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Huangshi Chengquan Metal Material Co., Ltd.

5120 Low Alloy Steel, 5120 Alloy Steel, 5120 Structural Steel manufacturer / supplier in China, offering AISI 5120 Low Carbon Alloy Steel with High Quality (SAE5120), SUS444 Steel Sheet with High Quality and Competitive Price, 1.2825 Round Tool Steel Bar and so on.

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AISI 5120 Low Carbon Alloy Steel with High Quality (SAE5120)

FOB Price: US $500-5,000 / Ton
Min. Order: 1 Ton
Min. Order FOB Price
1 Ton US $500-5,000/ Ton
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Production Capacity: 500tons Per Month
Transport Package: Apply The Shipping Packing
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: 5120
  • Standard: ASTM
  • Technique: Forged
  • Surface Treatment: Black, Grinded, Peeled, Polished, Rough Turned
  • Application: Structural Steel Bar
  • Size Range: Diameter: 20-480mm
  • Delivery Condition: Annealed, Qunched and Tempered
  • Trademark: CHENGQUAN
  • Origin: Hubei, Huangshi
  • Type: Alloy Steel Bar
  • Composition: Ferrous Steel Scrap
  • Shape: Round, Square, Flat
  • Special Use: Mold Steel
  • Similar Grades: 20cr4, SCR22
  • Quality Standard: ASTM-A29
  • Surface Condition: Black, Grinded, Peeled, Polished
  • Specification: Diameter: 20-480mm
  • HS Code: 7228600000
Product Description
Similar Grades:
20Cr4, SCr420
Round, Flat,.
Size Range: 
Diameter:20-480mm, Thickness:10-420mm.
Delivery Condition: 
Annealed, Qunched and Tempered
Surface Condition: 
Black, Grinded, Peeled, Polished

Packaging & Delivery
Packing details: In seaworthy packing, as your requirement.
Delivery  details: within 30-50 days

1:Competitive price 
2 Immediate delivery
3.Premium quality
4.Reliable service
Chemical Composition:

0.17-0.220.70-0.90<= 0.035<=0.0400.15-0.350.70-0.90
Heat Treatment
Annealing: This alloy is seldom annealed. Structures of better machinability are developed by normalizing or by isothermal transformation after forging.
Normalizing: 1650-1700ºF (900-930ºC.)
Carburizing: 1650-1740ºF (900-950ºC) and oil quench.
Hardening: Core: 1560-1620ºF (850-880ºC) and oil quench
Case: 1490-1540ºF (810-840ºC) and oil quench
Tempering: 340-410ºF (170-210ºC.)
Machinability : The alloy is best machined in the normalized condition prior to case hardening.
Weldability: The alloy is easily welded, but should be welded prior to case hardening.
5120 steel has high strength and hardenability, in water the critical full hardening diameters are 4-22mm , in oil the critical full hardening diameters are 11-40mm. But its toughness is poorer.This steel in carburiz ation still has grain growth tendency. Quenching cooling directly has big  influence to impact toughness. So after carburizing, 5120 steel need 2 times quenching to improve heart toughness of parts, no temper brittleness. The coldstraining plasticity of 5120 steel is high, can be done wiredrawing in cold state. The machinability in high temperature normalizing or quenching and tempering condition is good, but after annealing it will be poor. 5120 steel is pearlite, the weldability  is good, commonly no need to do heat treatment after welding. However, for the parts whose thickness is more than 15 mm, it should do the preheating to 100 ~ 150 ºC before welding, also after welding it is no need to do heat treatment.

5120 steel is mainly used for making cam shaft,driven gears of small tractor. This kind of steel also is mostly used in the manufacturing of the high demand  heart intensity, surface under wear, section under 30 mm or complex and not big load carburized parts (oil quenching), such as: machine tool transmission gear, gear shaft, worm and piston pins, claw clutch, etc.
ASTM A29M 5120 steel's equivalent material in different standard.
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