Pipe Matrial ASTM A 209 / A 209 M-98
alloy steels According to ASTM Code

This specification covers several grades of minimum wall thickness, seamless, carbon-molybdenum alloy steel, boiler and superheater tubes.

SIZE RANGE

Outside diameter : 1/2 to 5 in. (12.7 to 127 mm) .
Minimum wall thickness : 0.035 to 0.500 in. (0.9 to 12.7 mm).

MANUFACTURE

The steel shall be killed.
The tubes shall be made by the seamless process and shall be either hot finished or cold-finished as specified.
All tubes shall be heat treated.

CHEMICAL REQUIREMENTS

Grade Designatio UNSCarbonManganesePhosphorusSulfurSiliconMolybdenum
 %%maxi %maxi %%%
              
T1 0.10 / 0.200.30 / 0.800.0250.0250.10 / 0.500.44 / 0.65
T1a 0.15 / 0.250.30 / 0.800.0250.0250.10 / 0.500.44 / 0.65
T1b 0.14 maxi0.30 / 0.800.0250.0250.10 / 0.500.44 / 0.65

TENSILE REQUIREMENTS

Grade Tensile strength miniYield strength miniElongation mini in 2 in. or 50 mmHardness maxi
 ksiMPaksiMPa%BrinellRockwell
          
T1 553803020530146 HB80 HRB
T1a 604153222030153 HB81 HRB
T1b 533652819530137 HB77 HRB

 

GENERAL REQUIREMENTS

To specification ASTM A 450 / A 450 M-96a.

 

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