Stainless Steel Strips FREE CUTTING STAINLESS STEEL "SF20T"

Characteristics of "SF20T

Its corrosion resistance under normal atmosphere is equal to that of AISI303. In alloy composition, corrosion resistance of 20% Cr + 2% Mo steel is equivalent to that of 18%Cr + 8%Ni steel.

Its machinability is the best among all stainless steel varieties and almost equal to that of free cutting steel AISI12L14.

(1)	Tellurium (Te) is added to reduce the cutting resistance and to improve the tool life much more, by spheroidizing the conventional non-metallic inclusions.
(2)	Carbon(C) is severely controlled under 0.03% to suppress the formation of hard chromium carbides.

Cold formability such as heading and caulking is superior to that of AISI303.

Microstructure(?2.30 Product)

?mPhoto-1?nTransverse section (X200)	[Photo-2] Longitudinal section (x200)

Grains show fine, of its grain size under 7.5 in JMS G 0552

Two levels of hardness are available as standard

Representative hardness (HV)	Priority in choice
260	Strength
240	Machinability

Characteristics of tips made of SF20T

(1)

Its durability in writing is far superior to those of brass (Cu+Zn) and nickel silver (Cu+Ni+Zn), normally from 1000 to 2000 meters in continuous line.

(2)

Smooth writing without scratching and bleeding, can be obtained to end.

(3)

Machining data ( Example )

	Back-drilling	Front-drilling
Ball-point pen	Roller pen	Front-drilling
Drill	Shape	Twist Drill	Gun barrel drill
Materia	High speed steel of hard metal	Hard metal	Hard metal
Point angle	118 Standard Type
Helix angle	30-35 Standard Type	-
Machining Condition	Revolution	7000-15000 rpm	10000-15000 rpm
Feed speed	0.01-0.02mm/rev	-
Cutting oil	Low viscosity oil or oil which is effective even at low temp maching are advisable.
Tool life	In case of hard metal, 1 to 2 million pieces.	In case of inserted felt-type, approx. 0.5 mil. pieces.	0.3 to 0.5 mil. pieces.

[ Points for better disposal of chips ]
To produce smaller chips.

To choose the matching condition which suppresses built-up edge.
To choose cutting oil of low viscosity and to control its flow rate and spout angle, so that chips can be easily ejected, subsequently works can be entirely cleaned by ultrasonic wave
(Note: In choice of cutting oil, chlorine concentration should be taken into consideration to avoid environmental problems such as skin poisoning.)

Available Sizes

1.60mm DIA	1.92mm DIA	2.00mmDIA	2.25mmDIA	2.30mm DIA	2.50mm DIA
2.52mm DIA	2.54mm DIA	2.56mm DIA	2.70mm DIA	3.20mm DIA

Country:Japan
telephone:81-03-3862-3301

Characteristics of "SF20T 1.
Its corrosion resistance under normal atmosphere is equal to that of AISI303

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Stainless Steel Strips FREE CUTTING STAINLESS STEEL "SF20T"

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