ִ�б���GB/T 20409-2006
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��Ҫ�ּ��ƺţ�20G��20MnG��25MnG��12CrMoG��15CrMoG
���꣺SA-106B��SA-210C
“A”�ͳ��������ƹܵijߴ������Ʋ���
|
�����⾶/mm
|
���Ƹ����ھ�/mm
|
��С�ھ�/mm
|
���Ʊں�/mm
|
��С�ں�/mm
|
����ͷ��
|
���ƶ���
(����)
/mm
|
���Ƹ߶�/mm
|
���Ʋ�߽�(��)
|
���Ƹ���Բ�ǰ뾶/mm
|
���ƽھ�/mm
|
���Ƶ���/mm
|
��������(��)
|
���ƶ��������/mm
|
���ƶ���������
�ۿ�/mm
|
|
A
|
C
|
E
|
S
|
F
|
G
|
I
|
J
|
K
|
O
|
M
|
N
|
Q
|
T
|
U
|
|
28.6
|
15.84
|
13.39
|
6.38
|
5.8
|
4
|
4.78
|
0.85
|
55��
|
0.13~1.27
|
21.55
|
86.19
|
30��
|
8.28
|
13.27
|
|
44.5
|
33.18
|
30.34
|
5.66
|
5.1
|
6
|
1.01
|
30.08
|
180.49
|
21.80
|
|
45
|
33
|
30.20
|
6
|
5.4
|
6
|
1.01
|
30
|
180
|
21.70
|
|
50.8
|
37.92
|
34.93
|
6.44
|
5.8
|
8
|
1.06
|
25.79
|
206.29
|
17.51
|
|
51
|
38.35
|
35.35
|
6.33
|
5.7
|
8
|
1.10
|
26.10
|
208.80
|
17.80
|
|
60
|
46
|
42.92
|
7
|
6.3
|
8
|
1.10
|
31.30
|
250.40
|
23
|
|
60
|
44
|
41
|
8
|
7.2
|
8
|
1.10
|
30
|
240
|
21.70
|
|
60.3
|
43.4
|
40.32
|
8.33
|
7.5
|
8
|
1.12
|
29.52
|
236.16
|
21.24
|
|
60.3
|
42.3
|
39.10
|
9
|
8.1
|
8
|
1.12
|
28.76
|
230.10
|
20.49
|
|
60.3
|
31.44
|
28.55
|
14.43
|
13
|
8
|
1.02
|
21.38
|
171.07
|
13.11
|
|
63.5
|
48.8
|
45.64
|
7.33
|
6.6
|
8
|
1.16
|
33.19
|
265.54
|
24.91
|
|
63.5
|
48.5
|
45.30
|
7.50
|
6.7
|
8
|
1.16
|
33
|
264
|
24.70
|
|
63.5
|
47.72
|
44.53
|
7.89
|
7.1
|
8
|
1.17
|
32.49
|
259.89
|
24.21
|
|
63.5
|
47.52
|
44.29
|
7.99
|
7.2
|
8
|
1.15
|
32.31
|
258.51
|
24.03
|
|
63.5
|
39.24
|
36.19
|
12.13
|
10.9
|
8
|
1.07
|
26.70
|
213.49
|
18.42
|
|
63.5
|
39.09
|
36.10
|
12.21
|
11
|
8
|
1.04
|
26.59
|
212.70
|
18.31
|
|
63.5
|
35.30
|
32.32
|
14.10
|
12.7
|
8
|
1.04
|
24
|
192
|
15.72
|
|
63.5
|
34.64
|
31.66
|
14.43
|
13
|
8
|
1.04
|
23.56
|
188.49
|
15.28
|
|
69.8
|
37.77
|
34.72
|
16.04
|
14.4
|
8
|
1.07
|
25.68
|
205.46
|
17.40
|
|
70
|
50
|
46.72
|
10
|
9
|
8
|
1.20
|
34
|
272
|
25.72
|
|
70
|
52
|
48.70
|
9
|
8.1
|
8
|
1.20
|
35.37
|
282.95
|
21.09
|
|
76.2
|
39.55
|
36.47
|
18.33
|
16.5
|
8
|
1.07
|
26.99
|
215.19
|
18.62
|
“B”�ͳ��������ƹܵijߴ������Ʋ���
|
�����⾶/mm
|
���Ƹ����ھ�/mm
|
��С�ھ�/mm
|
���Ʊں�/mm
|
��С�ں�/mm
|
����ͷ��
|
���ƶ���
(����)
/mm
|
���Ƹ߶�/mm
|
���Ʋ�߽�(��)
|
���Ƹ���Բ�ǰ뾶/mm
|
���ƽھ�/mm
|
���Ƶ���/mm
|
��������(��)
|
���ƶ��������/mm
|
���ƶ���������
�ۿ�/mm
|
|
B
|
C
|
E
|
S
|
F
|
G
|
I
|
J
|
K
|
O
|
M
|
N
|
Q
|
T
|
U
|
|
35
|
20.60
|
18.10
|
7.20
|
6.5
|
6
|
3.23
|
0.95
|
50��
|
0.4~2
|
18.67
|
112
|
30��
|
5.60
|
13.07
|
|
38
|
23.60
|
20.80
|
7.20
|
6.5
|
6
|
0.99
|
21.39
|
128.20
|
15.79
|
|
38��1
|
23.23
|
20.49
|
7.44
|
6.7
|
6
|
0.99
|
21.06
|
126.40
|
15.46
|
|
60
|
45.60
|
42.20
|
7.20
|
6.5
|
12
|
1.23
|
20.70
|
247.90
|
15.10
|
|
60
|
44.50
|
41.20
|
7.75
|
7
|
12
|
1.22
|
20.18
|
242.10
|
14.56
|
|
60
|
43.40
|
40.10
|
8.30
|
7.5
|
12
|
1.21
|
19.68
|
236.15
|
14.08
|
|
66��7
|
50.70
|
-
|
8
|
7.2
|
12
|
3.83
|
1.24
|
23
|
276
|
6.64
|
16.36
|
|
66��7
|
49.60
|
-
|
8.55
|
7.7
|
12
|
1.24
|
22.50
|
270
|
15.86
|
��ѧ�ɷ�:
|
�ƺ�
|
��ѧ�ɷ�(%)
|
|
C
|
Mn
|
Si
|
Cr
|
Mo
|
S
|
P
|
|
20G
|
0.17~0.23
|
0.35~0.65
|
0.17~0.37
|
-
|
-
|
≤0.020
|
≤0.025
|
|
20MnG
|
0.17~0.23
|
0.70~1.00
|
0.17~0.37
|
-
|
-
|
≤0.020
|
≤0.025
|
|
25MnG
|
0.22~0.29
|
0.70~1.00
|
0.17~0.37
|
-
|
-
|
≤0.020
|
≤0.025
|
|
12CrMoG
|
0.08~0.15
|
0.40~0.70
|
0.17~0.37
|
0.40~0.70
|
0.40~0.55
|
≤0.020
|
≤0.025
|
|
15CrMoG
|
0.12~0.18
|
0.40~0.70
|
0.17~0.37
|
0.80~1.10
|
0.40~0.55
|
≤0.020
|
≤0.025
|
|
ע1�� 20G��20MnG��25MnG�IJ���Ԫ�غ���Ӧ���ϣ�Cu≤0.20%��Cr≤0.25%��Ni≤0.25%��V≤0.08%��Mo≤0.15%�������ƺŵIJ���Ԫ�غ���Ӧ���ϣ�Cu≤0.20%��Ni≤0.30%��
ע2�� 20G����������Ӧ������0.010%��
ע3�� ������ת��¯�⾫������ĸ֣�������Ӧ������0.008%��
|
����������ѧ���ܣ�
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�ƺ�
|
����ǿ��
Rm/
MPa(N/mm2)
|
������ǿ��
R eL/
MPa(N/mm2)
|
�Ϻ��쳤��
A/%
|
�����
Akv/J
|
|
����
|
|
20G
|
410~550
|
245
|
��ѹ��¯����������ֹ�24
|
35
|
|
20MnG
|
≥415
|
240
|
22
|
35
|
|
25MnG
|
≥485
|
275
|
20
|
35
|
|
12CrMoG
|
410~560
|
205
|
21
|
35
|
|
15CrMoG
|
440~640
|
235
|
21
|
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