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20crnimoh Alloy Steel Mechanical Precision Steel Tubing

  • 20crnimoh Alloy Steel Mechanical Precision Steel Tubing
  • 20crnimoh Alloy Steel Mechanical Precision Steel Tubing
  • 20crnimoh Alloy Steel Mechanical Precision Steel Tubing
  • 20crnimoh Alloy Steel Mechanical Precision Steel Tubing

20crnimoh Alloy Steel Mechanical Precision Steel Tubing

    Payment Type: L/C,T/T,D/P,Paypal,Western Union
    Terms of Trade: FOB,CFR,CIF
    Min. Order: 1 Ton
    Delivery Time: 30 Days
    Packaging: Bundles Packing with plastic bags wrapped
    Productivity: 5000tons per month
    Brand: HuiJie
    Transportation: Ocean,Land
    Place of Origin: Made in China
    Certificate: TS16949 ISO9001
    HS Code: 7304.59.90
    Port: Ningbo,Shanghai

Basic Info

Model No.: 20CrNiMoH 20CrNiMo

Product Description

20CrNiMoH/8620H carburizing Alloy steel tube by cold drawn and cold rolled process for anti-friction bearing

Products Description:

20CrNiMoH/8620H properties is a carburing alloy steel specification as ASTM A534/GB3077

Other Related Specifications ASTM A295/A295M DIN EN 10083/3 JIS G4053 DIN17210

Chemical compostion

Mass fraction (%):
Carbon C: 0.17-0.23
Si: 0.17-0.37
Mn: 0.60-0.95
Sulfur s: allowable residual content ≤ 0.035
P: allowable residual content ≤ 0.035
Cr: 0.40-0.70
Ni: 0.25-0.75
Mo: 0.20-0.30
Cu: allowable residual content ≤ 0.30

Mechanical property:
Sample blank size
[heat treatment]
Quenching temperature (℃): 850; coolant: Oil
Tempering heating temperature (℃): 200; coolant: empty
20CrNiMo round steel
20CrNiMo round steel
Tensile strength σ B (MPA): ≥ 980 (100)
Yield strength σ s (MPA): ≥ 785 (80)
Elongation δ 5 (%): ≥ 9
Reduction of area ψ (%): ≥ 40
Impact energy Akv (J): ≥ 47
Impact toughness value α kV (J / cm2): ≥ 59 (6) Brinell hardness (hbs100 / 3000) (annealing or high temperature tempering state): ≥ 197
Delivery status: delivered in heat treatment (normalizing, annealing or high temperature tempering) or non heat treatment status, which shall be indicated in the contract.
20CrNiMo steel was originally 8620 in American AISI and SAE standards. The hardenability is similar to that of 20crni steel. Although the Ni content of the steel is half of that of 20crni steel, the upper part of the isothermal transformation curve of austenite moves to the right due to the addition of a small amount of Mo element, and the hardenability of the steel is still very good due to the proper increase of Mn content, and the strength is also higher than that of 20crni steel. It is often used to manufacture the gears in the engine and transmission system of small and medium-sized automobiles and tractors; it can also replace 12crni3 steel to manufacture the carburizing parts and cyaniding parts with high core performance, such as the claws and cones of the roller bits used in oil drilling and metallurgical open pit mining. 20CrNiMo is resistant to certain temperature due to its molybdenum content, in addition to its good comprehensive properties. The forging of connecting rod and valve section of gear rotor internal combustion engine used for manufacturing steam turbine.
Delivery status: hot rolled or forged steel shall be delivered in hot-rolled (forged) or annealed state. Cold drawn steel

is delivered in annealed condition.

Cold drawn and Cold rolled bearing tubes tolerance control level
Outer Diameter Diameter Tolerance Outer Diameter Diameter Tolerance
(mm) (mm) (mm) (mm)
≤12.70 ±0.08 >50.80~63.5 ±0.25
12.7~25.40 ±0.10 >63.50~76.20 ±0.30
>25.4~38.10 ±0.15 >76.20~101.60 ±0.40
>38.1~50.80 ±0.20 >101.60~203.20 ±0.50
Remark:Tolrance on outer diameter and Inner diameter,wall thickness
can be specified by customer requested,


AISI8620 bearing tubes

Delivery Condition: +C, +LC, +SR, +A, +N

Production Size Range:

OD: 10-210mm
WT: 2-30mm
Length: 2-5.8m

Bearing and Gearing Steel Tube Characteristic:
High strength
Good Surface Quality
Stable quality
Smooth Roughness

Production Processs:

Seamless Cold Drawn or Seamless Cold Rolled + Heat Treatment or Stress released control

Ningbo Huijie Steel Pipe Manufacturing Co.,Ltd


Ningbo Huijie Steel Pipe Manufacturing Co.,Ltd was Founded in 2002, the company mainly manufacturing seamless carbon steel tubes and alloy steel tubes, The products are mainly used in automobile, machinery, bearing, high pressure boiler and other industries. In 2011, our company built a new factory focusing on the production of bearing steel tubes,Which covers an area of 45000 ㎡, with capacity of 60,000 tons/year, equipment and environmental protection standards reach the advanced level of the domestic counterparts, has passed ISO/TS 16949 quality management system certification. The company has more than 500 employees, more than 80 professional technical personnel, the key process is equipped with PLC automatic temperature control perforation heating, spheroidizing annealing furnace, recrystallization annealing furnace, and a variety of supporting cold rolling, cold drawing processing lines. Equipped with advanced direct reading spectrum, metallographic analysis, hardness test and other physical and chemical testing equipments and eddy current, ultrasonic non-destructive testing equipments to reach the quality of products with superior assurance conditions. From 2018,Our annual production output about 75,000tons of bearing steel tubes and carbon steel tubes, By 2019, the group's steel pipe production capacity is expected to exceed 110,000 tons. Since 2018,Ningbo Huijie start for exporting through our own branch company Ningbo pipeway,Till now,we exported bearing steel tubes and Carbon steel pipes to Canada, USA, Mexico, Peru, Chile, Thailand, Malaysia, Russia, Iran, Germany, Spain, Netherland, Japan, South Korea Australia, etc about 12 countries.

Company Info

  • Company Name: Ningbo Huijie Steel Pipe Manufacturing Co.,Ltd
  • Representative: Mr.Kevin
  • Product/Service: Seamless Bearing Tubes , Mining Drill Pipes , Boiler Steel Tubes , Alloy Mechanical Tubing , Precision Steel tubes , Stainless Steel tubes
  • Capital (Million US $): 1.45
  • Year Established: 2002
  • Total Annual Sales Volume (Million US $): Above US$100 Million
  • Export Percentage: 11% - 20%
  • Total Annual Purchase Volume (Million US $): Above US$100 Million
  • No. of Production Lines: 50
  • No. of R&D Staff: 41 -50 People
  • No. of QC Staff: 51 -60 People
  • OEM Services Provided: yes
  • Factory Size (Sq.meters): 50,000-100,000 square meters
  • Factory Location: Industrial Park,Zhangting Town,Yuyao City,Ningbo City,Zhejiang Province,China
  • Contact Person: Mr. Kevin
  • Tel: 86-0574-87491308
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