1" 45° Elbow Long Radius ASME B16.9 BW WROUGHT-S ASTM A 234 GR. WPB GA-E-60112

ASTM A234 WPB steel pipe fitting chemical and mechanical features

Grade WPB fittings made from the steel pipes or plates maximum C is 0.35%.

Forging fittings Carbon content 0.35% maximum and Silicon content 0.35% maximum, no minimum.

For each reduce of 0.01 of Carbon content, Manganese maximum content increase 0.06%, up to the maximum 1.35% for Mn.

Copper, Nickel, Niobium and Molybdenum sum content shall not exceed 1.00%.

Niobium + Molybdenum shall not exceed 0.32%.

For other grades:

Mechanical properties of ASTM A234 WPB pipe fittings

Tensile Strength 60,000 pis 415 Mpa
Yield Strength 35,000 psi 240 Mpa
Pressures Ratings: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2000 LBS, 3000 LBS to 9000 LBS.

For other grades in ASTM A234:

ASTM A234 includes seamless and welded pipe fittings

For the seamless steel pipe fittings refers to the fittings raw material from the seamless steel pipes and tubes;
Thus the welded steel pipe fittings covers the fittings raw material from welded steel pipes.

It shall be noted that,

ASTM A234 specification does not cover cast welding fittings or fittings machined from castings.

Steel pipe fittings manufacturing forming processes

The manufacturing processes for pipe fittings includes forging and shaping operations. As well as pressing, hammering, piercing, extruding, upsetting, rolling, bending, fusion welding and machining. Or the processes of combination of two or more of these operations.

During the manufacturing steel pipe fittings, below activities shall be noted:

1, Injurious imperfections, welding defects shall be not created.
2, After shaping or forming the fittings in a suitable temperature, it shall be cooled in a appropriate environments to a temperature that below the critical range. And no defects shall be made during the cooling procedures. The cooling rapid shall be not more than in the air.
3, Suitable inspection shall be performed after manufacturing. (Hydrostatic test, hardness test, tensile test etc)