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{"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 8620H Alloy Round Bar | UNS G86200 Bar | 20NiCrMo2-2 Sncm220
SAE 8620 is an alloy construction steel with excellent hardenability, good weldability,
and superior machinability. This low carbon nickel chromium molybdenum alloy offers
outstanding carburized properties, formability, and weldability, making it the most
widely used carburizing alloy in industrial applications.
Key Features
Excellent machinability performance
Superior cold strain plasticity
Good weldability characteristics
High hardenability without post-tempering fragility
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
Carburising
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.
Post-heat treatment machining is minimized to preserve the hardened case,
typically limited to grinding operations.
Welding
Suitable for conventional gas or arc welding methods. Preheating at 200°C is recommended,
followed by post-weld heat treatment according to approved procedures.
Cold Working
Cold working is performed in the annealed condition using conventional methods,
completed to close tolerances before heat treatment or carburizing.
Applications
This alloy is widely used in transmission systems, tractor motors, and automotive components.
Ideal for high-class carburization and cyanide carburizing parts including:
Gears and pinions
Shafts and bearings
Piston rings and ring gears
Crankshafts
Oil drilling components
Mining claws and cones
Available Sizes and Conditions
Round Bar Diameter: 12-380mm Available Forms: Round bars, flat bars, plates, blocks Conditions: Pre-hardened, hot rolled, annealed, quenched and tempered Surface Conditions: Black, pre-machined, grinding, polish
Quality Assurance
We source materials exclusively from certified steel manufacturers to ensure consistent
quality and performance. Our quality management system is certified in accordance with
ISO 9001, with regular audits and recertification to maintain the highest standards.
Our Services
Quality special steel for all industries
Orders of any size and length with fast shipping
Unique inventory of specialty steel
Value-added services: metal cutting, sizing, machining, heat treatment
Sawing services for small or large quantities
Excellent customer service and support
Product Images
Note: The information presented represents typical or average values and is not a guarantee
of maximum or minimum values. 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...
