Original Title: 15B37H Steel 15B37H Round Steel Bar Steel grade: 15B37H low alloy steel carburizing steel alloy structural steel alloy steel Standard: ASTM AISI SAE UNS. 15 Chemical composition of B37H: Carbon C: 0.35-0.40 Si: 0.17-0.37 Manganese Mn: 0.80 ~ 1.10 S ：≤0.035 Phosphorus P: ≤ 0.035 Chromium Cr: 1.00 ~ 1.30 Nickel: ≤ 0.030 Copper Cu: ≤ 0.030 Ti: 0.04-0.10 Tensile strength...