CAST IRON GG-25 GRADE : MATERIAL CHEMICAL COMPOSITION
| Material |
Percentage (%) |
| C |
3.0 to 3.90% |
| Si |
2.0 to 2.90 % |
| Mn |
0.60 to 0.70 % |
| Cr |
0.30 %Max |
| Cu |
Max 0.50% |
| Sn |
0.10% |
| S |
0.15%Max |
| P |
0.40 to 0.70 % |
| Fe |
Balance |
| HARDNESS |
190-240BHN |
BRASS VALVE GUIDES: MATERIAL CHEMICAL COMPOSITION
| Material |
Percentage (%) |
| Cu |
56.0 to 58.0% |
| Pb(Led) |
2.0 to 3.4% |
| Sn(Tin) |
TR |
| Fe(Iron) |
0.35 %Max |
| Cu |
Max 0.50% |
| Al |
TR |
| Ni |
TR |
| Mn |
TR |
| Total impurities |
0.70 % |
ALUMINUM BRONZE VALVE GUIDES: MATERIAL CHEMICAL COMPOSITION
| Material |
Percentage (%) |
| Cu |
57.0 to 60.0% |
| Pb(Led) |
0.30 to 0.60% |
| Fe |
0.25 %Max |
| Ai |
1.50 to 2.0 % |
| Mn |
2.0 to 4.0 % |
| Si |
0.60 to 0.90 % |
| Total impurities |
0.40% Max |
| HARDNESS |
150 to 210BHN |
