ASTM A213 T5b Seamless Alloy Tube

Standard & Grade

• Standard: ASTM A213 / ASME SA213
• Grade: T5b
• Product type: Seamless ferritic chrome-moly alloy steel tube

Applications

• Boilers
• Superheaters
• Heat exchangers
• High-temperature industrial piping systems

Manufacturing

• Manufactured by the seamless process
• Supplied hot finished or cold finished, as specified

Heat Treatment / Delivery Condition

• Heat treatment performed separately in addition to hot forming
• Ferritic alloy steels reheated as required by ASTM A213
• Typical delivery conditions:
  • Full annealed
  • Isothermal annealed
  • Normalized, quenched and tempered

Testing & Inspection

• Tension test
• Hardness test
• Flattening test
• Flaring test
• Each tube subjected to non-destructive electric testing or hydrostatic testing

Chemical Composition (%)

• UNS Designation: K41545
• Carbon: 0.15
• Manganese: 0.30 – 0.60
• Phosphorus: 0.025
• Sulfur: 0.025
• Silicon: 1.00 – 2.00
• Chromium: 4.00 – 6.00
• Molybdenum: 0.45 – 0.65

Mechanical Properties

• Tensile strength (min): 415 MPa
• Yield strength (min): 205 MPa
• Elongation: 30%
• Hardness: HB 179 max

Outside Diameter Tolerances

• OD 10.29 – 48.3 mm: ±0.4 mm
• OD >48.3 – 114.3 mm: ±0.79 mm
• OD >114.3 – 219.1 mm: +1.59 / -0.79 mm
• OD >219.1 – 323.9 mm: +2.38 / -0.79 mm
• OD >323.9 mm: ±1%

Equivalent Designations

• ASTM A213 T5b / ASME SA213 T5b
• EN: X11CrMo5 (EN 10216-2)
• UNI: 17102

Dimensional Scope (ASTM A213)

• Inside Diameter: from 1/8 in. (3.2 mm)
• Outside Diameter: up to 5 in. (127 mm)
• Wall Thickness: 0.015 – 0.500 in. (0.4 – 12.7 mm)
• Other sizes available on request