440A, 440B, 440C

Ihe ndị a na-ahụkarị n'ofe nchara 440 niile:

• 16-18% chromium
• 1% manganese
• 1% silicon
• 0.75% molybdenum
• 0.04% nke phosphorus
• 0.03% sọlfọ
• Pasent ụfọdụ nke Carbon

440A ígwè

• 0.6-0.75% Carbon

440B ígwè

• 0.75-0.95% Carbon

440C ígwè

• 0.95-1.20% Carbon