Ecer asks for your consent to use your personal data to:
Personalised advertising and content, advertising and content measurement, audience research and services development
Store and/or access information on a device
Your personal data will be processed and information from your device (cookies, unique identifiers, and other device data) may be stored by, accessed by and shared with 135 TCF vendor(s) and 65 ad partner(s), or used specifically by this site or app.
Some vendors may process your personal data on the basis of legitimate interest, which you can object to by do not consent. Contact our platform customer service, you can also withdraw your consent.
Your message must
be between 20-3,000 characters!
Submit Requirement
Thank You！
Your requirement has been sent. we will contact you quickly!
{"title":"SAE8620H Alloy Steel Round Bar with High Hardenability Good Weldability and OD 6","imgUrl":"https:\/\/img.chinax.com\/nimg\/95\/f6\/2b8351776418ff4cb4958bbd4695-200x200-1\/sae8620h_alloy_steel_round_bar_with_high_hardenability_good_weldability_and_od_6.jpg","attrs":{"Minimum Order Quantity":"1 Ton","Price":"US $650-1,350 \/ Ton","Diameter range":"6-630mm","Chemical composition C":"0.17-0.23%"}}
{"title":"ASTM A29\/A29m Hot Rolled Alloy Steel Round Bars SAE4340 10-350mm","imgUrl":"https:\/\/img.chinax.com\/nimg\/bb\/a1\/eb9afbd48509c13f9c6fa7b71d79-200x200-1\/astm_a29_2fa29m_hot_rolled_alloy_steel_round_bars_sae4340_10_350mm.jpg","attrs":{"Brand Name":"DELTA","Model Number":"SAE4340","Certification":"ISO","Place of Origin":"China"}}
{"title":"25Cr2MoVA Alloy Steel Round Bar Diameter 10 - 300mm Custom Cutting in Length","imgUrl":"https:\/\/img.chinax.com\/nimg\/b7\/8f\/c374af89362ac900e00ce51f86b6-200x200-1\/25cr2mova_alloy_steel_round_bar_diameter_10_300mm_custom_cutting_in_length.jpg","attrs":{"Brand Name":"DELTA","Model Number":"DIN 1.8159 (25CrMoV6-4) \/ 25Cr2MoVA","Certification":"ISO","Place of Origin":"China"}}
{"title":"EN DIN Standard 41CrAlMo7 Alloy Steel Round Bar Diameter 10 - 350mm SCM645 Alloy","imgUrl":"https:\/\/img.chinax.com\/nimg\/86\/8a\/f384d75ceea894a15b4f1ea6423b-200x200-1\/en_din_standard_41cralmo7_alloy_steel_round_bar_diameter_10_350mm_scm645_alloy.jpg","attrs":{"Brand Name":"DELTA","Model Number":"41CrAliMo7","Certification":"ISO","Place of Origin":"China"}}
{"title":"25Cr2MoVA \/ DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m","imgUrl":"https:\/\/img.chinax.com\/nimg\/55\/19\/5e678c170e39068beeabe330b547-200x200-1\/25cr2mova_2f_din1_8159_alloy_steel_round_bar_hot_rolled_diameter_20_350mm_in_6m_length.jpg","attrs":{"Brand Name":"DELTA","Model Number":"DIN 1.8159 (25CrMoV6-4) \/ 25Cr2MoVA","Certification":"ISO","Place of Origin":"China"}}
{"title":"EN 1.8507 (34CrAlMo5-10) Nitriding Steel Round Bar Diameter 10 - 300mm Custom","imgUrl":"https:\/\/img.chinax.com\/nimg\/25\/c9\/4f41b121bc96fda3bc795edf2de2-200x200-1\/en_1_8507_2834cralmo5_10_29_nitriding_steel_round_bar_diameter_10_300mm_custom_cutting.jpg","attrs":{"Brand Name":"DELTA","Model Number":"34CrAlMo5-10 \/ 1.8507","Certification":"ISO","Place of Origin":"China"}}
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.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
