301 Stainless steel 1.4310 (UNS S30100)

What is stainless steel 301 (UNS S30100)1.4310?

SS 301 is an austenitic Chromium-Nickel stainless steel capable of attaining high strength with moderate cold working. The combination of high strength and good ductility makes it suitable for numerous mechanical switches as well as surgical instruments, metal stampings and electronic and computer spring components..

The alloy is readily formed in the annealed temper. Ductility decreases with increased cold rolled strength but not to the degree that would occur with SS 302. It is not recommended for deep drawing. SS 301 can be welded by all conventional processed except oxy-acetylene. The weld should not make contact with electrolytes to prevent intergranular corrosion. SS 301 is resistant to atmospheric corrosion and is additionally resistant to mildly corrosive mediums. The combination of narrow strength bands and close thickness tolerance provided by Hamilton Precision Metals is the key to repeatable response characteristic in spring and switch applications.

301 stainless steel 1.4310  Products Form

SLIT COIL PRODUCTS

• 301 Stainless Steel Strip (301 ss slit coil)
• 301 Stainless Steel Foil
• 301 Stainless Steel Ribbon

WIRE PRODUCTS

• 301 Stainless Steel Shaped Wire (Custom Profile Wire)
• 301 Stainless Steel Round Wire
• 301 Stainless Steel Flat Wire
• 301 Stainless Steel Square Wire

Applications for301 stainless steel

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.

Equivalents of grade 301

EU EN	USA –	Germany DIN,WNr	Japan JIS	France AFNOR	England BS	Sweden SS	Inter ISO
X10CrNi18-8	301	X12CrNi17-7	SUS301	Z11CN18-08Z12CN18-09	301S21302S26	2331	X9CrNi18-8

Composition  for 301 grade of stainless steel

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
301ASTM A666	min.max.	-0.15	-2.0	-1.0	-0.045	-0.030	16.018.0	–	6.08.0	-0.10
301LJIS G4305	min.max.	-0.03	-2.0	-1.0	-0.045	-0.030	16.018.0	–	6.08.0	-0.20
1.4318/301LNEN 10088-2	min.max.	-0.03	-2.0	-1.0	-0.045	-0.015	16.518.5	–	6.08.0	0.100.20

Mechanical Properties 

Grade 301 Temper ASTM A666	Tensile Strength (MPa) min.	Yield Strength 0.2% Proof (MPa) min.	Elongation (% in 50mm) (thick.>0.76mm) min.	Bend Test (thickness > 1.27mm)
				Bend Angle (°)	Factor
Annealed	758	276	60	–	–
1/16 Hard	620	310	40	180	1
1/8 Hard	690	380	40	180	1
1/4 Hard	862	514	25	90	2
1/2 Hard	1034	758	18	90	2
3/4 Hard	1205	930	12	90	3
Full Hard	1276	965	9	90	5

Physical Properties

SS 301 PHYSICAL PROPERTIES
Density	0.287 lbs.cu.in.
Melting Point (Approx.)	1400°C
Electrical Resistivity @ R.T.	72 Microhm·cm
Thermal Expansion Coefficient (0° to 100°C)	16.9 x 10-6/°C
Thermal Conductivity @ 100°C	16.3 W/m·K
Magnetic Attraction Annealed Cold Rolled	None Yes

 

Formability

Type 301 can be readily formed and drawn. Due to its high workhardening rate, intermediate annealing may be necessary for severe drawing and forming operations. Type 301 may not be suitable in certain severe forming applications where multiple forming operations are required.

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

301 stainless steel can be improved through heat treatment processes such as stress relieving or annealing. These processes help to improve the hardness and strength of the material while also reducing any internal stresses which could lead to warping or cracking during machining operations. Additionally, cold working processes can be used to further improve the performance characteristics such as formability or ductility without having to compromise on the strength or hardness qualities that make this type of steel so popular in industrial settings.

Cold Working

Stainless steel grade 301 and low carbon variants of this grade are predominantly used as high strength stainless steel. The work hardening rates of these grades are very high, in the range of a 14MPa increase per 1% reduction in area of cold work. As a result of this characteristic high strength can be achieved from cold rolling and roll forming operations.

Through such forming methods strain hardened austenite may be partially transformed to martensite. In spite of achieving such high strengths, the residual ductility in the alloy is capable of causing severe cold deformation. The alloy is non-magnetic in the annealed condition, but shows strong magnetism when cold worked.

Welding

Stainless steel grade 301 is suitable for all forms of standard welding methods. The use of grade 308L as filler metal is recommended. Welded parts in grade 301 must be subjected to annealing in order to attain maximum corrosion resistance. For grades 301L and 301LN annealing is not necessary after welding. The purpose of welding followed by annealing is to remove the high strength brought about by cold rolling.

The process of spot welding is used to assemble the cold rolled 301 components; this rapid welding technique does not hamper the overall strength of the component.