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{"title":"Polished Surface SAE 8620H Alloy Steel Round Bar with High Hardenability and","imgUrl":"https:\/\/img.chinax.com\/nimg\/40\/b6\/a596f0bb2f96cb75ff7154fee51b-200x200-1\/polished_surface_sae_8620h_alloy_steel_round_bar_with_high_hardenability_and.jpg","attrs":{"Minimum Order Quantity":"1 Ton","Price":"US $720-1,350 \/ Ton","Model NO.":"SAE8620H","Surface Treatment":"Polished"}}
{"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 with high hardenability, excellent machinability, cold strain plasticity, and good weldability. This low carbon nickel chromium molybdenum alloy offers superior carburized properties, formability, and weldability, making it the most widely used carburizing alloy.
Key Features
Excellent machinability performance
Superior cold strain plasticity
Good weldability characteristics
High hardenability properties
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
-
-
-
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
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
Applications
Widely used in transmission systems, tractor motors, and small-to-medium automotive applications. Ideal for gears, shafts, bearings, piston rings, ring gears, crankshafts, and other components requiring hard carburized cases with tough cores.
Available Sizes
Round Bar Diameter: 12-380mm
Available in various conditions: pre-hardened, hot rolled, annealed, quenched and tempered, with surface conditions including black, pre-machined, grinding, and polish.
Quality Assurance & Services
Our Commitment
We source materials exclusively from certified steel manufacturers to ensure consistent quality. Our ISO 9001 certified quality management system guarantees competitive products that meet demanding specifications.
Value-Added Services
Metal cutting and sizing
Machining (blanking, milling, grinding)
Heat treatment services
Sawing for small or large quantities
Sawing-to-size capabilities
Delivery & Support
We prioritize speedy and timely delivery for all orders, whether raw materials or finished products with machining or heat treatment. Our extensive inventory and efficient logistics ensure shortest possible lead times.
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...