440A, 440B, 440C

Elemene masani i u'amea uma e 440:

• 16-18% chromium
• 1% Manganese
• 1% silikoni
• 0.75% Molybdenum
• 0.04% Phosphorus
• 0.03% sulfur
• O nisi pasene o Carbon

440A uamea

• 0.6-0.75% Carbon

440B uamea

• 0.75-0.95% Carbon

440C uamea

• 0.95-1.20% Carbon