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

C Mo Mn W Si V Cr Fe
.8 7 .6 1.5 1 1.4 4.5 Bal

 

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 Amperage

45

80

110

Maximum Amperage

90

120

150

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/ Electrode

Electrodes per lb (kg) of Weldmetal

Arc Time of Deposition min/lb (kg)

Amperage Settings

Recovery Rate

3/32 (2.5)

14″ (350)

.45 oz (12g)

36 (78)

30 (66)

70

120%

1/8 (3.25)

14″(350)

.93 oz (25g)

17 (38)

20 (44)

100

120%

5/32 (4.0)

14″ (350)

1.2 oz (34g)

13 (29)

17 (37)

130

120%

 

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 / lb

19

12

9

Electrodes / kg

42

26

20

 

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