ERW tubes of cardan shafts
Standard:OD 76mm-140mm
Wall thickness 2.5mm-8.0mm
Inside diameter permit tolerance 71-124mm 0.2-0.3mm
Length 3.5-8.5mm
Dimensions and Tolerance :outside diameter 76-140mm
The height of inside flash -0.05+0.2mm
The degree of roundless ≤0.40mm
Mechanical Property:Grade B440QZR B480QZR QSTE500TM
Yield Strength ≥320 ≥355 ≥500MPa
Tensile Strength 440-570 480-580 550-700 MPa
Elongation ≥15 ≥21≥17
Chemical Composition（ ﹪）
Grade B440QZR ,B480QZR,QSTE500TM.
C ≤ O.12 ≤ 0.16 ≤0.12
Si ≤ O.50 ≤ 0.50 ≤0.50
Mn ≤ 1.70 ≤ 1.50 ≤1.30
S ≤ 0.025 ≤ 0.035 ≤0.025
P ≤ 0.030 ≤ 0.030 ≤0.030