JBZQ 4288-1986 合金结构钢.pdf

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国家机械工业委员会重型机械局企业标准
JB/ZQ4288-86
代替QZB61-73
合金结构钢
共14页第1页
本标准适用于合金结构钢的锻件
化学成分
1.1合金结构钢的化学成分应符合表1的规定。
表
创号
化学成分%
Si
M
P≤
Mo
NI
其
20S1MT
0.16~0.220.60-0.8011.00~1.300.035「0.035
35 SIMI
0.32~0.401.10~-1.4011.10~1.400.0350.035
50simn
0.46~0.540.80~1.1010.80~1.100.0350.035
S16MnCr「0.140.190.15~0.4011.00~1.300.035「0.035「0.80~1.10
S20mncr
0.17~0.22「0.15~0.4011.00~1.400.0350.0351.10~1.30
20 Crmnti10.17~0.240.20~0.4010.80~1.10
1.00~1.30
i
0.06~0.12
20MNMO
0.17-~0.230.20-0.4010.90~-1.300.0350.035
0.15-0.25
S25CMo10.220,290.15-0.4010.50-0.8010.035100351090~1,2010.15~030
35crmo
0.32~0.400.20~0.4010.40~0.700.035「0.035「0.80~1.10「0.15~0.25
S42CRMO
0.38-0.450.15~0.4010.50~0.800.035「0.035「0.90~1.2010.15~0.30
S50CrMo「0.46-0.540.15~0.4010.50~0.800.035「0.035「0.90~1.2010.15~0.30
20 CRMNMO「0.17-0.240.20-0.4010.90~1.200.035「0.03511.10~1.4010.20~0.30
18 MNMONB10.16-0.220.20-0.4011.20~1.500.03510.035
0.45~0.60
0.02~0.15
42 Mnmov10.3-0.451.20~1.5010.20~0.400.0350.035
0.20~0.30
0.10-0.20
S15Cr2Ni210.12~0.170.15~0.4010.40~0.600.03510.0351.40~1.3701.40~1.70
20Cr2Ni410.17~0.2310.17-0.3710.30-0600.03010.0301.25~1.75
3.75
1.40~
S17Cr2Ni2Mo「0.14-0.190.15~0.4010.40-0.600.03510.03511.50~1.8010.25~0.35
1.60
1.80
S30Cr2Ni2Mo10.26~0.340.15~04010.30~0.600.0350.03511.80~-2.2010.30~0.50
2.20
4CN3Mo10.0400.17-03710.50-0800.035103510.701001025-04/N-0
S34Cr2Ni2Mo「0.30-0.38」0.15~0.4010.40-0.700.035「0.035「1.40)~1.7010.15~0.30
25
40 CRNIMO10.37~044017-0.3710.50-0800.03010.03010.60-09010.15~025
1.75
4.00
18C2Ni4W10.13-0.190.17-0.3710.30-0.600.03010.03011.35-1,65
4.500.80-1.20
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卖表
钢号
化学成分%
C
Si
MnP≤s≤ Cr Mo Ni其它
38 RMOAL0.35~0.420.20~0.400.30~0.600.035「0.0301.35~1.650.15~0.25
0.70)~1.10
20C
0.17~0.240.2(0~0.40「0.50~-0.8010.0350.0350.70-~1.10
0.37~0.450.50-0.80「0.20-0.400.0350.0350.80~1.10
50cr
0.47~0.540.20-0.40「0.50~0.80「0.03510.0350.80~1.10
半凡号前冠以“S”符号,表示采用联邦德国西马克公司(SMS)的钢号
1.2钢中的残余元素含量规定如下
Cr0.35%Ni≤0.35%Cu≤0.20%
1.3锻件成品分析结果的允许偏差应符合表2的规定
表2
元素规定的最大范围
横截面积cm
≤650>650~1300>13002600>26005200>5200~10400>10400
超过規定値上、下限的允忤偏差值%
≤0.25
0.02
0.03
0.03
0.04
0.05
0.05
0.26~0.55
0.03
0.04
0.04
0.05
0.06
≥0.56
0.04
0.05
0.05
0.06
0.07
0.0
≤0.90
0.03
0.04
0.05
0.06
0.07
0.08
≥0.91
0.06
0.06
0.07
0.08
0.08
0.09
0.050
0.008
0.008
0.010
0.010
0.015
0.015
≤0.030
0.005
0.005
0.005
0.006
0.006
0.006
>0.030
0.008
0.010
0.010
0.015
0.015
0.035
0.0)
0.03
0.04
0.04
0.05
0.06
Si
0.05
0.06
0.06
0.07
0.07
0.09
≤1.00
0.03
0.03
0.03
0.03
0.03
0.03
1.0l~~2.00
0.05
0.05
0.05
2.01~-5.30
0.07
0.07
0.07
0.07
0.07
0.07
0.90
0.03
0.04
0.04
0.05
0.05
0.05
0.06
0.06
0.07