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STAINLESS STEEL PRODEC 303Download

PRODEC® 303 is a fully resulfurized free-machining austenitic stainless steel melted and processed to maximize machinability. It should be considered for automatic screw machines where extensive machining is required. PRODEC®303 is nonmagnetic in the annealed condition but may become slightly magnetic as a result of cold working.

PRODEC®303 is resistant to mildly corrosive atmospheres but is inferior to 304 because of the high sulfur content. For optimum corrosion resistance, it is recommended that PRODEC®303 be chemically treated to remove sulfides from the final surface of the parts.

The high sulfur content, added for machinability, is detrimental to hot workability. If hot forming is necessary, PRODEC®304 or an intermediate sulfur level should be considered. When forging is necessary, it should be done in the 1800-2200°F range, and should be followed by annealing at 1900°F minimum and water quenching or rapid cooling by other means.The cold formability of PRODEC®303 is limited by the sulfur content. Bending with a generous bend radius may be considered for PRODEC®303. When cold forming is required, PRODEC®304 should be considered.

PRODEC®303 is not recommended for applications requiring welding. The high sulfur level in PRODEC®303 makes it prone to weld solidification cracking. If welding is necessary, AWS E312 filler metal may be considered.

PRODEC®303 is easily machined and produces small brittle chips. PRODEC®303 may be machined at high speeds with deep cuts and heavy feeds on powerful, rigid equipment using good lubricants and sharp tooling.

Chemistry

 

Cr

Ni

C

Mn

P

S

Si

Fe

MIN

17.0

8.0

-

-

-

0.3

-

-

MAX

19.0

10.0

0.15

2.0

0.2

-

1.0

Balance

Prodec®303 contains 0.30% minimum sulfur for enhanced machinability, substantially higher than the 0.15% minimum required by ASTM

Specifications

AMS 5640AMS 5640R
UNS S30300Werkstoff 1.4305

Inventory

PRODEC®303 Hex Bar, PRODEC®303 Round Bar

Features

· Melted and processed to maximize machinability

· Improved machinability over 304/304L and 316/316L

Applications

· Automatic screw machines

Physical Properties

Density: 0.285 lb/inch3 
Modulus of Elasticity: 29 x 106 psi 
Linear Expansion 60-212°F: 9.4 x 10-6/°F
Thermal Conductivity: 8.7 Btu/ft hr °F
Heat Capacity: 0.12 Btu/lb °F
Electrical Resistivity: 27.6 Ω in x 10-6

Mechanical Properties

Typical Tensile Properties

 

Tensile Strength, ksi

90

Yield Strength, ksi

43

% Elonation in 2 inches

55

% Reduction of area

60

Hardness, HB

180

Machining

High Speed Tooling

 

Turning

Cut-Off

Forming

Drilling

Reaming

End Milling

Tapping

Threading

Depth/Width, (dia/in)

0.005-0.200
0.002-0.004

1/16
1/4

1
2

1/4
1/2
1-2

1/4
1-2

0.050-1/2
0.050-1/2

7 threads
per inch

25 threads
per inch

Speed, (sfm)

115-130
135-180

90-120
100-130

100-130
90-120

70-80
85-95
100-110

90-110
90-110

130-160
130-160

10-115

40-50

Feed, (in/rev)

0.015-0.02
0.005-0.01

0.0015-0.002
0.0025-0.003

0.0020
0.0015

0.007
0.012
0.020

0.006
0.025

0.003
0.006

-

-

Carbide Tooling

 

Turning

Cut-Off

Forming

Drilling

Reaming

End Milling

Tapping

Threading

Depth/Width, (dia/in)

0.005-0.200
0.002-0.004

1/16
1/4

1
2

1/4
1/2
1-2

1/4
1-2

0.050-1/2
0.050-1/2

7 threads
per inch

25 threads
per inch

Speed, (sfm)

375-700
600-900

275-400
325-450

375-425
350-400

700
800

-
-

300-450
360-500

-

-

Feed, (in/rev)

0.025-0.030
0.007-0.010

0.002-0.004
0.004-0.008

0.003-0.006
0.002-0.004

0.005
0.007

 

0.004
0.008

-

-