1120°C and cool rapidly.
• Use low side of range for intermediate annealing.
• This grade cannot be hardened by thermal treatment.

 Cold Working

• hardens at high rate, creating a very high strength from cold rolling and from roll forming.
• more difficult to work than other austenitic stainless steels, due to its high work hardening rate.
• strain-hardened austenitite steel undergoes partial transformation into martensitite steel during this process.
• severe cold deformation can still occur, due to residual ductility.
• Grade 301 becomes strongly magnetic when cold rolled

 Welding

•  must be annealed for maximum corrosion resistance
• material will lose temper in the heat affected weld zone.
• Welding and post weld annealing will both remove high strength induced by prior cold rolling.
• Spot welding is commonly used to assemble cold rolled 301 components.

Chemical Properties:

%		Cr	Ni	C	Si	Mn	P	S	N
301	Min:	16	6	–	–	–	–	–	–
	Max:	18	8	0.15	1.00	2.0	0.045	0.030	0.10

Mechanical Properties:

Grade/Temper	Tensile Strength ksi (min.)	Yield Strength 0.2% ksi (min.)	Elongation -% in 50 mm (min.)
301 1/4	125	75	25
301 1/2	150	110	18
301 Full Hard	185	140	9

Physical Properties:

Denstiy lbm/in3	Coefficient of Thermal Expansion (min/in)-°F			Electrical Resistivity mW-in						Thermal Conductivity BTU/hr-ft-°F	Melting Range
0.29	at 68 – 212°F	at 68 – 932°F	at 68 – 1450°F	at 68°F	at 212°F	at 392°F	at 752°F	at 1112°F	at 1472°F	at 68 – 212°F	2550-2590°F
	9.2	10.4	10.9	28.3	30.7	33.8	39.4	43.7	47.6	9.4

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