Stainless Steel Plates----Stainless Steel Grade 420J2 (UNS S42000)
Introduction
Stainless steel grade 420J2 is cheap and extremely corrosion resistant steel. it's sensible corrosion resistance in gentle atmosphere also as domestic and industrial environments. it's additionally immune to dilute acid, acid, ammonia, crude oil, detergent solutions, vinegar, food acids, many rock oil merchandise, and steam.
Stainless steel grade 420J2 is understood to possess sensible strength and cheap impact resistant properties in hardened and tempered conditions compared with 440 grades.
The following sections can discuss intimately concerning chrome steel grade 420J2.
Chemical Composition
The chemical composition of chrome steel grade 420J2 is made public within the following table.
|
Element |
Content (%) |
|
Chromium, Cr |
14 |
|
Nickel, Ni (optional) |
1 |
|
Manganese, Mn |
1 |
|
Silicon, Si |
1 |
|
Phosphorus, P |
0.04 |
|
Carbon, C |
0.15-0.36 |
|
Sulfur, S |
0.03 |
|
Iron, Fe |
Balance |
Fabrication and warmth Treatment: Machinability Stainless steel grade 420J2 is machinable each in hardened and tempered conditions like turning, drilling, and bending; but it\'s counseled that machining in hardened condition ought to be avoided as way as attainable. Welding Welding of chrome steel grade 420J2 is simple. it's counseled that fastening in treated or hardened and tempered conditions ought to be avoided because it causes formation of crispiness, leading to cold cracking attributable to contraction stresses. Pre-heating and inter-pass temperature management throughout fastening, followed by terribly slow cooling and post-weld tempering square measure sensible measures to require to stop cracking. Annealing Annealing of this material is performed by heating uniformly to 840 to 900°C and control till the temperature is uniform throughout the section. Soaking and cooling is needed. Heat Treatment Stainless steel grade 420J2 needs to be heated uniformly to 730 to 790°C and control till temperature is uniform throughout the section. Hardening Stainless steel grade 420J2 is hardened by heating 950 to 1020°C and control till temperature is uniform throughout the section. this could be followed by extinguishing in oil or air cooling. Tempering ought to be done once it\'s slightly heat. Applications Stainless steel grade 420J2 is employed within the following application areas: Surgical instruments, Hair-cutting scissors and domestic scissors, Budget knives and diving knives, Dagger and swords,
Other Designations
Other designations that are equivalent to stainless steel grade 420J2 include the following.
BS970 Part3 1991 420S37
BS970 Part4 1970/73 420S45
BS970 1955 EN56C
ASTM A276-98b 420
EN56D
AISI 420
JIS G4303
SUS 420 J1
SAE 51420
SUS 420 J2
Key Words: Stainless Steel Plates, Stainless Sheet 304, aceroinoxidable