AISI 8620 1.6523 Alloy Steel Round Bar 20nicrmo2-2 Sncm220

• Type: Alloy Steel Bar
• Standard: ASTM
• Technique: Hot Rolled
• Model NO.: 8620 1.6523
• Application: Tool Steel Bar
• Surface Treatment: Polished
• Alloy: Alloy
• Special Use: Mold Steel
• Transport Package: Wooden Box
• Specification: OD 6-630mm
• HS Code: 7219340000
• Production Capacity: 500tons

Product Description

SAE8620H Alloy Round Bar SAE 8620 Alloy Steel Round Bar | UNS G86200 Bar SAE8620H Alloy Solid Round Bar

SAE 8620 is one of alloy construture steel according to Chinese Standard. Standard Code: A50202. The steel round bar is high hardenability, without fragility after tempering,good weldability.Nice machinability and Cold strain plasticity.

HR 8620 steel bar is a low carbon nickel chromium molybdenum alloy with good carburized properties, formability, and weldability. This grade is a low-cost steel that is the most widely used carburizing alloy. Due to its nickel content, this grade has a high strength case and core toughness. The chromium and molybdenum support carburizing, and give good surface hardness and wear. MittelCompany stocks many diameters of 8620 hot rolled steel to meet the markets demand. We also supply 8620 steel bar to various industries like aerospace, agriculture, ATV, construction, and motorcycle.

 

Features

1. 1 Good machinability performance

2. 2. Good Cold strain plasticity

3. 3. Good weldability

4. 4. High hardenability

 

Similar Standards

Designation by Standards

Brand Name	Ravne No.	Mat. No.	DIN	EN	AISI
20NCD2	769	1.6523	21NiCrMo2	20NiCrMo2	8620

Chemical Composition (in weight %)

C	Si	Mn	Cr	Mo	Ni	V	W	Others
0.20	max. 0.40	0.80	0.53	0.20	0.55	-	-	-

Description
20NCD2 is a hardenable chromium, molybdenum, nickel low 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]: 7.86

Soft Annealing
Heat to 650-700^oC, cool slowly. This will produce a maximum Brinell hardness of 212.

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	880-980^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

Distance From Quenched End in mm

mm	1.5	3	5	7	9	11	13	15	20	25	30	35	40
H max.	49	48	45	42	36	33	31	30	27	25	24	24	23
H min.	41	37	31	25	22	20	-	-	-	-	-	-	-
HH max.	49	48	45	42	36	33	31	30	27	25	24	24	22
HH min.	44	41	36	31	27	24	22	21	-	-	-	-	-
HL max.	46	44	40	36	31	29	27	26	23	21	20	20	-
HL min.	41	37	31	25	22	20	-	-	-	-	-	-	-

Forging
Hot forming temperature: 1150-850^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.

Forms manufactured: Please see the Dimensional Sales Program.

Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.

Chemical Composition

Grades	C	Si	Mn	P	S	Cr	Mo	Cu	Ni
20CrNiMo	0.17-0.23	0.17-0.37	0.6-.95	≤0.035	≤0.035	0.4-.7	0.20~0.30	≤0.30	/

 

Mechanical Properties

Queching Temperature(ºC):850;Cold Media:oil

Tempering(ºC):200;Cold Media:air

Tensile strength σb (MPa):≥980(100)

Yield strengthσs (MPa):≥785(80)

Elongationδ5 (%):≥9

Reduction of area ψ (%):≥40

Akv (J):≥47

 

General Applications

Widely used for stransmission system,motor of tractor and middle-small auto. Alternative 12CrNi3 to make higher class carburization and cyanide carburizing parts such as oil drilling,claws and cone for mining.

It is commonly used for carburized gears, pinions, shafts, bearings, piston rings, ring gears, crankshafts, etc.

Stock Size

round bar

Diameter

12-380mm

Sizes and Conditions

Our steel materials are in different sizes and conditions specially catered to our customers' needs. They come in round bars, flat bars, plates and blocks.

The conditions of the materials vary from pre-hardened, hot rolled,annealed, quenched and tempered to surface conditions such as black, pre-machined,griding and polish.

Why choose us?

 

Quality Assurance from government owned steel mills

we meticulously source materials only from steel manufacturers to ensure consistency in providing the finest quality steel products for our customers.

Being in the competitive market today, we clearly understand that customers are looking for products that are not only best in class but also affordably priced. We are confident that we are able to ful fil these two equally vital aspects -our customers' continuous support over the past two decades is the most heartfelt recognition to us.

Speedy and Timely Delivery

Knowing that delivering goods to customers' hands on time is as important as providing quality goods, we treat every business transaction as a priority. Be it a raw material or a finished material with machining or heat treatment, every effort will be made to get your purchase order to you in the shortest lead time.

Quality Commitment

In order to realise competitive products to fulfil our customers' demands and quality considerations, our integrated quality and work management system is continuously being improved and developed further. We document this for our customers by having our quality management system certified in accordance with ISO 9001. This measure is accompanied by audits and recertification's on a regularly prescribed basis.

Our service

We provide quality special steel for all industries.

Orders of any size, any length, ship fast

We carry a unique inventory of specialty special steel

Provide related value-adding services :

metal cutting, sizing, machining (blanking, milling, grinding), and heat treatment.

Sawing for small or large quantities, sawing-to-size.

Excellent customer service