440A, 440B, 440C

Waxyaabaha caadiga ah ee dhammaan 440 birta:

• 16-18% chromium
• 1% manganese
• 1% silicon
• 0.75% Molybdenum
• 0.04% Fosfooraska
• 0.03% baaruud
• Boqolkiiba kaarboon

440A bir ah

• 0.6-0.75% Kaarboon

440B bir ah

• 0.75-0.95% Kaarboon

440C bir ah

• 0.95-1.20% Kaarboon