Seamless Steel Pipe(tube) STPG370

热轧无缝钢管 HOT ROLLED SEAMLESS TUBE   标准 Standard: JIS3445/JIS3444 用途 Application：用于制作管道，容器，设备，管件及钢结构 For manufacturing of pipelines, vessels, mahine parts, pipe fittings, and steel structures.   尺寸公差 Dimension Tolerance 标准 Standard 外径公差 Outside Diameter Tolerance 壁厚公差 Wall Thickness Tolerance JIS3445/JIS3444 D<50 +/-0.5mm S<4mm +/-12.5% D≥50 +/-1% 4mm≤S≤20mm +15%/-12.5%     S.20mm +/-12.5%   机械性能 Mechanical Properties   标准 Standard 钢级 Grade 抗拉强度 （Mpa) Tensile Strength 屈服强度（Mpa) Yield Strength 伸长率（%） Elongation ≤16mm 16-30mm JIS3445/JIS3444 10 ≥335 205 195 24 20 ≥390 245 235 20 35 ≥510 305 295 17 45 ≥590 335 325 14 Q355B ≥490 325 315 21   化学成分 Chemical Composition(%)   标准 Standard 钢级 Grade C Si Mn P ≤ S ≤ Cr ≤ Ni ≤ Cu ≤ V ≤ JIS3445/JIS3444 10 0.07-0.13 0.17-0.37 0.35-0.65 0.035 0.035 0.15 0.30 0.25 - 20 0.17-0.23 0.17-0.37 0.35-0.65 0.035 0.035 0.25 0.30 0.25 - 35 0.32-0.39 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.30 0.25 - 45 0.42-0.50 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.30 0.25 - Q355B ≤ 0.230 ≤ 0.55 1.00-1.60 0.035 0.035 0.30 0.30 0.30 - OTHER STANARD: ASTM A53, ASTM A106, ASTM 500-98, ASTM501-98, ASTM A519-98, JIS G3441-1994, DIN1629, JIS G3444-1994, ISO 2937.