AISI 420 UNS S42000 Stainless Cold Rolled Steel Strip In Coil
Martensitic stainless steels are essentially alloys of chromium and
sufficient carbon content
that transform into martensite, a distorted body-centered cubic crystal structure,
after hardening.
They are magnetic, and are formulated to respond well to heat
treatment.
Similar to non-stainless hardenable steels, the maximum attainable
hardness, and strength,
is in direct proportion to the amount of carbon present in the alloy.
However, the chromium present in the alloy allows for maximum
hardness to be reached in
all but the thickest sections by austenitizing and quenching in air (air-hardening).
Corrosion resistance in mild atmospheric environments is excellent;
many times better
than mild steel; however common martensitic stainless steels are not as
corrosion-free as highly
alloyed austenitic stainless grades such as 316L in harsh environments.
Martensitic stainless steels are specified when the application
requires good tensile strength,
creep, and fatigue strength properties, in combination with moderate
corrosion resistance and
heat resistance up to approx. 1200 °F.
Typical (historical) uses of this grade include cutlery, turbine
engines, petrochemical equipment,
surgical and dental instruments, scissors, valves, gears, cams and
ball bearings.
Depending on the carbon content, martensitic alloys can be capable
of tensile strengths approaching
300 ksi (2000 Mpa).
The most common, type 410, can be hardened to approximately 200 ksi
(1400 Mpa) in an as quenched-state.
However, a tempering operation is usually performed to increase
ductility and reduce brittleness.
Martensitic stainless steels are readily available in coil, sheet,
strip, plate, wire and bar forms.
AISI 420 - UNS S42000:
AISI Type 420 is a martensitic stainless steel that provides
increased strength and hardness
relative to Type 410, with moderate corrosion resistance. It is magnetic in both the
annealed
and hardened conditions.
Maximum corrosion resistance is attained in the fully hardened or
fully hardened and stress
relieved condition.
High carbon content results in the formation of chromium carbide
compounds, providing excellent
wear resistance and edge retention when hardened.
| Grade | C | Cr |
| AISI 420A ( EN 1.4021, DIN X20Cr13 ) JIS SUS420J1 | 0.16~0.25 | 12.00~14.00 |
| AISI 420B ( EN 1.4028, DIN X30Cr13 ) JIS SUS420J2 | 0.26~0.35 | 12.00~14.00 |
| AISI 420X ( EN 1.4031, DIN X39Cr13 ) | 0.36~0.42 | 12.50~14.50 |
| AISI 420C, 420HC ( EN 1.4034, DIN X46Cr13 ) | 0.43~0.50 | 12.50~14.50 |
| AISI 420D ( EN 1.4037, DIN X65Cr13 ) | 0.58~0.70 | 12.50~14.50 |
For Details, please Contact
WUXI GUANGLU Special Steel Co., Ltd.
Stainless martensitic • precipitation hardening steel • stainless
ferritic — Our answer to your needs
Tel: +86 510 81812873
Email: export@guanglusteel.com
