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{"title":"SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for","imgUrl":"https:\/\/img.chinax.com\/nimg\/f3\/89\/ba085d5584241f0f59de4830c511-200x200-1\/sae8640_alloy_steel_round_bar_with_polished_surface_and_high_hardenability_for.jpg","attrs":{"Minimum Order Quantity":"1 Ton","Price":"US $850-1,350 \/ Ton","Model NO.":"8640","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 8620H Alloy Round Bar is a low carbon nickel chromium molybdenum alloy steel with excellent carburized properties, formability, and weldability. This widely used carburizing alloy offers high strength case and core toughness due to its nickel content, while chromium and molybdenum provide superior surface hardness and wear resistance.
Key Features
Excellent machinability performance
Superior cold strain plasticity
Good weldability characteristics
High hardenability properties
International Standards Equivalents
Chinese (GB)
American (AISI)
German (DIN)
Japanese (JIS)
20CrNiMo
SAE8620
1.6523
/
Chemical Composition
Grade
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
Property
Value
Quenching Temperature
850°C (oil cooled)
Tempering
200°C (air cooled)
Tensile Strength σb (MPa)
≥980(100)
Yield Strength σs (MPa)
≥785(80)
Elongation δ5 (%)
≥9
Reduction of Area ψ (%)
≥40
Akv (J)
≥47
Typical Applications
Widely used in transmission systems, tractor motors, and small to medium automotive components. Serves as an alternative to 12CrNi3 for high-class carburization and cyanide carburizing parts including oil drilling equipment, mining claws, and cones. Commonly applied in carburized gears, pinions, shafts, bearings, piston rings, ring gears, and crankshafts.
Available Stock Sizes
Round Bar Diameter: 12-380mm
Material Conditions & Forms
Our steel materials are available in various forms including round bars, flat bars, plates, and blocks. Conditions range from pre-hardened, hot rolled, annealed, quenched and tempered to surface finishes such as black, pre-machined, grinding, and polished.
Quality Assurance & Commitment
Government-Certified Quality
We source materials exclusively from certified steel manufacturers to ensure consistent, high-quality steel products. Our ISO 9001 certified quality management system undergoes regular audits and recertification.
Reliable Delivery
We prioritize timely delivery for all orders, whether raw materials or finished products with machining or heat treatment, ensuring shortest possible lead times.
Comprehensive Services
We provide specialty steel for all industries with value-added services including metal cutting, sizing, machining (blanking, milling, grinding), heat treatment, and sawing for any quantity requirements.
Product Gallery
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...
