Alloy 420 UNS S42000 Stainless Steel Plate SS420 20Cr13 Inox SUS420
Alloy 420 is a hardenable, martensitic stainless steel that is a modification of Alloy 410. Similar to 410, it contains a minimum of 12% chromium, just sufficient enough to give corrosion resistant properties. Alloy 420 has higher carbon content than Alloy 410 which is designed to optimize strength and hardness characteristics. It has good ductility it the annealed condition but is capable of being hardened to a minimum Rockwell hardness of 50 HRC, the highest hardness of the 12% chromium grades. Due to its hardening properties, Alloy 420 is not often welded, although it is possible. Martensitic stainless steels are designed for high hardness and sometimes other properties are to some degree compromised. Corrosion resistance is lower than the common austenitic grades and their useful operating range is limited by their loss of ductility at sub-zero temperatures and loss of strength by over-tempering at elevated temperatures. Its best corrosion resistance is achieved when the metal is hardened and surface ground or polished.
Specifications: UNS S42000
APPLICATIONS:
Alloy 420 is used for a variety of applications where good corrosion and outstanding hardness is necessary. It is not usually used at temperatures exceeding 800oF (427oC) due to quick hardening and loss of corrosion resistance. Examples of applications that use alloy 420 include:
- Cuttery
- Knife blades
- Surgical instruments
- Needle valves
- Shear blades
- Scissors
- Hand tools
STANDARDS:
- ASTM/ASME: UNS S42000
- EURONORM: FeMi35Cr20Cu4Mo2
- DIN: 2.4660
- GB :20Cr13
Chemical Properties:
| C | Mn | Si | P | S | Cr | |
|---|---|---|---|---|---|---|
| 420 | 0.15 max | 1.00 max | 1.00 max | 0.04 max | 0.03 max | min: 12.0 max: 14.0 |
Mechanical Properties:
| empering Temperature (°C) | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness Brinell (HB) |
|---|---|---|---|---|
| Annealed * | 655 | 345 | 25 | 241 max |
| 399°F (204°C) | 1600 | 1360 | 12 | 444 |
| 600°F (316°C) | 1580 | 1365 | 14 | 444 |
| 800°F (427°C) | 1620 | 1420 | 10 | 461 |
| 1000°F (538°C) | 1305 | 1095 | 15 | 375 |
| 1099°F (593°C) | 1035 | 810 | 18 | 302 |
| 1202°F (650°C) | 895 | 680 | 20 | 262 |
| * Annealed tensile properties are typical for Condition A of ASTM A276; annealed hardness is the specified maximum. | ||||
Product | Hot Rolled Alloy 420 (UNS S42000) Stainless Steel Plate SS420 20Cr13 Inox SUS420 Plate |
Grade | 201 304 304L 316 316L 321 310S 309S 202 430 409L 444 410s 904L 2205 2507 .etc |
Standard | ASTM,AISI, ASME ,SUS,JIS,EN,DIN,BS,GB .etc |
Certification | ISO,SGS, BV |
Brand | JISCO, LISCO, TISCO ,BAO STEEL POSCO/ ZPSS .etc |
| thickness:0.3mm-20mm |
width:1000mm 1219mm 1250mm 1500mm 1800mm 2000mm or as your requirement | |
Length: 2000mm 2438mm 2500mm 3000mm 3048mm 5800mm 6000mm or as your requirement | |
Surface | NO.1,NO.2D,2B, BA, 6K,SB,8K (Mirror), HL, No.4, Sand Blasting ,Embossed, Etching. etc. More than 80 different pattern for your choice. |
Color | Golden, rose gold, Titanium golden coating, Champagne gold, Brown, Bronze, Black, Sapphire blue, Purple, Gray, Silver, |
Technique | Cold rolled /Hot rolled |
Trade Term | FOB, CFR, CIF, CNF, EXWORK |
Payment terms | L/C TT |
Package | Standard export packing or as per customer’s request. |
Port of Loading | Shanghai Port |
Other Products
stainless steel sheet /plate
Stainless steel coil
Stainless steel pipe/tube
Stainless steel bar/rod
Stainless steel square/angle bar
Galvanized steel sheet/plate
Galvanized steel coil
Galvanized steel pipe/tube
Material/Grade : 304 321 316 316L 310S 309S 202 201 430 409L 444 410s 904L 2205 2507 Incoloy 800 800H 800HT 825 Inconel 600 625 718 Monel 400 Hastelloy C-276.etc
![]()
![]()
![]()
![]()
Company Information
The Reason Why You Will Choose Us
We are an large storage company and have our own factory . We specialize in stainless steel products for 23 years, which located in Wuxi City ,China , very close to Shanghai Port.
After many years of accumulation and upgrading ,we have rich experience in stainless steel products and galvanized steel products .
Our product line includes stainless steel sheet/plate/circle/coil/strip/pipe/tube/bar. etc and galvanized steel sheet/plate/coil/strip. etc . More than 200 kinds of products for your choice .
Our technical staff have developed special stainless steel that used in some extremely harsh working environment. Such as Monel / Incoloy / Inconel / Hastelloy .etc
Our products are certified by ISO9001:2008 authentication quality systems.
we are nominated as the AAA enterprise by Jiangsu government.
Customized Service is provided on the basis of high quality & reasonable price .
We are powerful manufacturer audited by world top inspection company ISO ,SGS, TUV and BV.
Our products have been exported to more than 60 countries and regions.
Good after-sale service .
We sincerely welcome you to visit our factory if you have interest ,we will show our best sincerity .
Our Main Market
![]()
Our Service
Customized Size & Surface Treatment as your requirement .
Free Sample can be provided .
Mill Test Certificate is supplied with shipment, third Party Inspection is acceptable.
Contact : 24-hour online service
Name : Gao Ben
Email : gaoben2012@hotmail.com
QQ : 1461733389
WhatsApp: 86-18068357371
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.