ASTM A234 carbon steel cross tee is a four-port pipe fitting made of carbon steel, designed to connect four pipe sections and create branching in piping systems. Typically, two ports are aligned in a straight line (main line), while the other two ports are perpendicular to the main line (branch line).
Standard Specification
ASTM A234/A234M specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction. These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. The material for fittings shall consist of killed steel, forgings, bars, plates, seamless or fusion-welded tubular products with filler metal added. Forging or shaping operations may be performed by hammering, pressing, piercing, extruding, upsetting, rolling, bending, fusion welding, machining, or by a combination of two or more of these operations. The forming procedure shall be so applied that it will not produce injurious imperfections in the fittings. Fittings, after forming at an elevated temperature, shall be cooled to a temperature below the critical range under suitable conditions to prevent injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air. The fittings shall be subjected to tension test, hardness test, and hydrostatic test.
Chemical Composition (%) of ASTM A234/A234M Cross
|
Grade |
Type |
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 |
|
0.44-0.65 |
|
520-690 |
310 |
22 |
197 |
|
WP22 CL1 |
0.05-0.15 |
0.5 |
0.04 |
0.04 |
0.3-0.6 |
1.9-2.6 |
|
0.87-1.13 |
|
415-585 |
205 |
22 |
197 |
|
WP22 CL3 |
0.05-0.15 |
0.5 |
0.04 |
0.04 |
0.3-0.6 |
1.9-2.6 |
|
0.87-1.13 |
|
520-690 |
310 |
22 |
197 |
|
WP5 CL1 |
0.15 |
0.5 |
0.03 |
0.04 |
0.3-0.6 |
4-6 |
|
0.44-0.65 |
|
415-585 |
205 |
22 |
217 |
|
WP5 CL3 |
0.15 |
0.5 |
0.03 |
0.04 |
0.3-0.6 |
4-6 |
|
0.44-0.65 |
|
520-690 |
310 |
22 |
217 |
|
WP9 CL1 |
0.15 |
1 |
0.03 |
0.03 |
0.3-0.6 |
8-10 |
|
0.9-1.1 |
|
415-585 |
205 |
22 |
217 |
|
WP9 CL3 |
0.15 |
1 |
0.03 |
0.03 |
0.3-0.6 |
8-10 |
|
0.9-1.1 |
|
520-690 |
310 |
22 |
217 |
|
WPR |
0.2 |
|
0.05 |
0.045 |
0.4-1.06 |
|
1.6-2.24 |
|
|
435-605 |
315 |
22/28 |
217 |
|
WP91 |
0.08-0.12 |
0.2-0.5 |
0.01 |
0.02 |
0.3-0.6 |
8-9.5 |
0.4 |
0.85-1.05 |
See sdandard |
585-760 |
415 |
20 |
248 |
|
WP911 |
0.09-0.13 |
0.1-0.5 |
0.01 |
0.02 |
0.3-0.6 |
8.5-10.5 |
0.4 |
0.9-1.1 |
See sdandard |
620-840 |
440 |
20 |
248 |
Notes:
For each reduction of 0.01% below the specified C maximum, an increase of 0.06% Mn above the specified maximum will be permitted, up to a maximum of 1.35%.
The sum of Cu, Ni, Cr, and Mo shall not exceed 1.00%.
The sum of Cr and Mo shall not exceed 0.32%.
The maximum carbon equivalent (C.E.) shall be 0.50, based on heat analysis and the formula C.E.=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15.
Mechanical properties of ASTM A234 Cross
|
Tensile Requirements |
WPB |
WPC, WP11CL2 |
WP11CL1 |
WP11CL3 |
|
Tensile Strength, min, ksi[MPa] |
60-85 |
70-95 |
60-85 |
75-100 |
|
Yield Strength, min, ksi[MPa] |
32 |
40 |
30 |
45 |
GNEE ASTM A234 Cross for sale
