Seamless Tubes for Fertilizer Equipment

Specification: API SPEC 5L, GB/T9711
Applications: Primary uses of this series of seamless tube are in the fertilizer equipment, though some tubes can also be used in the oil and natural gas industry, where they are employed to transfer oxygen, water, and oil.
Material: GR.B, X42, X52, X60, X65, X70

Chemical Composition
Steel Tube Types Outside Diameter (D) Wall Thickness (S)
Tube Body Outside Diameter (mm) Diameter Thickness (mm) Outside Diameter (mm) Diameter Tolerance (mm)
≥60.3 and S <20 ±0.75 % ≤73.0 +15 %,-12.5 %
≥60.3 and S ≥20 ±1.00 % >73.0 and S <20 +15 %,-12.5 %
>73.0 and S ≥20 +17.5 %,-10 %
Physical Performance
Specification Grade Tensile Strength (MPa ) Yield Strength (MPa ) Yield Ratio Percentage Elongate (%) Impact Energy at 0°C
Akv (J )
Heat Treatment
API SPEC 5L GB/T9711.2 B ≥415 245~440 ≤0.80 22 ≥40 Normalizing
X42 ≥415 290~440 ≤0.80 21 ≥40 Normalizing
X52 ≥460 360~510 ≤0.85 20 ≥40 Normalizing
X60 ≥520 415~565 ≤0.85 18 ≥40 Normalizing
X65 ≥535 450~570 ≤0.90 18 ≥40 Quenching +Tempering
X70 ≥570 485~605 ≤0.90 18 ≥40 Quenching +Tempering
Chemical Composition
Specification Grade Chemical Composition (%) CEV (%)
C Si Mn P S V Nb Ti
API SPEC 5L GB/T9711.2 B ≤0.16 ≤0.40 ≤1.10 ≤0.020 ≤0.010 - - - ≤0.42
X42 ≤0.17 ≤0.40 ≤1.20 ≤0.020 ≤0.010 ≤0.05 ≤0.05 ≤0.04 ≤0.42
X52 ≤0.20 ≤0.45 ≤1.60 ≤0.020 ≤0.010 ≤0.10 ≤0.05 ≤0.04 ≤0.45
X60 ≤0.21 ≤0.45 ≤1.60 ≤0.020 ≤0.010 ≤0.15 ≤0.05 ≤0.04 According to the agreement
X65 ≤0.16 ≤0.45 ≤1.60 ≤0.020 ≤0.010 ≤0.06 ≤0.05 ≤0.06 ≤0.45
X70 ≤0.16 ≤0.45 ≤1.70 ≤0.020 ≤0.010 ≤0.06 ≤0.05 ≤0.06 ≤0.45