Overview
420 stainless steel is a martensitic stainless steel that is
recognized for its unique combination of strength, corrosion
resistance, and impressive wear resistance. This stainless steel
composition is designed to deliver its key properties at an
affordable price: a relatively high carbon level (0.15 to 0.4%)
provides hardness and strength, while the 12% chromium provides
sufficient corrosion resistance for environments. Manganese
enhances strength and hardenability, while silicon aids in
deoxidization and enhances strength. Phosphorus and sulfur may be
present but are trace impurities. 420 stainless steel finds
application in areas that require high strength, moderate corrosion
resistance, and good hardness. It is commonly used in the
manufacture of knives, surgical instruments, scissors, blades, and
various cutting tools. While it offers good corrosion resistance in
mild environments, it may not be suitable for highly corrosive or
extreme conditions.
What Are the Advantages of Using 420 Stainless Steel?
It has high strength and hardness, making it suitable for
applications that require robust and durable materials. It is known
for its excellent wear resistance. It can withstand abrasion,
friction, and contact with hard materials without significant loss
of surface integrity. It can be hardened through heat treatment.
This allows for the adjustment of its hardness, strength, and
toughness according to specific application requirements. Compared
to some other stainless steel grades, 420 stainless steel is
relatively more cost-effective. It provides a balance between
desirable mechanical properties and affordability. It is an
attractive option for applications that require strength and wear
resistance without the higher costs associated with certain
specialty stainless steel.Such as:
1.Shear Blades
2.Cutlery
3.Surgical Equipment
4.Bearings
5.Needle Valves
6.Bushings
7.Knife Blades
8.Screens
9.Fasteners
10.Pump Shafts
11.Ladder Rungs
12.Valve Components
13.Steam/Gas Applications
14.Turbines
15.Hand tools
What Are the Disadvantages of Using 420 Stainless Steel?
It may be susceptible to corrosion in highly corrosive
environments, such as those containing acids or chlorides. It can
be susceptible to staining and surface discoloration when exposed
to certain chemicals or environments. It requires careful control
of the welding parameters and the use of suitable filler materials
to minimize the risk of cracking and maintain the desired
properties. It has limited heat resistance compared to some other
stainless steel grades. It may experience dimensional changes, loss
of strength, or even deformation when exposed to high temperatures.
It is not recommended for applications involving prolonged exposure
to elevated temperatures( temperatures above 500-550°C).
420 Stainless Pipe Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni |
| SS 420 | 0.15 max | 1.00 max | 1.000 max | 0.040 max | 0.030 max | 12.00 –14.00 | 0.50 max | 0.75 max |
Physical Properties
Melting Point: 2649 - 2750°F (1454 – 1510°C)
Density: 0.2790 lbs/in3 / 7.73 g/cm3
Modulus of Elasticity in Tension: 29 X 106 psi / 200 GPa
Mechanical Properties Stainless Steel 420
| Tensile Strength | Yield Strength (0.2%Offset) | Reduction in Area | Elongation | Hardness |
| Psi – 85,000 | Psi – 45,000 | 50% | 55% | Rb 180 |
Package Process
1.with plastic cap to protect both ends
2.weaving bag wrapped outside the pipe
3.then pack into wooden case.
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Company introduction
