Alloy Steel
Alloy steel is a special type of steel that is manufactured on the basis of carbon steel by adding one or more alloyed elements. In addition to iron and carbon, the main components of alloy steel include alloying elements such as silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, copper, boron and rare earth elements. These alloalloy elements can improve various properties of steel, such as increased strength, hardness, toughness, wear resistance, corrosion resistance, high temperature resistance and non-magnetic properties. Because of its excellent performance, alloy steel has been widely used in construction, transportation, machinery, electronics and other fields.
Application
Because of its special physical and chemical properties, it is widely used in many fields. The following are the main application areas of alloy steel:
|
Automotive manufacturing
|
Alloy steel plays an important role in the manufacturing of automotive engine components such as pistons, valves, crankshafts, camshafts, gears, rotors, as well as body structural parts. They need to have high hardness, high wear resistance and good fatigue resistance to adapt to the high speed operation of the engine and reduce the weight of the body structure.
|
|
Aircraft manufacturing
|
Alloy steel is also widely used in aerospace manufacturing, including the manufacture of aircraft structural parts, engine parts, and other key components. For example, aircraft hubs and blades need to have good strength, load resistance and fatigue resistance to cope with high strength, high temperature and high speed conditions.
|
|
Shipbuilding
|
Alloy steels are used in the manufacture of propellers, rotors, anchor chains, ship rails and other components of ships, which need to have high strength and wear resistance in order to provide safe operation in harsh sea conditions.
|
|
Machinery manufacturing
|
Alloy steel plays a key role in the manufacturing of machine tools, cranes, cranes, excavators, milling machines and other equipment. They are commonly used in manufacturing various critical components that ensure the stability and reliability of equipment.
|
| Grade | Chemical Composition (mass fraction) % | ||||||||
| C | Si | Mn | P | S | Cr | Mo | Ni | Other a | |
| 15Cr |
0.12~0.17
|
0.17~0.37
|
0.40~0.70
|
≤0.025 | ≤0.015 |
0.70~1.00
|
- | - | residual elements b |
| 20Cr |
0.18~0.24
|
0.17~0.37
|
0.50~0.80
|
≤0.025 | ≤0.015 |
0.70~1.00
|
- | - | |
| 40Cr |
0.37~0.44
|
0.17~0.37
|
0.50~0.80
|
≤0.025 | ≤0.015 |
0.80~1.10
|
- | - | |
| 15CrMo |
0.12~0.18
|
0.17~0.37
|
0.40~0.70
|
≤0.025 | ≤0.015 |
0.80~1.10
|
0.40~0.55
|
- | |
| 20CrMo |
0.17~0.24
|
0.17~0.37
|
0.40~0.70
|
≤0.025 | ≤0.015 |
0.80~1.10
|
0.15~0.25
|
- | |
|
30CrMo
|
0.26~0.33
|
0.10~0.30
|
0.40~0.70
|
≤0.020 | ≤0.010 |
0.80~1.10
|
0.15~0.25
|
- | |
| 35CrMo |
0.32~0.40
|
0.17~0.37
|
0.40~0.70
|
≤0.025 | ≤0.015 |
0.80~1.10
|
0.15~0.25
|
- | |
| 34CrMo4 |
0.30~0.37
|
≤0.40 |
0.60~0.90
|
≤0.025 | ≤0.015 |
0.90~1.20
|
0.15~0.30
|
- | - |
| 42CrMo4 |
0.38~0.45
|
≤0.40 |
0.60~0.90
|
≤0.025 | ≤0.015 |
0.90~1.20
|
0.15~0.30
|
- | |
| SNCM220 |
0.17~0.23
|
0.15~0.35
|
0.60~0.90
|
≤0.025 | ≤0.015 |
0.40~0.60
|
0.15~0.25
|
0.40~0.70
|
When Cu is a residual element: Cu≤0.30 |
| SCM415 |
0.13~0.18
|
0.15~0.35
|
0.60~0.90
|
≤0.025 | ≤0.015 |
0.90~1.20
|
0.15~0.25
|
≤0.25 | |
| SCM435 |
0.33~0.38
|
0.15~0.35
|
0.60~0.90
|
≤0.025 | ≤0.015 |
0.90~1.20
|
0.15~0.30
|
≤0.25 | |
| 20MnB5 |
0.17~0.23
|
≤0.40 |
1.10~1.40
|
≤0.025 | ≤0.015 | - | - | - | B：0.0008～0.0050 |
| 22MnB5 |
0.20~0.25
|
≤0.40 |
1.10~1.40
|
≤0.025 | ≤0.015 | ≤0.30 | - | - | B：0.0008～0.0050 |
| 26MnB5 |
0.23~0.28
|
≤0.40 |
1.10~1.40
|
≤0.025 | ≤0.015 | ≤0.30 | - | ≤0.20 | B：0.0008～0.0050 |
| 38MnB5 |
0.36~0.42
|
≤0.40 |
1.15~1.45
|
≤0.025 | ≤0.015 | - | - | - | B：0.0008～0.0050 |
| 27MnCrB5-2 |
0.24~0.30
|
≤0.40 |
1.10~1.40
|
≤0.025 | ≤0.015 |
0.30~0.60
|
- | - | B：0.0008～0.0050 |
| 40MnB |
0.37~0.44
|
0.17~0.37
|
1.10~1.40
|
≤0.025 | ≤0.015 | - | - | - |
B：0.0008～0.0035
residual element b |
| 16MnCr5 |
0.14~0.19
|
≤0.40 |
1.00~1.30
|
≤0.025 | ≤0.015 |
0.80~1.10
|
- | - | - |
| 20CrMnTi |
0.17~0.23
|
0.17~0.37
|
0.80~1.10
|
≤0.025 | ≤0.015 |
1.10~1.30
|
- | - |
Ti：0.04～0.10
residual element b |
| SAE5120H |
0.17~0.23
|
0.15~0.35
|
0.60~1.00
|
≤0.025 | ≤0.025 |
0.60~1.00
|
- | - | residual element b |
| 40CrMn |
0.37~0.45
|
0.17~0.37
|
0.90~1.20
|
≤0.025 | ≤0.015 |
0.90~1.20
|
- | - | residual element b |
| 50Mn2V |
0.47~0.55
|
0.17~0.37
|
1.40~1.80
|
≤0.025 | ≤0.015 | ≤0.30 | - | - |
V:0.08～0.16
residual element b |
|
Grade
|
Chemical Composition (mass fraction) %
|
||||||||
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
Ni
|
Other a
|
|
|
65Mn-Cr
|
0.62~0.70
|
0.17~0.37
|
0.90~1.20
|
≤0.025
|
≤0.015
|
0.15~0.30
|
- | - | - |
|
75Cr1
|
0.72~0.80
|
0.20~0.45
|
0.60~0.90
|
≤0.020
|
≤0.010
|
0.30~0.60
|
- |
≤0.25
|
Cu≤0.25
|
|
50CrV (50CrVA) |
0.46~0.54
|
0.17~0.37
|
0.50~0.80
|
≤0.025
|
≤0.015
|
0.80~1.10
|
- |
≤0.35
|
V:0.10～0.20
Cu≤0.25 |
|
51CrV4
(50CrV4) |
0.47~0.55
|
≤0.40
|
0.70~1.10
|
≤0.025
|
≤0.015
|
0.90~1.20
|
- | - |
V:0.10～0.25
|
|
80CrV2（8CrV）
|
0.75~0.85
|
0.17~0.37
|
0.30~0.60
|
≤0.025
|
≤0.015
|
0.40~0.70
|
- |
≤0.40
|
V:0.15～0.25
Mo≤0.10 |
|
SUP6
|
0.56~0.64
|
1.50~1.80
|
0.70~1.00
|
≤0.025
|
≤0.015
|
- | - | - |
Cu≤0.30
|
|
SUP10
|
0.47~0.55
|
0.15~0.35
|
0.65~0.95
|
≤0.025
|
≤0.015
|
0.80~1.10
|
- | - |
V:0.15～0.25
Cu≤0.30 |
|
60Si2MnA
|
0.56~0.64
|
1.60~2.00
|
0.70~1.00
|
≤0.025
|
≤0.015
|
≤0.35
|
- |
≤0.35
|
Cu≤0.25
|
|
30CrSiMoVA
|
0.27~0.35
|
0.50~0.80
|
0.50~0.80
|
≤0.025
|
≤0.015
|
1.00~1.30
|
0.40~0.60
|
≤0.30
|
V:0.10～0.25
Cu≤0.25 |
a Alt≤0.060。
b As a residual element: Cu≤0.25、Ni≤0.30、Cr≤0.30、Mo≤0.10。
|
BZJ 309-2014
|
JIS G4053:2018
|
SAE J404-2009
|
EN 10083-3:2006
EN ISO 683-2 :2018 |
EN 10084:2008
EN ISO 683-3 :2022 |
GB/T 24181
-2009-2022 |
GB/T 3077-2015
|
Q/BQB 360-2023
Q/BQB 360-2019 |
| - | - | - | - |
17Cr3
|
- |
15Cr
|
15Cr
|
| - | - | - | - | - | - |
20Cr
|
20Cr
|
| - |
SCr440
|
SAE5140 |
41Cr4
|
- | - |
4
0Cr
|
40Cr
|
| - | - | - | - | - | - |
15CrMo
|
15
CrMo
|
| - |
SCM420
|
- | - |
18CrMo4
|
- |
20CrMo
|
20CrMo
|
|
30CrMo
|
SCM430
|
SAE4130 |
34CrMo4
|
- |
30CrMo
|
3
0CrMo
|
30CrMo
|
| - | - | - | - | - | - |
35
CrMo
|
35CrMo
|
| - |
SCM435
|
SAE4135 |
34CrMo4
|
- | - |
35CrMo
|
34CrMo4
|
| - |
SCM440
|
SAE4140SAE4142
|
42CrMo4
|
- | - |
42CrMo
|
42CrMo4
|
| - |
SCM220
|
SAE8620 | - |
20NiCrMo2-2
|
- |
20CrNiMo
|
SNCM220
|
| - |
SCM415
|
- | - | - | - | - |
SCM415
|
| - |
SCM435
|
SAE4135 |
34CrMo4
|
- | - | - |
SCM435
|
|
BZJ 309-2014
|
SAE J403-2014
|
SAE J1268' -2010 |
EN 10083-3:2006
EN ISO 683-2 :2018 |
EN 10084:2008
EN ISO 683-3 :2022 |
GB/T 24181
-2009-2022 |
GB/T 3077
-2015 |
YB/T
4688-2018 |
Q/BQB 360-2023
Q/BQB 360-2019 |
| - |
SAE15B21
|
- |
20MnB5
|
- | - | - | - |
20MnB5
|
| - |
SAE15B22
|
- | - | - | - | - | - |
22MnB5
|
| - |
SAE15B26
|
- | - | - | - | - | - |
26MnB5
|
| - | - | - |
38MnB5
|
- | - |
40MnB
|
- |
38MnB5
|
| - | - | - |
38MnB5
|
- | - |
40MnB
|
- |
40MnB
|
| - | - | - |
27MnCrB5-2
|
- | - | - | - |
27MnCrB5-2
|
| - | - | - | - |
16MnCr5
|
- |
20CrMn
|
- |
16MnCr5
|
| - | - | - | - | - | - |
20CrMnTi
|
- |
20CrMnTi
|
| - | - |
SAE5120H
|
- | - | - | - | - |
SAE5120H
|
| - | - | - | - | - | - |
40CrMn
|
- |
40CrMn
|
|
50Mn2V
|
- | - | - | - |
50Mn2V
|
- |
50Mn2V
|
50Mn2V
|
|
Q/BQB 360
-2019 |
JIS G4801 -2021 |
SAE J404
-2009 |
EN10132-4:2003
EN10132:2022 |
EN 10089:
2003 |
GB/T 1222
-2016 |
GB/T24181
-2009-2022 |
YB/T
4688-2018 |
Q/BQB 360-2023
|
|
75Cr1
|
- | - | - | - | - | - |
75Cr1
|
75Cr1
|
| - |
SUP10
|
SAE6150
|
51CrV4
|
51CrV4
|
50CrV
|
- | - |
50CrV(50CrVA)
|
|
51CrV4
（50CrV4） |
SUP10
|
SAE6150
|
51CrV4
|
51CrV4
|
50CrV
|
- | - |
51CrV4（50CrV4）
|
|
SUP6
|
SUP6
|
- |
56Si7
|
56Si7
|
60Si2MnA
|
- | - |
SUP6
|
|
SUP10
|
SUP10
|
SAE6150
|
51CrV4
|
51CrV4
|
50CrVA
|
- | - |
SUP10
|
|
60Si2MnA
|
SUP6
|
- |
56Si7
|
56Si7
|
60Si2MnA
|
- | - |
60Si2MnA
|
| - | - | - |
80CrV2（8CrV）
|
- | - | - |
80CrV2
|
80CrV2（8CrV） |