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a234 wpb steel pipe fittings mean the pipe fitting which material is astm a234 wpb,they are used for the pressure piping systems of moderate and high temperature services. astm a234 is the standard of pipe fittings material,it indicates the materials properties of different kinds of carbon steel and alloy steel,wpb is one of the steel grade in this standard. w means weldable,p means pressure, b is grade b, refer to the minimum yield strength,like the astm a106 a53,gr.b or api 5l gr.b.a234 wpb is the most common carbon steel pipe fittings material.
w = weldable / wrought
p = related to p number of alloy material
b = refer to minimum yield of material
chemical composition (%) of astm a234/a234m fittings
grade | type | chemical composition (%) | ||||||||||||
c | si | s | p | mn | cr | ni | mo | other | ób | ós | δ5 | |||
wpb | 0.3 | 0.1min | 0.058 | 0.05 | 0.29-1.06 | 0.4 | 0.4 | 0.15 | v:0.06;nb:0.02 | 415-585 | 240 | 22 | 197 | |
wpc | 0.35 | 0.1min | 0.058 | 0.05 | 0.29-1.06 | 0.4 | 0.4 | 0.15 | v:0.06;nb:0.02 | 485-655 | 275 | 22 | 197 | |
wp1 | 0.28 | 0.1-0.5 | 0.045 | 0.045 | 0.3-0.9 | 0.44-0.65 | 380-550 | 205 | 22 | 197 | ||||
wp12 cl1 | 0.05-0.2 | 0.6 | 0.045 | 0.045 | 0.3-0.8 | 0.8-1.25 | 0.44-0.65 | 415-585 | 220 | 22 | 197 | |||
wp12 cl2 | 0.05-0.2 | 0.6 | 0.045 | 0.045 | 0.3-0.8 | 0.8-1.25 | 0.44-0.65 | 485-655 | 275 | 22 | 197 | |||
wp11 cl1 | 0.05-0.15 | 0.5-1 | 0.03 | 0.03 | 0.3-0.6 | 1-1.5 | 0.44-0.65 | 415-585 | 205 | 22 | 197 | |||
wp11 cl2 | 0.05-0.2 | 0.5-1 | 0.04 | 0.04 | 0.3-0.8 | 1-1.5 | 0.44-0.65 | 485-655 | 275 | 22 | 197 | |||
wp11 cl3 | 0.05-0.2 | 0.5-1 | 0.04 | 0.04 | 0.3-0.8 | 1-1.5 |
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