Special Steel Pipe

UNS N06690

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1.standard: asme B167

2.chemical Composition (%)

Elements C Mn P S Si Cr Mo Ni Ti Nb Cu Fe Al
Min 27.0 58.0 7.0
Max 0.05 0.5 0.015 0.5 31.0 0.5 11.0
actual value 0.02 0.09 0.003 0.35 30.5 62.0 0.1 10.5

3.mechanical Properties

OD Mechanical properties

MPa

 Tensile strength

MPa

 Yield Strengtr

MPa

 Elongatian %
OD≤127mm Min 586 240 30
Max
Actual value 603 267 42
OD≥127mm Min 586 205 35
Max
Actual value 595 232 51

4.Typical size

Size
mm		 Outside Diamete
mm		 tolerance of Outside
Lnameter
mm		 wall thickness
mm		 Tolerance of Wall Thickness mm
14.3*4 14.3 ±0.51 4 ±12.5%

Note:Standard requirements control range:OD:±0.515 mm WT:±12.5%

5.Typical Application Environment

1)steam generator used in pressurized water reactor

2)Military  thermal  components

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