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Durable 38CrMoAlA Screw & Barrel with HRC58-60 Hardness – PP Strapping Line
Durable 38CrMoAlA Screw & Barrel with HRC58-60 Hardness – PP Strapping Line
Specifications
Brand Name :
CHUQI
Model Number :
CQ-SPP120-6
Place of Origin :
CHINA
MOQ :
1SET
Payment Terms :
T/T
Supply Ability :
10SETS
Delivery Time :
60DAYS
Packaging Details :
WOODEN BOX
Screw Material :
38CrMoAlA
Barrel Material :
38CrMoAlA
Surface Treatment :
Nitrided
Surface Hardness :
HRC58-60
Plasticizing Uniformity :
≥99%
Wear Life :
Long
Description
Durable 38CrMoAlA Screw & Barrel with HRC58-60 Surface Hardness
Product Introduction

The screw and barrel are the "heart" of the extruder. Their wear resistance directly determines the equipment's service life and long-term stability. The screw and barrel of this production line are both made of high-quality 38CrMoAlA alloy steel, precision machined and then fully nitrided, achieving a surface hardness of HRC58-60.

This high-hardness, high-wear-resistance design effectively withstands long-term abrasion from PP materials (especially those containing glass fiber, fillers, or regrind), significantly extending the replacement cycle of core components. Additionally, the nitrided layer offers good corrosion resistance, suitable for processing modified PP such as flame-retardant grades.

Main Specifications
  • Screw Material: 38CrMoAlA Alloy Steel
  • Barrel Material: 38CrMoAlA Alloy Steel
  • Surface Treatment: Full nitriding
  • Surface Hardness: HRC 58-60
  • Plasticizing Uniformity: ≥99%
  • Screw Diameter: φ120mm
  • L/D Ratio: 30:1
Technical Parameters
Item Parameter
Screw Material 38CrMoAlA Alloy Steel
Barrel Material 38CrMoAlA Alloy Steel
Surface Treatment Nitriding
Surface Hardness HRC 58 - 60
Plasticizing Uniformity ≥ 99%
Screw Diameter φ120 mm
L/D Ratio 30 : 1
Screw Speed Range 10 - 90 rpm
Maximum Output 220-240 kg/h
Customer Q&A
Q: What is special about 38CrMoAlA material?
A: It is a premium nitriding steel containing aluminum. After nitriding, it forms an extremely hard AlN layer, providing high surface hardness while maintaining good core toughness. It also has good fatigue and corrosion resistance, making it the preferred material for extruder screws and barrels.
Q: How long does HRC58-60 hardness last? Does the nitrided layer wear out?
A: The nitrided layer depth is typically 0.4-0.6mm. When processing pure PP or low-filled materials, wear is extremely slow, and service life can reach 5-10 years. Processing glass fiber-reinforced materials accelerates wear, but still far exceeds ordinary steels.
Q: Is this material corrosion-resistant when processing flame-retardant PP?
A: Nitrided 38CrMoAlA has good corrosion resistance and can resist attack from most flame retardant decomposition products. For highly corrosive formulations, higher-grade corrosion-resistant materials (e.g., duplex stainless steel) may be recommended; please specify during procurement.
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Durable 38CrMoAlA Screw & Barrel with HRC58-60 Hardness – PP Strapping Line

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Product Detail
Brand Name :
CHUQI
Model Number :
CQ-SPP120-6
Place of Origin :
CHINA
MOQ :
1SET
Payment Terms :
T/T
Supply Ability :
10SETS
Contact Supplier
Durable 38CrMoAlA Screw & Barrel with HRC58-60 Hardness – PP Strapping Line

Jiaxing Chuanqi Machinery Equipment Co., Ltd.

Verified Supplier
3 Years
zhejiang, jiaxing
Since 2012
Business Type :
Manufacturer
Main Products :
PET Strap Winder, PP Strap Winder, Paper Strapping Production Line
Total Annual :
5000000-8000000
Employee Number :
50~60
Certification Level :
Verified Supplier
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