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// SC-HF Series · Flux-Cored Hardfacing

Hardfacing wires that defeat wear by design.

The SC-HF range is a complete carbide-spectrum portfolio — from tough martensitic build-up grades through chromium and complex carbide overlays to the ultimate tungsten carbide composite. Engineered around the deposit chemistry, not the wire.

Find my grade → Request data sheets

[ 01 / Range ]

Five grades, one carbide spectrum.

Each SC-HF grade is engineered for a specific failure mode. Mix grades on the same component — build-up first, overlay last.

Grade	Surface hardness	Deposit chemistry	Best applied to
SC-HF 600 Martensitic build-up	55 – 60 HRC	Fe – 6Cr – 1.5C – 1Mo Tempered martensite, fine carbide	Build-up under carbide overlays. Mild abrasion + moderate impact. Bucket bodies, dipper sides, conveyor pans.
SC-HF 720 Chromium carbide overlay	58 – 63 HRC	Fe – 28Cr – 4C – 0.5Mn Cr₇C₃ in austenitic matrix	Severe high-stress abrasion. The mining workhorse — chutes, GET, screen panels, mill liners, dragline buckets.
SC-HF 850 Complex carbide	62 – 67 HRC	Fe – 25Cr – 5Nb – 4C – 1Mo Cr₇C₃ + NbC primary carbides	Extreme abrasion with secondary impact. Niobium carbides resist fracture. Crusher hammers, sinter components, kiln rolls.
SC-HF 980-W Tungsten carbide composite	68 – 72 HRC	Fe – W carbide granules Macro WC particles in tough matrix	The hardest deposit available. Gouging and cutting. Drill stabilisers, augers, soil-engaging tools, mill scraper edges.
SC-HF MN13 Austenitic manganese	18 → 55+ HRC	Fe – 14Mn – 0.7C Hadfield-style austenitic, work-hardens	Pure impact loading. Surface hardens under blows; core stays tough. Rail crossings, jaw plates, hammers, manganese castings.

Hardness comparison

As-deposited Work-hardened

SC-HF 600 Martensitic

55–60

SC-HF 720 Cr-carbide

58–63

SC-HF 850 Complex

62–67

SC-HF 980-W WC composite

68–72

SC-HF MN13 Manganese

18→55+

0 HRC305072 HRC

[ 02 / Procedure ]

Welding parameters that work first time.

Starting points for your WPS. Our engineers will refine these for your specific component, position and substrate.

SC-HF 720 — typical FCAW-S parameters

Wire diameter2.4 mm (3/32")

PolarityDC+ (DCEP)

Voltage28 – 32 V

Current280 – 360 A

Wire feed3.5 – 5.5 m/min

Stick-out (CTWD)25 – 35 mm

Travel speed25 – 35 cm/min

Deposition rate~ 5.0 kg/h

Max thickness2 layers (≈ 8 mm)

// Cr-carbide overlays develop check-cracking by design — these stress-relief cracks are normal and do not propagate into the substrate. Do not attempt to weld over them.

SC-HF MN13 — typical FCAW-S parameters

Wire diameter2.0 mm (5/64")

PolarityDC+ (DCEP)

Voltage24 – 28 V

Current200 – 280 A

Wire feed4.0 – 6.0 m/min

Stick-out (CTWD)20 – 30 mm

Interpass temp≤ 250 °C — keep cool

Pre-heatNone — quench between passes

Deposition rate~ 3.2 kg/h

// Manganese deposits must be kept cool to retain austenitic structure. Skip-weld pattern, water quench between passes, and never preheat.

[ 03 / Field results ]

Tested where it matters.

A typical result from an iron ore comminution circuit running SC-HF 720 against a competitor chromium carbide.

Triple the rebuild interval on a primary crusher chute.

A Pilbara iron ore client was rebuilding the upper section of their primary crusher transfer chute every 6 weeks at production tonnages of around 7,500 t/h. The wear surface was a competitor 5%C / 26%Cr carbide overlay applied to 12mm Hardox 450 backing plate.

Syncore's application engineers re-specified the deposit using SC-HF 720 (1.6mm, FCAW-S) at a tighter weave pattern with reduced heat input. The rebuild interval increased to 19 weeks at the same throughput, and the chute now exceeds shutdown intervals for the first time in the client's operating history.

Discuss your application → More mining results

// Case study · Iron ore · Pilbara

Primary crusher transfer chute, upper section.

SC-HF 720 chromium carbide overlay, 1.6mm wire, FCAW-S, single layer over SC-HF 600 build-up.

19 wks

Rebuild interval

+217%

Vs. previous

7,500 t/h

Throughput

[ 04 / Supply ]

Packed how you need it.

Spool, drum or coil. Sea-freight protection on every shipment.

Plastic spools

Standard 15kg and 22kg layer-wound spools for site work and small fabrication. Internally locked to prevent shipping deformation.

// 1.2 – 2.4 mm · 15 / 22 kg

Bulk drums

250kg and 500kg drums for high-volume robotic and mechanised applications. Uninterrupted welding, no spool change-overs.

// 1.2 – 2.0 mm · 250 / 500 kg

Coils & reels

Heavy SAW reels (60kg+) and large-diameter coils for submerged arc applications. VCI-protected for long sea voyages.

// 2.4 – 4.0 mm · 60 – 250 kg

// Sample & spec

Trial spool, full spec sheet, or both.

Tell us your component, your tonnage and your current consumable. We'll send a sample spool, a recommended welding procedure, and the certifications your QA team needs.

Request samples → Use the wire selector