Is domestic 420J2 the same steel as 430?

Domestic 420J2 and 430 are not the same 400 series stainless steel (iron) for the following reasons:

First, the steel grade corresponding to 430 and the national standard is 1cr17The tensile strength is greater than 450, the yield strength is greater than 205, and the HBS is less than 183 (the data is annealed). 430 stainless steel is a steel grade with good corrosion resistance, good thermal conductivity compared with austenite, less thermal expansion, and more fatigue resistance.

It is often used in: for architectural decoration, oil burner parts, household appliances, home appliance parts. It is used for hot water tanks, hot water supply systems, sanitary appliances, household durable appliances, bicycle flywheels, etc.

Second, 420J2, also known as 3Cr13 steel, is a martensitic stainless steel. The hardness obtained after heat treatment is only HRC52-55, and the properties such as damage resistance are not very outstanding. Because it is easier to cut and grind, it is suitable for mass production of factory-made knives, and 420 steel is also an ideal steel for the production of diving knives due to its low carbon content and excellent rust resistance.

No. The performance and use of 420J2 are similar to 420J2, but the strength and hardness are higher than 420J2 (3Cr13), but the toughness and corrosion resistance are slightly lower. Poor welding performance is usually not used as a welded part.

1. 420J2 corresponding grades: 1. National standard GB-T standard: digital grade:

S42040, new grade: 40CR13, old grade: 4CR13,2, American standard:

ASTMA standard: one, SAE standard: one, UNS standard:

420J2,3, Japanese standard JIS standard: 420, 4, German standard DIN standard: , 5, European standard EN standard:

x39cr13。

2. 420J2 chemical composition: carbon C:, silicon Si:, manganese Mn: , phosphorus P: , sulfur S: chromium Cr:, nickel Ni: charge plus , molybdenum Mo:, nitrogen N:—, copper Cu:—, other elements:

3. 420J2 physical properties: density density (20).

kg, melting point :—specific heat capacity (0 100 ) kg (, thermal conductivity w (

100 , thermal conductivity w (

500, linear expansion coefficient.

10-6/k)

0 100 , linear expansion coefficient (10-6 k).

12, resistivity (20).

.mm2 m), longitudinal modulus of elasticity.

20) GPA:215, Magnetic:Yes.

4. 420J2 mechanical properties: Delivery status: bar solution treatment, plate solution pickling, tensile strength (rm mpa):

590, Elongation strength (:225, elongation a %: 15, section shrinkage (z %):

5. 420J2 heat treatment: hardness HBW: annealing 201, hardness HRB: quenching and tempering 50HRC, heating temperature: 800 900, heating method: air cooling or slow cooling.

420J2 Applications: Mainly making surgical tools, bearings, valves, springs, etc.

SUS420J1 has certain wear resistance and corrosion resistance, high hardness, and its ** is a lower category of stainless steel balls, which is suitable for the working environment with common requirements for stainless steel.

420J2 stainless steel strip is a grade of stainless steel produced in accordance with the American ASTM standard; Japanese standard SUS420J2, new national standard 30CR13, old national standard 3CR13, numerical code S42030, European standard.

420J1 stainless steel: High hardness and good corrosion resistance after quenching (magnetic)After quenching, 420J2 stainless steel has higher hardness than 420J1 steel (magnetic).

Generally, the quenching temperature of 420J1 is 980 1050, and the hardness of 980 heating oil quenching should be significantly lower than that of 1050 heating oil quenching, and the hardness of 980 oil quenching is HRC45 50, and the hardness of 1050 oil quenching is 2HRC higher. However, the microstructure grains obtained after quenching 1050 are coarse and brittle. It is recommended to use 1000 heating and quenching to obtain better structure and hardness.

The hardness of 420 series steel after heat treatment is roughly HRC52 55, and the performance of damage resistance and other aspects is not very outstanding. Suitable for the production of knives because it is easier to cut and grind, 420 stainless steel is also known as "cutting edge" martensitic steel. 420 series steels are due to the carbon content (carbon content:

Low and excellent rust resistance, so it is an ideal steel for the production of diving knives.

420J2 stainless steel is made of martensitic stainless steel.

The carbon content of 420 series steel is lower, and the hardness obtained after heat treatment is only HRC52-55, and the performance of damage resistance and other aspects is not very outstanding. Because it is easier to cut and grind, it is suitable for mass production of factory-made knives, and 420 steel is also an ideal steel for the production of diving knives due to its low carbon content and excellent rust resistance.

Other Kinds of Stainless Steel:

1. Precipitation hardening stainless steel: refers to a type of high-strength stainless steel, referred to as PH steel, which not only improves the strength of the steel but also maintains sufficient toughness by adding different types and quantities of strengthening elements on the basis of the chemical composition of stainless steel, and precipitating different types and quantities of carbide, nitride, carbonitride and intermetallic compounds through the precipitation hardening process.

2. Ferritic stainless steel: chromium content is 15% to 30%, with body-centered cubic crystal structure. This kind of steel generally does not contain nickel, has the characteristics of large thermal conductivity, small expansion coefficient, good oxidation resistance, excellent resistance to stress corrosion, etc., and is mostly used in the manufacture of parts that are resistant to atmospheric, water vapor, water and oxidizing acid corrosion.

Grinding. 3. Duplex stainless steel: ferrite and austenite each account for about 50% of the limb fiber, and the content of less generally needs to reach at least 30% stainless steel.

4. Austenitic stainless steel: austenitic stainless steel refers to stainless steel with austenitic structure at room temperature. Austenitic stainless steels are non-magnetic and have high toughness and plasticity, but they are low in strength and cannot be strengthened by phase change, but only by cold working.

Summary. Dear, 420 steel should be good. 420 stainless steel is a martensitic stainless steel, which has certain wear resistance and corrosion resistance, high hardness and other characteristics, and is suitable for all kinds of precision machinery, bearings, electrical, equipment, instruments, meters, transportation, household appliances, etc.

It is mostly used in the manufacture of parts that are resistant to atmospheric, water vapor, water and oxidizing acids. <>

<> 420 steel or 2316 steel.

Dear, 420 steel should be good. 420 stainless steel is a martensitic type stainless steel, which has the characteristics of wear resistance and corrosion resistance, high hardness, etc., and is suitable for all kinds of precision machinery, bearings, electrical, equipment, instruments, meters, transportation vehicles, household appliances, etc. It is mostly used in the manufacture of parts that are resistant to atmospheric, water vapor, water and oxidizing acids.

<> pro, 420 stainless steel, 420 stainless steel is 420 "cutting edge" martensitic steel, similar to Brinell high chromium steel, the earliest stainless steel. 420 has a certain wear resistance and corrosion resistance, high hardness, its ** is the lower class of stainless steel balls, suitable for the general requirements of stainless steel in the working environment. 420 stainless steel is suitable for all kinds of local precision machinery, bearings, electrical, equipment, instruments, meters, transportation, household appliances, etc.

It is mostly used in the manufacture of parts that are resistant to atmospheric, water vapor, water and oxidizing Tongsefu acid. <>

420J2 martensitic stainless steel.

Chemical composition. Carbon C:

Silicon SI:

Manganese mn:

Sulfur s:

Phosphorus p:

Chromium Cr: Nickel Ni: Allowed to contain

Mechanical properties. Tensile strength b (mpa): quenched tempered, 735 conditional yield strength mpa): quenched tempered, 540 elongation δ5 (% quenched tempered, 12

Section shrinkage quenched and tempered, 40

Impact power AKV (J): quenching and tempering, 24

Hardness: annealed, 235HB; Quenching and tempering 48 53HRC heat treatment process.

Heat treatment specifications: 1) annealing, 800 900 slow cooling or about 750 fast cooling; 2) Quenching, 920 980 oil cooling; 3) Tempering, 600 750 quick cooling.

Metallographic structure: The tissue is characterized by a martensitic type.

Delivery status: generally delivered in a heat treatment state, and the type of heat treatment is indicated in the contract; If not indicated, it will be delivered in a non-heat-treated state.

According to GB T4240-2009 Table A-1 Japanese SUS420J2 corresponds to Chinese 30CR13 material.

1. 4CR13 corresponding grades: 1. National standard GB-T standard: digital grade:

S42040, new grade: 40CR13, old grade: 4CR13,2, American standard:

ASTMA standard: one, SAE standard: one, UNS standard:

420J2,3, Japanese standard JIS standard: 420, 4, German standard DIN standard: , 5, European standard EN standard:

x39cr13。

2. 4Cr13 chemical composition: carbon c:, silicon si:, manganese mn: , phosphorus p: , sulfur s:, chromium cr:, nickel ni: charge plus , molybdenum mo:, nitrogen n:—, copper cu:—, other elements:—.

420J2 stainless steel belongs to martensitic stainless steel, its processing performance is better than the nuclear bureau, and after heat treatment, that is, tempering, its corrosion resistance including polishing performance has been well improved, and the strong spring noise and wear resistance are also very good, so it is more suitable for manufacturing, can withstand a lot of pressure.

4Cr13 Chemical Composition:

Carbon c silicon si manganese mn sulfur s phosphorus p chromium cr nickel ni

Allowed to contain 420J2 chemical composition:

The carbon content of 4Cr13 is higher, and the hardness after quenching is high.