ASTM A53 carbon steel pipe covers seamless, welded, black, and hot-dipped galvanized pipe.
ASTM A53 GRADE A&B
This specification covers seamless and welded black and hot-dipped galvanized steel pipe in nominal size 1/8” in. To 20 in. Inclusive (3.18mm-660.4mm) with nominal (average) wall thickness .
ASTM A106 GRADES A, B & C
This specification covers seamless carbon steel pipe for high temperature service in nominal size 1/8 in. To 26 in. Inclusive (3.18mm-660.4mm)with nominal (average) wall thickness .
Grade A Carbon 0.25% max. Manganese 0.27 to 0.93%
Grade B Carbon 0.30% max. Manganese 0.29 to 1.06%
Grade C Carbon 0.35% max. Manganese 0.29 to 1.06%
All grades have same values for Sulphur 0.058% max. Phosphorus 0.048% max. Silicon 0.20% min.