Hard Facing

JACKSUN ARMOUR MN

AWS: E7-UM-250KP

JACKSUN ARMOUR MN is a high-manganese hard-facing electrode designed for extreme impact and moderate abrasion conditions.
The E7-UM-250KP series provides excellent resistance to shock, impact, and spalling, suitable for wear-prone industrial components in mining, crushing, and heavy-duty machinery.

1. Typical Chemical Composition of Weld Metal (% by weight)

C	Mn	Si	Cr
0.35-1.0	12 – 16	0.3-0.8	5.0-18.0

2. Typical Mechanical Properties of Weld Metal

Property	Hardness (HB)	Impact Toughness (J)
Typical Values	250 – 300	Excellent for shock & impact applications

3. Dimension, Current Condition & Packing Data (SMAW Welding)

Size (mm)	Size (inch)	Current Range (A)	Polarity	Voltage (V)	Packing (5 kg)	Packing (20 kg)
3.2	1/8	90 – 130	DC+	22 – 24	✔	✔
4.0	5/32	120 – 170	DC+	24 – 26	✔	✔
5.0	3/16	150 – 220	DC+	26 – 28	✔	✔

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