OUR PRODUCTS

Standard: GB3087-1999, ASTM A179, ASTM A106, JIS G3454, SA-213, SA-179

Application: Used for manufacturing superheated pipelines, the steam pipe, boiling water tube, flue tube, small flue tube, etc.of low, mediam pressure boiler, the general industry boiler

Out Diameter Torlerances

Standard Out Diameter Tolerance
GB3087 ≤180 ±1.0%(min: ±0.5mm)
GB5310 ≤50 ±0.5mm
>50 ±1.0%

Wall Thickness Tolerances

Standard Wall Thickness(mm) Tolerance
GB3087 3-20 +15%,12.5%
>20 ±12.5%
GB5310 <3.5 +15%,-10%
3.5-20 +15%,-10%
>20 ±10%

Chemical composition and mechanical properties

Standard Grade Chemical composition(%) Mechanical properties
C Si Mn P S Tensile Strength(Mpa) Yield Strength(Mpa) Elongation(%)
DIN17175 St35.8 ≤0.17 0.10-0.35 0.40-0.80 ≤0.030 ≤0.030 360-480 ≥235 ≥25
St45.8 ≤0.21 0.10-0.35 0.40-1.20 ≤0.030 ≤0.030 410-530 ≥255 ≥21