1. Strength from normal temperature to - 196 ℃ (design temperature).
2. It shall have enough toughness and plasticity within the service temperature range to avoid brittle failure.
3. Stable metallographic structure.
4. It has good processability and weldability.
5. Low price and easy to purchase.
6. Physical properties suitable for low temperature requirements
At present, the materials suitable for the construction of low-temperature storage tanks are mainly 9Ni steel, such as domestic 06ni9 steel, astma553typei and austenitic stainless steel 0Cr18Ni9Ti. The inner tanks of small and medium-sized LNG storage tanks are usually made of austenitic stainless steel, large and extra large.
