Wholesale Supply Of 5120h Steel Round Bars Finishing Friendly Material - China

1 - Core advantages of 5120H steel round bars’ finishing friendliness

1 - Cutting performance optimization

- Annealed hardness ≤187HBW, 15% lower turning resistance than 4120H steel

- Chip breaking morphology rating A (ISO 3685 standard), reducing tool adhesion wear

2 - Dimensional stability guarantee

- Hardenability bandwidth ≤4HRC (end fluctuation of Jominy curve)

- Straightness of round bars after quenching and tempering ≤0.5mm/m, reducing finishing allowance

3 - Excellent surface quality

- Hot-rolled surface roughness Ra≤12.5μm, semi-finishing can be performed directly

- Cold-drawn polished round bar dimensional tolerance **h9 grade (DIN 668)

2 - 5120H steel round bars finishing process recommendation

1 - ** Turning parameter optimization**

- Roughing: VC=180m/min, f=0.3mm/rev, ap=3mm

- Finishing: VC=250m/min, f=0.1mm/rev, ap=0.2mm 2 - **Grinding solution**

- Grinding wheel selection: WA60K-V (white corundum + ceramic binder)

- Parameter setting: Vs=35m/s, workpiece speed=120rpm, feed rate=5μm/pass 3 - **Stress relief treatment**

- Vibration aging: frequency 120Hz, treatment time 30min/m

- Low temperature tempering: 180℃×2h, eliminate more than 95% of processing stress Why choose our Songshun Steel?

✅ Inventory advantage: 5120H steel round bars Φ20-300mm are always available, with 72-hour emergency delivery

✅ Technical support: Free cutting parameter calculation tool (including Mastercam post-processing file)

✅ Certification guarantee: Passed NADCAP heat treatment certification and complies with AMS 6274 standard As a model of finishing-friendly materials, 5120H steel round bars significantly reduces the overall cost of precision parts manufacturing through optimized hardenability design and purity control.

Whether it is CNC batch processing or high-precision grinding, this material can provide excellent dimensional stability and surface quality, especially suitable for automotive, hydraulic, precision machinery and other fields with strict requirements on processing efficiency and part consistency.

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Company Contact:

• Posted By: Dongguan Songshun Mould Steel Co., Ltd.

• Phone: 076985475596

• Address: 1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town, Dongguan , Guangdong , China

• Email:

• Website: https://songshunsteel.com/

• Business Description: Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc.
  
  After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter.
  
  Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service.
  
  Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on.
  
  Songshun specialized in Special Steel for almost 20 years.
  
  We can supply mold steel, high speed steel, alloy steel, free cutting steel and etc.
  
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