8620H material knowledge solving, what material is 8620

Reply 6 In addition to the poor hardenability and core hardness of this material, its quenching arcanization temperature range is very wide, I have done a special long-term tracking testing test, and the arcanization temperature can be freely selected in the range of 830 900. Little has changed in the metallographic structure. If your product deformation is not high or the product structure is not sensitive to deformation, and you require a high core hardness, you can choose a higher quenching temperature; On the contrary, if the deformation is sensitive, the deformation amount is small, and the core hardness is not high or not required, a lower quenching temperature can be selected.

AISI 8620H is an American standard alloy structural steel and the executive standard is: ASTM A304-2016

AISI 8620H has high hardenability, no tempering brittleness, good weldability, little tendency to form cold cracks, good machinability and cold strain plasticity. It is generally used in the quenched and tempered or carburizing and quenching state, and is used to manufacture high-pressure pipes and various fasteners working in non-corrosive media and media with a working temperature of less than 250 and containing nitrogen-hydrogen mixtures, and higher-grade carburizing parts, such as gears, shafts, etc.

AISI 8620H Chemical Composition:

Manganese mn:sulfur s:

Phosphorus p:

Chromium Cr: Nickel Ni:

Copper cu:

Molybdenum mo:

The quenching medium we use is N32 mechanical oil (because this product is in the development stage, and the special quenching oil has not been purchased), our current quenching temperature is 880 degrees, but the Paralympic seems to be a little exceeded, please help analyze it. Strong permeability cp:, temperature 920 diffusion hours, cool down to 880 heat preservation for 40 minutes,,, oil tank stirring medium speed.

Reply 3 900 It's too high, Yang Gong, we use 920 carburizing, diffusion 905, 840 quenching, fast oil + strong stirring, the heart can reach 40hrc

8620 steel is equivalent to domestic 20crnimo steel. It is a commonly used alloy carburizing steel, the surface after carburizing treatment has a fairly high hardness, wear resistance and contact fatigue strength, while the core also retains good toughness, can withstand high state impact loads. It is mainly used as a material for impact-resistant and wear-resistant parts such as automobile bearings.

8620H is commonly used in the manufacture of small and medium-sized cars.

gears in the engine and transmission system of a tractor; It can also replace 12CrNi3 steel to manufacture carburized parts and cyanide parts that require high core performance, such as the claws and cone bodies of cone bits used in oil drilling and metallurgical open-pit mines. Because 8620 contains molybdenum, in addition to having a good comprehensive performance, it can also withstand a certain temperature, so it can be used to manufacture gear whole rotor internal combustion engine connecting rod valve section forgings of steam draft inspection turbines.

8620H is an American standard alloy structural steel.

SAE8620H (AISI8620H) alloy steel.

American Standard SAE AISI

Grade: 8620h

Standard: ASTM A29 A 29M-05

Features & Applications:

8620H special steel.

U.S. Special Steels.

Chemical Composition: Carbon C:;

Manganese mn:phosphorus p:

Sulfur s: Silicon nickel ni:

Chromium Cr:Molybdenum Mo:

8620H is a guaranteed hardenability steel in accordance with ASTM A304.

Chemical Composition: Manganese Mn:

Sulfur s:

Phosphorus p:

Chromium Cr: Nickel Ni:

Copper cu:

Molybdenum MO: Mechanical Properties: Tensile Strength B (MPa): 980(100)Yield Strength S (MPa): 785(80)Elongation δ5 (%9

Section shrinkage (40

Impact power AKV (J): 47

Impact toughness value kv (j cm2): 59(6)hardness: 197hb

Specimen size: The specimen blank size is 15mm

ASTM8620 is an alloy. The executive standard is ASTM A29 A29M-04. It is equivalent to 20CrNIMO in China, and is a CR-N i-Mo series case-hardening steel widely used for carburizing and carbonitriding.

Use. 8620H is commonly used in the manufacture of gears in the engine and transmission system of small and medium-sized automobiles and tractors; It can also replace 12CrNi3 steel to manufacture carburized parts and cyanide parts that require high core performance, such as the claws and cone bodies of cone bits used in oil drilling and metallurgical open-pit mines. Because 8620 contains molybdenum, in addition to good comprehensive properties, it can also withstand a certain temperature, so it can be used to manufacture gear whole rotor internal combustion engine connecting rod valve section forgings for steam turbines.

8620 steel is equivalent to domestic 20crnimo steel.

Introduction: It is a commonly used alloy carburizing steel, the surface has quite high hardness, wear resistance and contact fatigue strength after carburizing treatment, and the heart hidden code carrying part also retains good mold hill toughness, which can withstand high impact loads. It is mainly used as a material for impact-resistant and wear-resistant parts such as automobile bearings.

Heat treatment specifications and metallographic structure:

Heat treatment specification: quenching, the first stove volt once 880 plus or minus 20 degrees, the second 790 plus or minus 20 degrees, oil cooling; tempering, 150 to 200 degrees air cooling;

Metallographic structure: martensite.

Alloy structural steel: 8620h

Chemical composition (national standard).

Carbon C: Silicon Si:

Manganese Mn:Sulfur S: Allowable residual content

Phosphorus p: permissible residual content

Chromium Cr: Nickel Ni:

Copper Cu: Permissible residual content

Molybdenum MO: mechanical properties.

Tensile Strength B (MPa): 980(100)Yield Strength S (MPa): 785(80)Elongation δ5 (%9

Section shrinkage (40

Impact power AKV (J): 47

Impact toughness value kv (j cm2): 59(6)hardness: 197hb

Quenched 850, oil cooled; Tempered 200, air-cooled.

The 8620H material is a commonly used alloy carburizing steel, which is a CR-N i-Mo series case-hardened steel widely used for carburizing and carbonitriding.

Features and scope of application.

The carburized surface has a fairly high hardness, wear resistance and contact fatigue strength, while the core retains good toughness and can withstand high impact loads. ASTM8620 is mainly used as a material for impact-resistant and wear-resistant parts such as automotive bearings. Steel grade 8620 in the SAE standard.

The hardenability is similar to that of 20crni steel. Although the Ni content in the steel is half of that of 20CrNi steel, the upper part of the austenite isothermal transition curve is shifted to the right due to the addition of a small amount of Mo. Due to the appropriate increase of MN content, the hardenability of this steel is still very good, and the strength is higher than that of 20CrNi steel. It is commonly used in the manufacture of gears in the engine and transmission system of small and medium-sized cars and tractors; It can also replace 12CrNi3 steel to manufacture carburized parts and cyanide parts that require high core performance, such as the claws and cone bodies of cone bits used in oil drilling and metallurgical open-pit mines.

Because it contains molybdenum, in addition to having good comprehensive properties, it can also withstand a certain temperature. It is used in the manufacture of steam turbine gears, rotors, internal combustion engines, connecting rods, and valve cross-section forgings. Chemical Composition:

Silicon Si: Sulfur S: Allowable residual content

Chromium Cr:Molybdenum Mo:

Mechanical properties: tensile strength b (mpa): 1176(120).

Elongation δ5 (%9

Heat treatment specifications and metallographic structure:

Heat treatment specification: quenching, ** 880 20, * 790 20, oil cooling; Tempered, 150 200, air-cooled.

Metallographic structure: martensite.

Delivery Condition: Hot-rolled or forged steel is delivered in hot-rolled (forged) or annealed condition. Cold-drawn steel is delivered in annealed condition.

SAE8620H alloy structural steel, equivalent to 20Crnimo in our country, Details:

Alloy structural steel: 8620h

Executive Standard: ASTM A29 A29M-04 Chemical Composition:

Carbon C: Silicon Si:

Manganese Mn:Sulfur S: Allowable residual content

Phosphorus p: permissible residual content

Chromium Cr: Nickel Ni:

Copper Cu: Permissible residual content

Molybdenum MO: mechanical properties.

Tensile Strength B (MPa): 980(100)Yield Strength S (MPa): 785(80)Elongation δ5 (%9

Section shrinkage (40

Impact power AKV (J): 47

Impact toughness value kv (j cm2): 59(6)hardness: 197hb

Specimen size: The specimen blank size is 15mm

Heat treatment specifications and metallographic structure:

Heat treatment specification: quenched 850, oil cooled; Tempered 200, air-cooled.

Delivery Status: Delivered in heat-treated (normalized, annealed or high-temperature tempered) or without heat-treated, the delivery status should be indicated in the contract.

AISI 8620 is one of the American standard alloy steel grades, which is the American grade, and the comparison table is as follows:

Turn left|Turn right.

The chemical composition of AISI SAE8620 is shown in the following figure:

Turn left|Turn right.

It depends on what kind of restraint layer (foil?) you use. Water? Blacking? ), the thickness of the constraint layer, and the power density of the pulsed laser, etc. Unlike mechanical shot peening, the laser impact surface of steel workpieces is relatively flat, and the strengthening effect is average.

20CRNIMO, also known as American Standard 8620, is a commonly used low-carbon alloy structural steel, which is generally used in the state of quenching and tempering or carburizing and quenching, and is widely used in the automotive and aviation industries.

The surface of 20Crnimo steel carburizing heat treatment has quite high hardness, wear resistance and contact fatigue strength, while the core also retains good toughness and can withstand high impact loads. It is mainly used as impact-resistant and wear-resistant workpieces such as automobile bearings, spindles, gears, and mechanical accessories.

SAE8620 is a grade of synthetic gold structural steel specified in the American standard.

C-8620 bearing steel is divided into fully hardened bearing steel, carburized bearing steel, stainless bearing steel and high temperature bearing steel according to chemical composition, performance, processing technology and use. Fully hardened bearing steel is mainly high-carbon chromium steel, such as GCR15, which has a carbon content of about 1% and a chromium content.

In order to improve the hardness, wear resistance and hardenability, some silicon, manganese, molybdenum, etc., such as GCR15SIMN, are appropriately added. This type of bearing steel is the largest producer, accounting for more than 95% of all bearing steel production. Carburizing bearing steel is a carbon content of chromium, nickel, molybdenum alloy structural steel, made of bearing parts after the surface of carbonitriding to improve its hardness and wear resistance, this steel is used to make large bearings that bear strong impact loads, such as large rolling mill bearings, automobile bearings, mining machine bearings and railway vehicle axles.

Stainless bearing steel has high carbon chromium stainless shaft bearing steel, such as 9Cr Cr18MoV, etc., and medium carbon chromium stainless bearing steel, such as 4Cr13, etc., which is used to make stainless and corrosion-resistant bearings. High-temperature shaft bearing steel is used at high temperature (300 500), requiring steel to have a certain degree of red hardness and wear resistance at the use temperature, and most of the high-speed tool steel is used instead, such as W18Cr4V, W9Cr4V, W6Mo5Cr4V2, Cr14Mo4 and Cr4Mo4V, etc.

Product name C-8620

National Standard GB: G20Crnimo ASTM: C-8620 NF:

20ncd2 jis:sncm220 en:(b28)20nicrmo2

Main ingredients S: P: Cu:

Mechanical Properties Tensile Strength b(MPa): 1176 Conditional Yield Strength: 985 Elongation δ5 (%)

9 Application field It is mainly used as a material for impact-resistant and wear-resistant parts such as automobile bearings. It is often used in the manufacture of gears in the engines and transmission systems of small and medium-sized automobiles and tractors, and can also replace 12CrNi3 steel to manufacture carburized parts and cyanide parts that require high core properties, such as claws and cone bodies for oil drilling and metallurgical open-pit mines.

SAE8620 is a U.S. grade, equivalent to the national standard 20CRNIMO.

Chemical Composition: Carbon C:;

Manganese mn:phosphorus p:

Sulfur s: Silicon nickel ni:

Chromium Cr:Vanadium V:

SAE8620 corresponds to the national standard 20CRNIMO This steel grade is suitable for machining gears and has good hardenability.

Tensile Strength B (MPa): 980(100)Yield Strength S (MPa): 785(80)Elongation δ5 (%9

Section shrinkage (40

Impact power AKV (J): 47

Impact toughness value kv (j cm2): 59(6)hardness: 197hb

Specimen size: The specimen blank size is 15mm