A178
Standard Specification for Electric-Resistance-Welded Carbon Steel and Carbon- Manganese Steel Boiler and Superheater Tubes
1, Chemical composition:
A C D
Carbon 0.06-0.18 0.35Max 0.27Max
Manganese 0.27-0.63 0.8Max 1.00-1.50
Phosphorus, max 0.035 0.035 0.030
Sulfur, max 0.035 0.035 0.015
Silicon .... ...... 0.10Min
A192 Standard Specification for Seamless Carbon Steel Boiler Tubes for High-Pressure Service
1, Chemical composition:
Carbon, %0.06--0.18
Manganese, %0.27--0.63
Phosphorus, max, %0.035
Sulfur, max, %0.035
Silicon, max, %0.25
A210Standard Specification for Seamless Medium-Carbon Steel Boiler and SuperheaterTubes1
1, Chemical composition:
A-1 C
Carbon Max 0.27 0.35
Manganese 0.93Max 0.29-1.06
Phosphorus, max 0.035 0.035
Sulfur, max 0.035 0.035
Silicon 0.10Min 0.10 Min