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标准 技术协议‎
用途 用于制造轴
‎尺寸 根据技术协议‎
APPLICATIONSTEEL GRADEOD/mmWT/mm
BEARING AXLE PIPE20Mn2/SAE1527127/133/146/152 178/194/2198/9/10/12/14 16/18/22/24
DRMNG AXLE PIPEQ345B180/194/203/21914/16/18

‎注:可以根据客户的要求调整化学成分和规格‎

‎钢级和化学成分‎

牌号 化学成份%
20Mn2 C Si Mn
0.17-0.24 0.17-0.37 1.40-1.80
钢类 P S Cu Cr Ni Mo
不大于 (%)
优质钢 0.035 0.035 0.30 0.30 0.30 0.15
高级优质钢 0.25 0.025 0.25 0.30 0.30 0.10
特级优质钢 0.025 0.015 0.25 0.30 0.30 0.10
STEEL GRADECSiMnPSNiCrNbCuMoVAL
Q345A≤0.20≤0.50≤1.70≤0.030≤0.030≤0.50≤0.30≤0.07≤0.030.100.15-
Q345B≤0.20≤0.50≤1.70≤0.030≤0.030≤0.50≤0.30≤0.07≤0.030.100.15-
Q345C≤0.20≤0.50≤1.70≤0.030≤0.030≤0.50≤0.30≤0.07≤0.030.100.15≤0.015
Q345D≤0.18--≤0.030≤0.025≤0.50≤0.30≤0.07≤0.030.100.15≤0.015
Q345E≤0.18--≤0.025≤0.020≤0.50≤0.30≤0.07≤0.030.100.15≤0.015
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