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1.7321, DIN 20MoCr4, AISI 8620

We can produce 1.7321, DIN 20MoCr4, AISI 8620 stainless steel round rods, 1.7321, DIN 20MoCr4, AISI 8620 forging,sheet,coil,and profiledstrip,Deformed steel,flat steel,mould,steel wire,have all specifications. With DuoNian production experience, strict control 1.7321, DIN 20MoCr4, AISI 8620 chemical composition and 1.7321, DIN 20MoCr4, AISI 8620 mechanical properties.From casting, forging, steel to hot and cold rolling process, heat treatment, etc, we have the control of professional engineers. We have advanced precision machining equipment, according to the requirements of users machining. in order to achieve the most satisfied with the user requirements.

Production specification

Round bar steel: 1mm to 3500mm
Square-shape steel: 1mm to 4000mm
Plate steel:0.1mm to 4000mm
Width: 10mm to 2500mm
Lenth: We can supply any lenth based on the customer's requirement.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Tubings: OD: φ6-1800mm, with wall thickness ranging from 1-35 mm.
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price.
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1.7321, DIN 20Mo Cr4, AISI 8620

Designation by Standards

Brand Name	LH No.	Mat. No.	DIN	EN	AISI
20MOCR4	763	1.7321	20Mo Cr4	20Mo Cr4KD	8620

Chemical Composition (in weight %)

C	Si	Mn	Cr	Mo	Ni	V	W	Others
0.20	max. 0.40	0.85	0.45	0.45	-	-	-	-

Description
One of the most popular and widely used carborizing steels available. 20Mo Cr4 is a hardenable chromium, molybdenum, nickel low steel/" target="_blank" class="keylink">alloy steel often used for carburizing to develop a case-hardened part. This case-hardening will result in good wear characteristics.

Applications
Gears, shafts and other applications where a hard carborized case and a tough core are desired.

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [10³ x N/mm²]: 210
Density [g/cm³]: 7.85

Coefficient of Linear Thermal Expansion 10^-6 ^oC^-1

20-100^oC	20-200^oC	20-300^oC	20-400^oC	20-500^oC
11.1	12.1	12.7	12.9	13.5

Soft Annealing
Heat to 650-700^oC, cool slowly. This will produce a maximum Brinell hardness of 207.

Heat Treatment

Treatment	Temperature	Cooling
Case hardening	880-980^oC	Oil (water), hot bath 160-250^oC
Carburising	880-980^oC	Oil (water), hot bath 160-250^oC
Direct hardening	860-900^oC	Oil, hot bath 160-250^oC
Core refining	860-900^oC	Oil, hot bath 160-250^oC
Core refining	780-820^oC	Oil, hot bath 160-250^oC
Tempering	150-200^oC	Air

Hardenability Diagram

Forging
Hot forming temperature: 1050-850^oC.

Machinability
Machining is done prior to carburizing to within as close a tolerance as possible. Finish machining, after heat treatment and/or carburizing, should be at a minimum so as not to impair the hardened case of the part. Machining may be done by conventional means prior to heat treatment - after carburizing machining is usually limited to grinding.

Welding
The alloy may be welded by conventional methods, usually gas or arc welding. Preheating at 200^oC is beneficial and subsequent heating after welding is recommended - consult the approved weld procedure for the method used.

Cold working
The alloy may be cold worked in the annealed condition by conventional methods. Cold working, as with machining, should be done to as close a tolerance as possible before heat treatment or carburizing.

Mechanical properties

1.7321, DIN 20MoCr4, AISI 8620 Mechanical properties,Our production completely according to the 1.7321, DIN 20MoCr4, AISI 8620 standards to meet the 1.7321, DIN 20MoCr4, AISI 8620 mechanical performance, can also according to the customer request, to meet the requirements of customers of 1.7321, DIN 20MoCr4, AISI 8620 mechanical properties.

Heat treatment

1.7321, DIN 20MoCr4, AISI 8620 Heat treatment,Our production completely according to the 1.7321, DIN 20MoCr4, AISI 8620 standards to meet the 1.7321, DIN 20MoCr4, AISI 8620 Heat treatment, can also according to the customer request, to meet the requirements of customers of 1.7321, DIN 20MoCr4, AISI 8620 Heat treatment.

Machining

1.7321, DIN 20MoCr4, AISI 8620 Machining,Our production completely according to the 1.7321, DIN 20MoCr4, AISI 8620 standards to meet the 1.7321, DIN 20MoCr4, AISI 8620 Machining, can also according to the customer request, to meet the requirements of customers of 1.7321, DIN 20MoCr4, AISI 8620 Machining.

Welding performance

1.7321, DIN 20MoCr4, AISI 8620 Welding performance,Our production completely according to the 1.7321, DIN 20MoCr4, AISI 8620 standards to meet the 1.7321, DIN 20MoCr4, AISI 8620 Welding performance, can also according to the customer request, to meet the requirements of customers of 1.7321, DIN 20MoCr4, AISI 8620 Welding performance.

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