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Product name：KH-70HS
 
Classification：A5.13 / EFe6
 
 

  1. Weld metal is a hi-speed tool steel structure with Mo, which can be used at service temperature up to 550°C.
  2. It provides excellent arc re-start, slag removal and bead appearance.
  3. It is suitable for repairing lathe cutters and hot punch die.
  4. It can be machined only by grinder, due to its high hardness. Stable hardness and toughness can be obtained after temper treatment.

 

Welding Instruction

(1) Dry the electrodes at 300-350°C for 30-60 minutes before use.

( 2 ) Preheat temperature should be ≥ 300°C and slow cooling after welding is required.

( 3 ) Recommended heat treatment:

Quench…..1200~1250°C oil quenching.

Temper…..540~570°C air cooling.

Typical Chemical Composition of Weld Metal (wt. %)

C

Si

Mn

Cr

Mo

V

W

1.050

1.05

0.21

4.65

9.15

1.82

4.21

Typical Hardness of Weld Metal

        Hardness

Condition

Vicker’s hardness

（HV）

Rockwell’s hardness

（HRC）

Shore’s hardness

（HS）

As-welded

Interpass temp. ≤150°C

743

62

84

Continuous build-up

682

59

80

Heat treatment

1200~1250°C oil quench

783

63

87

540~570°C air cooling

Size and Suggested Operating Range (AC or DC+)

Diameter x Length(mm)

3.2x350

4.0x350

5.0x350

6.0X400

Amp

80~120

120~170

160~210

200~280


No.8, Luke 3rd Rd., Luzhu Dist., Kaohsiung City 821, Taiwan (R.O.C.)      TEL:886-7-6955155      FAX:886-7-6955166

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