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.
