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SAE8620H Alloy Steel Round Bar with High Hardenability Good Weldability and OD 6-630mm for Carburized Applications

Quantité de commande min	1 tonne
Prix	US $650-1,350 / Ton

Détails sur le produit

Plage de diamètre	6-630mm	Composition chimique C	0,17-0,23%
Composition chimique SI	0,17-0,37%	Composition chimique MN	0,6-0,95%
Composition chimique cr	00,4-0,7%	Composition chimique MO	0,20-0,30%
Résistance à la traction	≥980 MPa	Limite d'élasticité	≥ 785 Mpa
Élongation	≥9%	Zone de réduction	≥40%
Impact de l'énergie	≥47 J	Élasticité du module	210 x 10^3 N/mm2
Densité	70,86 g/cm3	Tempérament de formation à chaud	1150-850°C
Température de recuit doux	650-700°C
Mettre en évidence	High Hardenability Alloy Steel Round Bar , Good Weldability SAE8620H Steel Bar , OD 6-630mm 20CrNiMo Alloy Bar

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Description de produit

SAE8620H 20CrNiMo Alloy Steel Round Bar

SAE8620H Alloy Solid Round Bar | UNS G86200 Bar

SAE 8620 is an alloy construction steel according to Chinese Standard (Code: A50202). This steel round bar offers high hardenability, maintains toughness after tempering, provides good weldability, and features excellent machinability and cold strain plasticity.

Product Features

Excellent machinability performance

Superior cold strain plasticity

Good weldability characteristics

High hardenability properties

Material Specifications

International Standards Equivalents

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

Chemical Composition (Weight %)

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

Detailed Chemical Composition

Grades	C	Si	Mn	P	S	Cr	Mo	Cu	Ni
20CrNiMo	0.17-0.23	0.17-0.37	0.6-0.95	≤0.035	≤0.035	0.4-0.7	0.20-0.30	≤0.30	/

Mechanical Properties

Quenching Temperature: 850°C (Oil Cooled)

Tempering: 200°C (Air Cooled)

Property	Value
Tensile Strength σb (MPa)	≥980(100)
Yield Strength σs (MPa)	≥785(80)
Elongation δ5 (%)	≥9
Reduction of Area ψ (%)	≥40
Akv (J)	≥47

Physical Properties

Modulus of Elasticity: 210 × 10³ N/mm²

Density: 7.86 g/cm³

Heat Treatment Specifications

Soft Annealing

Heat to 650-700°C, cool slowly. Maximum Brinell hardness: 212

Heat Treatment Processes

Treatment	Temperature	Cooling
Case Hardening	880-980°C	Oil (water), hot bath 160-250°C
Carburizing	880-980°C	Oil (water), hot bath 160-250°C
Direct Hardening	880-980°C	Oil, hot bath 160-250°C
Core Refining	860-900°C	Oil, hot bath 160-250°C
Core Refining	780-820°C	Oil, hot bath 160-250°C
Tempering	150-200°C	Air

Hardenability Data

Distance From Quenched End (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	-	-	-	-	-	-	-

Manufacturing Processes

Forging

Hot forming temperature: 1150-850°C

Machinability

Machining is performed prior to carburizing to achieve close tolerances. After heat treatment, finish machining is minimized to preserve the hardened case. Conventional machining methods are suitable prior to heat treatment.

Welding

Conventional gas or arc welding methods are suitable. Preheating at 200°C is beneficial, with subsequent heating recommended after welding.

Cold Working

Cold working is performed in the annealed condition using conventional methods, completed to close tolerances before heat treatment.

Applications

Widely used in transmission systems, tractor motors, and small-to-medium automotive applications. Suitable for high-class carburization and cyanide carburizing parts including oil drilling equipment, mining claws, and cones.

Common applications include carburized gears, pinions, shafts, bearings, piston rings, ring gears, crankshafts, and other components requiring hard carburized cases with tough cores.

Available Sizes

Round Bar Diameter: 12-380mm

Material Conditions & Forms

Available in various conditions: pre-hardened, hot rolled, annealed, quenched and tempered. Surface conditions include black, pre-machined, grinding, and polished finishes. Forms include round bars, flat bars, plates, and blocks.

Quality Assurance

Materials sourced exclusively from government-owned steel mills to ensure consistent quality and reliability.

ISO 9001 certified quality management system with regular audits and recertification.

Competitive pricing combined with superior product quality.

Our Services

Speedy and timely delivery with shortest lead times

Unique inventory of specialty steel products

Value-added services: metal cutting, sizing, machining, heat treatment

Sawing services for small or large quantities

Excellent customer service and support

Orders of any size and length accommodated

Product Images

The information presented represents typical or average values and is not a guarantee of maximum or minimum specifications. Applications suggested are for illustration purposes only.

Étiquettes:

SAE8620H Alloy Steel Round Bar with High Hardenability Good Weldability and OD 6-630mm for Carburized Applications

High Hardenability Alloy Steel Round Bar

Good Weldability SAE8620H Steel Bar

OD 6-630mm 20CrNiMo Alloy Bar