303
303
General
GRADE 303 (1.4305) IS THE MOST READILY MACHINABLE AUSTENITIC STAINLESS STEEL, MADE SO BY THE ADDITION OF SULPHUR. THIS IMPROVES MACHINABILITY BUT SLIGHTLY REDUCES CORROSION RESISTANCE AND TOUGHNESS COMPARED TO GRADE 304. DESPITE THIS, 303 STILL OFFERS EXCELLENT TOUGHNESS AND GOOD CORROSION RESISTANCE FOR MOST GENERAL APPLICATIONS. IT IS IDEAL FOR COMPONENTS REQUIRING EXTENSIVE MACHINING.
Uses
NUTS & BOLTS, BUSHINGS, SCREWS, AIRCRAFT FITTINGS, SHAFTS & GEARS.
Heat Treatment & Condition
CONDITION A
Chemical Analysis
C
·
0.10 MAX
Cr
·
17.00/19.00
Si
·
1.00 max
Mn
·
2.00 max
S
·
0.150/0.350
P
·
0.05 MAX
Ni
·
8.00/10.00
Cu
·
1.00 MAX
| C | Cr | Si | Mn | S | P | Ni | Cu |
|---|---|---|---|---|---|---|---|
| 0.10 MAX | 17.00/19.00 | 1.00 max | 2.00 max | 0.150/0.350 | 0.05 MAX | 8.00/10.00 | 1.00 MAX |
Typical Mechanical Properties (EXAMPLE ONLY)
PROOF STRESS
190 MIN MPa
TEN. STRENTH
500-750 MPa
ELONG. A5
35%
HARDNESS
230 MAX HB
| PROOF STRESS | TEN. STRENTH | ELONG. A5 | HARDNESS |
|---|---|---|---|
| 190 MIN MPa | 500-750 MPa | 35% | 230 MAX HB |