500/7 SG / BS2789
500/7 SG
BS2789
General
BS2789 GRADE 500-7, SOMETIMES REFERRED TO AS DUCTILE IRON, IS A SPHEROIDAL GRAPHITE (SG) IRON KNOWN FOR ITS SUPERIOR STRENGTH, WEAR RESISTANCE, AND HARDENING CAPABILITIES COMPARED TO GRADES SUCH AS 400-15 OR 420-12. THE PRESENCE OF ROUNDED GRAPHITE NODULES IN THE MICROSTRUCTURE ENHANCES DUCTILITY AND HELPS INHIBIT CRACK FORMATION. AS A RESULT, SG IRON LIKE EN-GJS-500-7 DEMONSTRATES SIGNIFICANTLY IMPROVED FATIGUE AND IMPACT RESISTANCE WHEN COMPARED TO TRADITIONAL GREY CAST IRON.
Uses
COUNTERWEIGHTS, CRANE BALLS, PISTONS, GEARS, STOVE PARTS, HANDWHEELS, BELT PULLEYS, PUMP BODIES.
Heat Treatment & Condition
-
Chemical Analysis
C
·
3.40/3.85
Mn
·
0.10-0.30
P
·
0.10 MAX
Si
·
2.30/3.10
S
·
0.02 MAX
Mg
·
0.07 MAX
| C | Mn | P | Si | S | Mg |
|---|---|---|---|---|---|
| 3.40/3.85 | 0.10-0.30 | 0.10 MAX | 2.30/3.10 | 0.02 MAX | 0.07 MAX |
Typical Mechanical Properties (EXAMPLE ONLY)
TEN. STRENTH
500 MPa
ELONG.
7%
HARDNESS
170-235 HB
| TEN. STRENTH | ELONG. | HARDNESS |
|---|---|---|
| 500 MPa | 7% | 170-235 HB |