Awọn eroja ti o wọpọ kọja gbogbo awọn irin 440:
- 16-18% chromium
- 1% manganese
- 1% ohun alumọni
- 0,75% Molybdenum
- 0,04% irawọ owurọ
- 0,03% efin
- Diẹ ninu ogorun Erogba
440A irin
- 0,6-0,75% Erogba
440B irin
- 0,75-0,95% Erogba
440C irin
- 0,95-1,20% Erogba
Akoko ifiweranṣẹ: Oṣu kọkanla-25-2020