Weartech SHS9700P

SHS9700P is an iron based steel alloy with a near nanoscale (submicron) microstructure that features good abrasion and fine particle erosion resistance with no high-cost nickel, tungsten and molybdenum in the material chemistry

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Description

SHS9700P is an iron-based alloy for PAW hardfacing and wear protection applications that has been designed to be free of high-cost strategic elements such as nickel, tungsten and molybdenum. SHS9700P is an alternative to nickel based PAW alloys with up to 40% tungsten carbide for use in moderate to high wear applications. SHS9700P allows high undercooling to be achieved during welding, resulting in considerable refinement of the microstructure down to a near nanosize (submicron) range. Unlike conventional weld overlay materials which are macrocomposites that contain hard particles and general carbides in a binder, the refined microstructure of SHS9700P does not incorporate distinct hard particles in a binder and is a uniformly hard matrix when welded. This allows SHS9700P to provide vastly improved hardness/wear resistance and last significantly longer than conventional macrocomposites.

Key Performance Characteristics

  • 67 - 69 HRC single and double pass weld deposits
  • Economical iron-based alternative to nickel based materials containing tungsten carbide
  • Good resistance to abrasion and erosion from fine particles
  • Highly refined microstructure

High Hardness

SHS9700P will exhibit higher hardness when applied in multiple layers. The micrograph image to the right shows how 68 HRC hardness develops within microns of the weld overlay interface. HRC hardness data points in the micrograph were measured from a single pass SHS9700P weld overlay applied to A36 steel plate.

Extreme Abrasion/Erosion Resistance

SHS9700P can be built up in as many weld passes as necessary with the second and all subsequent layers providing maximum wear resistance of typical mass loss of 0.13g in ASTM G65-04 Abrasion Wear Tests.

Damage Tolerance

The superior toughness of SHS9700P occurs from the in situ formation of high volume fraction of refined complex borocarbide phases during welding which are surrounded by ductile phases. The borocarbide phases, which form during solidification, are completely wetted by the matrix and prevent premature pull-out, delamination and crack nucleation. The refined nature of the borocarbide phases allows the reduction of stress concentration sites and the ductile matrix supplies effective crack blunting and bridging.

Application Process

PAW Powder for Weld Overlay for Hardfacing.

Material Chemistry (wt%)

Chromium < 21%
Boron < 7%
Niobium < 6%
Molybdenum < 6%
Aluminum < 5%
Carbon < 2%
Manganese < 2%
Silicon < 2%
Iron Balance
Molybdenum < 6%
Aluminum < 5%

Rockwell C (HRC) Hardness

67 - 69 HRC

Wear Resistance

ASTM G65-04 Procedure A Typical mass loss 0.13g

Weld Deposit Properties

Chromium (g/cm³) 7.36
Deposition Efficiency 80 - 85%

Impact Resistance

Drop Impact Testing: Passed multiple impacts at 165 ft•lbs