ASTM 420 Stainless Steel Bar 20Cr13 UNS42000 Forged Rod
Grade 420 stainless steel is a high-carbon steel with a minimum chromium content of 12%. Like any other stainless steel, grade 420 can also be hardened through heat treatment. It offers good ductility in its annealed state and excellent corrosion resistance properties when the metal is polished, surface grounded or hardened. This grade has the highest hardness - 50HRC - among all the stainless steel grades with 12% chromium.
Stainless steel grades that are similar to grade 420 stainless steels include martensitic steels such as the other versions of grade 420, having vanadium, sulphur and molybdenum in their composition, and the grade 440 series. Non-standard grade 420C has carbon content that is little higher than that of grade 420.
Martensitic stainless steels are ones with high hardness and high carbon content. These steels are generally fabricated using methods that require hardening and tempering treatments. The operating conditions of martensitic steels are affected by loss of material’s strength at high temperatures, and decrease in ductility at negative temperatures.
Key Properties
The following properties are mentioned for bar products in ASTM A276. The specification may not necessarily be similar for other forms, such as forgings and plate.
Composition
The compositional ranges of grade 420 stainless steels are given in following table:
Table 1 - Compositional ranges of grade 420 stainless steels
|
Grade
|
C |
Mn |
Si |
P |
S |
Cr |
| 420 |
min.
max.
|
0.15
-
|
-
1
|
-
1
|
-
0.040
|
-
0.03
|
12.0
14.0
|
Specifications:
|
Production Name
|
Forged Steel Round Bars
|
| Main Grade |
SCM415 Aisi 4130 4145 alloy AISI 4340 |
| Shape |
Round steel bar |
| Size |
as request |
| Length |
4-5m |
| Tolerance |
±1% |
| Standard |
AiSi
|
| Technique |
Forged |
| Surface |
Black , bright |
| Application |
The key applications of grade 420 stainless steels include:
- Shear blades
- Needle valves
- Surgical equipment
- Cutlery
|
Production Inspection
Our heat treatment center with complete product testing equipment, for instance: the scanning electron micro sconezz(SEM).the transmission electron microscope(TEM)the material testing machine. the large-type metallurgical microscope,the endurance testing machine,the IAS-4 image analyzer, the American ARL direct- reading spectrometer, the American the electric ICP emission spectrometer, the American LECO infrared carbon sulfur analyzer, the hydrogen analyzer, the oxygen and nitrogen analyzer,the Swiss end harden ability tester, the German Zeiss inverted microscope, the Japanese CARTON stereo microscope, the 500J impact testing machine, the 500N hydraulic universal tester, the water immersion flaw detector, the radio element detector and so on.
Evergrowing Resources CO.,Ltd
Evergrowing Resources Co., Limited was Located in Nanjing, China. We have engaged in import and export of all kinds of ferrous and nonferrous materials all over the world. Because we are top agent of several different steel mills in Asia and Europe, so we have ability to offer best quality products and services to our clients. Till now, we have supplied products and services in Asia, Europe, Africa, North America and South America. Following the trend of market development, we have built our special steel processing center in Jiangsu, China to do further processing on the products, such as heat treatment (QT, N, ANN), rough turned, CNC cutting and etc. We have extended our industrial train and enhanced the ability to provide the auxiliary item, and thus strengthened our market advantage.
Product Tags:
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AiSi ASTM Stainless Steel Round Bar High Carbon Forged Round Bar Images
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