hi this mild steel safety door with red oxside.

 
Additional Information:
Production Capacity: 2000 PIDCE
Delivery Time: 4 to 7 days
MS” stands for mild steel, which is a common and cost-effective steel grade used for doors.
Make sure the frame and door leaf are robust — a quality supplier will show welds, reinforcements, adequate sheet thickness, etc. For example, one product listing describes an MS safety door as “sturdy and secure mild steel protective doors … applied in residential houses … provide security.
Finish surface treatment: Because you are in a humid/coastal region (Maharashtra), rust-resistance is especially important. The door should ideally have a primer (often red-oxide primer) + enamel/powder coating to protect the steel. For instance, one listing mentions “material: mild steel … thickness: 5.5 cm - 7.5 cm” for MS safety door made in Mumbai.