Single values are maxima unless indicated otherwise; unlisted elements and blank cells are not assumed zero. Alternative limits, optional additions and analysis tolerances require the relevant table notes and order agreement. This reference table does not replace the complete standard.
3.力学性能
表C.5-不含硼合金钢牌号的力学性能
Steel name
Diameter
Delivery condition
+AC or +AC+PE
+AC+C+AC
+AC+C+AC+LC
above mm
up to mm
Rm max. MPa
Z min %
Rm max. MPa
Z min. %
Rm max. MPa
Z min. %
42CrMo4 42CrMoS4
2
5
620
60
660
58
5
40
630
58
610
60
650
58
4.淬透性要求
表C.7-具有规定 (正常) 淬透性的不含硼的钢种的硬度限值 (H级)
ISO 4954:2022 Table C.7 PDF p.50
Steel name
Sym- bol
Austenitizing temperature °℃±5℃
Limits of range
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Hardness HRC at a distance from quenched end of test piece(in mm) of
Steel name
Sym- bol
Austenitizing temperature °℃±5℃
Limits of range
1.5
3
5
7
9
11
13
15
20
25
30
35
40
45
50
42CrMo4
+H
850
max.
61
61
61
60
60
59
59
58
56
53
51
48
47
46
45
42CrMo4
+H
850
min.
53
53
52
51
49
43
40
37
34
32
31
30
30
29
29
表C.9-淬透性受限的无硼钢种的硬度限值散射带 (HH和HL等级) a
Steel name
Symbol
Austenitizing temperature ℃±5℃
Limits of range
Hardness HRC at a distance from quenched end of test piece(in mm) of
1,5
3
5
7
9
11
13
15
20
25
30
35
40
45
50
42CrMo4 42CrMoS4
+HH
850
max
61
61
61
60
60
59
59
58
56
53
51
48
47
46
45
min.
56
56
55
54
52
48
46
44
41
39
38
36
36
35
34
+HL
max.
58
58
58
57
56
54
53
51
49
46
44
42
41
40
40
min.
53
53
52
51
49
43
40
37
34
32
31
30
30
29
29
min.
53
53
53
53
52
51
51
51
51
50
50
50
50
49
48
min
50
50
50
50
49
48
48
48
48
47
47
47
46
45
44
This table is not applicable to steels ordered with a restricted range of carbon content,see footnote c)in Table C.2.
表C.10-芯部硬度试验中至少应获得90% 马氏体的最大直径 (+ CH等级)
Steel name
Symbol
Austenitizing temperature in the core hardening testa C±5℃
Min.core hardness ( 90 %martensite structure) HRC
Maximum diameter to ensure 90 %of martensite in the coreb mm
42CrMo4
+CH
850
50
21
a As a guideline,a hardening time at temperature of at least 30 min is recommended. The maximum diameters stated are those attainable with the lowest hardenability within each steel grade.Using +HH grades the maximum diameter can be increased.
