HF-350

Welding Electrode HF-350

PREMIARC

HF-350 welding electrode is a hardfacing electrode for the SMAW (stick) process. This electrode is designed for build-up and increased wear resistance on work surfaces subject to intense friction.

HF-350 weld seam provides high abrasion resistance making it ideal for repair and coating of rapidly wearing components.

Generally used in bulldozer track rollers, sprockets, bucket teeth, drive gears, shafts, and machine parts made of low to medium carbon steel that require longer wear resistance.

Classification

JIS Z3251 DF2A-400-B

Product Description

Welding Electrode HF-350 KOBE STEEL is a Pearlite type deposit metal designed to provide good crack resistance as well as ease of cutting.

With a weld metal hardness of Hv350, this product is very suitable for use on axles, top wheels, and saw chains of heavy equipment such as bulldozers. 

HF-350 welding electrode also offers high metal-to-metal wear resistance, making it an ideal choice for heavy industrial applications.

The usage process should involve preheat and maintain an inter-layer temperature of at least 150°C for best results.

Product Specifications

ParametersDescription
Product NameWelding Electrode HF-350
BrandKOBELCO
Main ApplicationWelding electrode for hardfacing
Welding Electrode Size3.2 mm, 4.0 mm
Welding ProcessSMAW
Weight Per Packaging20 Kg
PolarityAC, DCEP

General Characteristics

  • HF-350 is classified as Pearlite type deposit metal and metal diversion formula.
  • It has good crack resistance and ease of cutting with the hardness of Hv350 weld metal.
  • HF-350 can be used for shafts, top wheels, and saw chains on heavy equipment (bulldozers).
  • Offers good resistance to metal-to-metal wear.
  • Preheat and maintaining an inter-layer temperature of at least 150°C is mandatory.

Welding Capability

Guide to selecting hard coating welding materials

Product
Hv (hardness)
Features
Type of wear
MTMABRHTWCAVCORHRTIMP
HF-350
200 – 400
Good crack resistance
O
x
x
O
Good machinability
ProductHF-350
Hv (Kekerasan)200 - 400
Features
  • Good crack resistance
  • Good machinability
Jenis Keausan - MTMO
Jenis Keausan - ABR
Jenis Keausan - HTWx
Jenis Keausan - CAV-
Jenis Keausan - COR-
Jenis Keausan - HRTx
Jenis Keausan - IMPO

Notes: O: Good durability ∆: Slightly lower x: Lower -: Not used for general applications

Packaging Data

diameter (mm)3.24.0
HF-350350400
carton (mm)170W × 120H × 380L mm170W × 120H × 430L mm

Guidelines for welding

Guidelines for better welding

  • It is recommended to re-dry at 300 - 350℃ for 30 - 60 minutes before use
  • Keep the arc length as short as possible
  • Use the step-back method to start the bow to prevent blowholes
  • Control the width of the webbing less than 3 - 4 times the electrode diameter
  • Rust, oil and other elements must be completely removed on the base metal before welding
  • Proper preheating and inter-pass temperatures are important to minimize cracking
  • Heating the weld at 300 - 350℃ for 10 - 30 minutes to prevent cold cracking
  • Post-hardening heat treatment (PWHT) at 550 - 750℃ is effective to prevent cold cracking and distortion

Want optimal hardfacing performance? Order HF-350 welding electrode now through our sales team.

ISO certificate

ISO 9001:2015

ISO 14001:2015

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