20CrNiMo Sncm220/1.6523 8620 Alloy Steel Sheet & Plate

• Technique: Hot Rolled
• Standard: AISI, JIS, ASTM, DIN, BS, GB
• Certification: IS0, RoHS, ABS
• Payment Term: 30% Tt Deposit, Balance Against Bl Copy
• Length: 3000-5800mm
• Delivery Date: 30 Days
• Model NO.: 8620
• Ex-Stock: No
• Ut Standard: Sep 1921-84 D/D
• Grain Size: ASTM E112
• Non-Metallic Inclusiton: ASTM E45
• Form: Round Bars/ Flat Bar / Blocks/ Tube
• Process: Eaf+Lf+Vd+Forged+Heat Treatment(Optional)
• Technology: Hot Rolled/ Forged/ Cold Drawn
• Heat Treatment: Normalized;Annealed ;Quenched ;Tempered
• Surface: Black; Peeled; Polished; Machined; Grinded; Turne
• Test: Ensile Strength, Yield Strength, Elongation
• Certificate: ISO/ Mill Certificate
• Transport Package: Seaworthy Package
• Trademark: Qilu
• Origin: China
• HS Code: 7228400000
• Production Capacity: 400, 000ton/Year

Product Description

 

JIS SNCM220 | DIN 1.6523/21NiCrMo2 | AISI 8620 | BS 805M20 Engineering Steel

Quick Details

1: 8620 steel introduction

    AISI 8620 Steel is a low alloy nickel, chromium, molybdenum case hardening steel, generally supplied in the as rolled condition with a maximum hardness HB 255max. SAE steel 8620 offers high external strength and good internal strength, making it highly wear resistant. AISI 8620 steel has a higher core strength than grades 8615 and 8617.SAE 8620 alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. Pre hardened and tempered (uncarburized) 8620 can be further surface hardened by nitriding but will not respond satisfactorily to flame or induction hardening due to its low carbon content.

 

2: 8620 Steel equivalent

Country	Japan	Germany	Britain	USA
Standard	JIS G4103	DIN 1654	BS970	ASTM A29
Grade	SNCM220	21NiCrMo2/1.6523	805M20	8620

 
3: 8620 steel chemical composition

Grade	C	Si	Mn	P	S	Cr	Mo	Ni
8620	0.18-0.23	0.15-0.35	0.7-0.9	0.035	0.04	0.4-0.6	0.15-0.25	0.4-0.7
1.6523	0.17-0.23	0.4	0.65-0.95	0.035	0.035	0.4-0.7	0.15-0.25	0.4-0.7
805M20	0.17-0.23	0.1-0.4	0.6-0.9	0.03	0.03	0.35-0.65	0.15-0.3	0.4-0.7
SNCM220	0.17-0.23	0.15-0.35	0.6-0.9	0.03	0.03	0.4-0.65	0.15-0.25	0.4-0.7

 
4: 8620 steel mechanical properties  

    The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.

 

5: 8620 steel overviews

 

Size	Round	Dia 6-1200mm
	Plate/Flat/Block	Thickness 6mm-500mm
		Width 20mm-1000mm
Heat treatment	Normalized ; Annealed ; Quenched ; Tempered
Surface condition	Black; Peeled; Polished; Machined; Grinded; Turned; Milled
Delivery condition	Forged; Hot rolled; Cold drawn
Test	Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc.
Payment terms	T/T;L/C;/Money gram/ Paypal
Trade terms	FOB; CIF; C&F; etc..
Delivery time	30-45 days
Application	8620 alloy steels are used for  Arbors, Bearings, Bushings, Cam Shafts, Differential Pinions, Guide Pins, King Pins, Pistons Pins, Gears, Splined Shafts, Ratchets, Sleeves and other applications where it is helpful to have a steel that can be readily machined and carburized to controlled case depths.

 

 

6. ASTM 8620 Steel Heat Treatment
Annealing
    AISI 8620 steel may be given a full anneal by heat to 820ºC - 850ºC, and hold until temperature is uniform throughout the section and cool in furnace or air cooled.
Tempering
    Tempering of heat treated and water quenched parts of 8620 steels (not carburized) is done at 400 F to 1300 F to improve case toughness with minimal effect on its hardness. This will also reduce the possibility of grinding cracks.
Hardening
    The AISI steel 8620 will be austenitized at around 840°C - 870°C, and oil or water quenched depending upon section size and intricacy. Cool in Air or Oil required.
Normalizing
    1675oF (910oC) and air cool. This is another method of improving machinability in 8620 material; normalizing might also be used prior to case hardening.

 

 

7: Delivery condition

    For hot forged  bar, usually the delivery condition is hot forged, annealed/QT, rough turned/Black surface.

    For hot rolled bar, usually the delivery condition is hot rolled, annealed/QT, Black surface.

 

Hunan Qilu Industrial Co., Ltd has the capacity to forge round steel, steel flat, square steel, module, shaft and roller, etc. The main specifications of the products include Φ80-1000mm forging materials and 80-1200mm square billets and which the maximum piece weight can reach 50T.



Hunan Qilu Industrial Co., Ltd were already engaged in exporting steel for 11 years, could supply a great variety of hot forged, hot rolled and cold drawn Steels,  including engineering steel, cold work tool steel, hot work tool steel, plastic mold steel, spring steel, high speed steel, stainless steel etc., besides Qilu Industrial also has their own heating treatment shop and machining shop to provide heating and cutting service.

Since 2008 year, Hunan Qilu Industrial has the right to export all FORGED STEEL behalf of Qilu Speical Steel Co.,ltd which is specialized in smelting and forging of special steel since 1965 year, now Qilu special steel is one of the biggest manufacturer of forged product in China.The forged products are used in Automotive, Aerospace, Power Generation, Oil & Gas, Transportation and Industrial. We already set up the warehouse in Wuxi and Dongguan city, more than 20000 tons ex-stock could be supplied with kinds of size.

Qilu Industrial is the professional one-stop steel manufacturer, stockist and exporter in China, our customers spread all over the world, include West Europe, North America, South America, Asia, Middle Asia, Africa, Australia, etc.


The company owns advanced special steel smelting facilities and forging processing equipments, the main steel-making equipment include 2 sets of 50t ultra-high power electric arc furnaces,2 sets of 60t LF refining furnaces,1 set of 60t vacuum degassing refining furnace and 4 sets of 1-20t electroslag re-melting furnaces.
The main forging equipments mainly include:3 sets of 5t electro-hydraulic hammers, 1 set of high-speed forging units of 800t,1600t,2000t and 4500t respectively.



Hunan Qilu Industrial CO., LTD
Web: qilusteel.en.made-in-china.com