1255 – M2 High Speed Tool Steel

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INTERNATIONAL CLASSIFICATIONS

AWS/ASME A 5.13 E Fe6

DIN 8555: E4-UM-60-ST

FEATURES & APPLICATIONS

For repair and reclamation of high speed cutting and machining tools.

  • High hardness tool steel electrode for high speed tool steels.
  • Deposits maintain a very sharp edge.
  • Alloying elements include tungsten, molybdenum and vanadium.
  • Weld metal maintains many of its properties at elevated temperatures.
All Weld Metal Analysis (Typical Weight %)

Microstructure: In the as-welded condition, the microstructure consists of partially tempered martensite with carbides and some retained austenite.

Flux Color: Grey

CMoMnWSiVCrFe
.87.61.511.44.5Bal
Typical Mechanical Properties

Undiluted Weld Metal Maximum Value Up to:

Hardness (as welded) Rockwell C 60-62

Hot Hardness Rockwell C 56 at 1100°F (600°C)

Heat Treated Rockwell C 63-65

Welding Current & Instructions

Recommended Current: DC Reverse (+), Straight (-) or AC

Diameter (mm)3/32 (2.5)1/8 (3.25)5/32 (4.0)
Minimum Amperage4580110
Maximum Amperage90120150

Welding Techniques: When welding on tool steel, preheat the part to 1100°F (600°C) and maintain this temperature during welding. Allow parts to cool slowly.

Welding Positions: Flat, Horizontal, Vertical up

Deposition Rates:

Diameter (mm)Length (mm)Weldmetal/ ElectrodeElectrodes per lb (kg) of WeldmetalArc Time of Deposition min/lb (kg)Amperage SettingsRecovery Rate
3/32 (2.5)14″ (350).45 oz (12g)36 (78)30 (66)70120%
1/8 (3.25)14″(350).93 oz (25g)17 (38)20 (44)100120%
5/32 (4.0)14″ (350)1.2 oz (34g)13 (29)17 (37)130120%
APPROXIMATE ELECTRODE PACKAGING & DIMENSIONS
Diameter (mm)3/32 (2.5)1/8 (3.25)5/32 (4.0)
Length (mm)14″ (350)14″ (350)14″ (350)
Electrodes / lb19129
Electrodes / kg422620