» Products » ASTM A234 WP5 Butt Weld Fittings

ASTM A234 WP5 Butt Weld Fittings

ASME B16.9 4" SCH40 180° return, short radius (S/R); made from ASTM A234 Gr. WP5 Class 1; supplied to a petrochemical project in Abu Dhabi, UAE.

  • Description

Butt welding pipe fittings made from ASTM A234 Gr. WP5 can be furnished in a series of product types: elbow, bend, return, tee, reducer, and cap, etc. The nominal composition is 5Cr-0.5Mo. These fittings are widely used for petrochemical and power steam piping. There are two classes of ASTM A234 WP5: Class 1 and Class 3, which differentiates from each other in tensile properties.

Chemical Composition Requirements

ElementComposition, %
C≤0.15
Mn0.30-0.60
P≤0.040
S≤0.030
Si≤0.50
Cr4.0-6.0
Mo0.44-0.65
*Based on heat analysis and for both Class 1 and Class 3 of ASTM A234 WP5.

Mechanical Properties

Tensile & HardnessRequirements
for Class 1
Requirements
for Class 3
Tensile Strength
min. ksi [MPa]
60 [415]75 [520]
Yield Strength
min. ksi [MPa]
30 [205] 45 [310]
Elongation
in 2", min. %
Longitudinal
3030
Elongation
in 2", min. %
Transverse
2020
Hardness
max. HBW
217217
*The tensile & hardness requirements for pipe fittings made of ASTM A234 WP5 Class 1 and Class 3.

Heat Treatments

Generally, fittings made from ASTM A234 WP5 Class 1 shall be furnished in annealed condition with the minimum austenitizing temperature of 1750°F [955°C]. The full annealing may result in good ductility but lower strength. Fittings made from ASTM A234 WP5 Class 3 are usually furnished in normalized+tempered condition. The tempering temperature shall not be less than 1250°F [675°C].

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