A178 J-525weld

A-178 Covers electric resistance welded tubes made of low-carbon steel and intended for use as boiler tubes and superheater flues. SAE J525 Standard covers normalized electric-resistance welded, cold-drawn, single-wall, low-carbon steel pressure tubing intended for use as pressure lines and in other applications requiring tubing of a quality suitable for bending, flaring, forming, and brazing.

Typical Chemical Properties
Carbon % 0.06 – 0.18
Manganese, % 0.27 – 0.63
Phosphorous, Max, % 0.035
Sulfur, Max, % 0.035
Typical Mechanical Properties
Tensile Strength Min 45 ksi (310 Mpa)
Yield Strength Min 24.6 ksi (170 Mpa)
Elongation Min 35%
Hardness Min 65 HRB
Typical Permissible Variations in Wall Thickness
All wall thickness +20% / 0%
Typical Permissible Variations in Outside Diameter
Outside Diameters Under 1.000" +0.004" / -0.004"
Outside Diameters 1.000" – 1.500" inclusive +0.006" / -0.006"
Outside Diameters 1.501" – 2.000" +0.008" / -0.008"
Outside Diameters 2.001" – 2.500" +0.010" / -0.010"
Outside Diameters 2.501" – 2.999" +0.012" / -0.012"
Outside Diameters 3.000" – 4.000" +0.015" / -0.015"

Information provided is “Typical” for specific requirements please inquire.