Manufactured to match the requirements of the Universal Standard AWS A5.4 E410-16, XUPER 646XHD electrodes provide optimal deposition efficiency and controlled slag release for smooth, defect-free finishes. They are widely used in industries such as power generation, oil and gas, heavy equipment manufacturing, and maintenance welding for components exposed to friction, abrasion, and high thermal loads. Each electrode is designed for versatility, suitable for both AC and DC current operations, ensuring stable performance across varied welding setups.
The special high-density coating on XUPER 646XHD Welding Electrodes enhances arc stability, improves weld penetration, and minimizes spatter — critical features for achieving precise, high-quality welds on stainless and martensitic steels. The weld metal produced has a balanced composition that resists scaling and oxidation while maintaining mechanical integrity under stress. These electrodes also provide excellent re-strike characteristics, making them a top choice for welders who demand reliability and consistency during production and repair work.
When used for overlay and hardfacing, XUPER 646XHD produces a surface layer with outstanding hardness and resistance to metal-to-metal wear. This makes them ideal for rebuilding turbine blades, valve seats, shafts, and similar components subjected to erosive or corrosive environments. The electrodes’ controlled hydrogen content reduces the risk of cracking, ensuring a robust weld even under constrained or high-stress conditions.
Every batch of XUPER 646XHD is manufactured under strict quality assurance procedures at Metals And Welding Specialities, ensuring compliance with international standards and repeatable results in field and shop applications. Their consistent performance, combined with ease of handling and reliable results, positions them as a preferred solution among fabrication experts, maintenance engineers, and industrial welders worldwide.
By combining advanced metallurgy with manufacturing precision, Metals And Welding Specialities ensures that XUPER 646XHD Welding Electrodes deliver superior weld quality, extended service life, and proven dependability. Whether for fabrication, repair, or hardfacing, these electrodes set the standard for strength, stability, and performance across a wide range of critical welding applications.
Specification XUPER 646XHD Welding Electrodes
Parameter
Value / Range
Notes / Conditions
Tensile Strength
88,000 psi
Typical value :contentReference[oaicite:0]{index=0}
Hardness (as deposited)
HRB 95
Typical value :contentReference[oaicite:1]{index=1}
Hardness (work-hardened)
HRC ~30
Upon service / work-hardening :contentReference[oaicite:2]{index=2}
Welding Current / Polarity
AC / DCEP (+)
Use AC or Direct Current Electrode Positive :contentReference[oaicite:3]{index=3}
Amperage — A-Range (thick / heavy build-up)
1/8″ (3.2 mm): 140–180 A
5/32″ (4.0 mm): 180–250 A
For heavy build-up / multi-pass conditions :contentReference[oaicite:4]{index=4}
Amperage — B-Range (moderate sections)
1/8″ (3.2 mm): 90–130 A
5/32″ (4.0 mm): 120–160 A
For moderate section repair / cladding :contentReference[oaicite:5]{index=5}
Hardening / Work-hardening Behavior
Work-hardens in service
Deposit hardens further with impact / service :contentReference[oaicite:6]{index=6}
Operating Characteristics / Features
• High deposition rate
• High impact & crack resistance
• Self-releasing slag
• Machinable with tungsten carbide tools
• Good weldability in dissimilar joints
As provided in manufacturer product description :contentReference[oaicite:7]{index=7}
Typical Applications
Joining and hardfacing of carbon/manganese steels,
overlay / wear protection for components: bucket lips, flanges, jaws, hammers, etc.
From application / datasheet description :contentReference[oaicite:8]{index=8}
Temperature / Welding Guidelines
Do not heat 12 % Mn steel above 400 °F (~204 °C)
Recommended in procedure guidelines :contentReference[oaicite:9]{index=9}
Equivalent Grade Of AWS ENiCrMo-4 Coated Electrodes
Specification / Standard
AWS / ASME
UNS
Alloy Name / Trade Name
European / ISO
DIN / German
Werkstoff No.
Other / National (China)
Equivalent Grade / Name
ENiCrMo-4
W80276
C-276 (Hastelloy C-276)
ENiCr15Mo15W
SG-NiMo16Cr16W
2.4887
NS334 (GB / T 14992-2005)
XUPER 646XHD Welding Electrodes Parameters
Parameter
Value / Range
Current / Polarity
AC / DCEP (+)
Tensile Strength (typical)
88,000 psi (~ 607 MPa)
Hardness (as deposited)
HRB ~ 95
Hardness (after work-hardening)
~ HRC 30
Amperage – A Range (heavy / multipass)
1/8″ (3.2 mm): 140 – 180 A
5/32″ (4.0 mm): 180 – 250 A
Amperage – B Range (moderate)
1/8″ (3.2 mm): 90 – 130 A
5/32″ (4.0 mm): 120 – 160 A
Recommended Weave / Technique
Weaving limited to 1½ × electrode diameter
Maximum Preheat / Heat Limit
Do not heat 12 % Mn steel over 400 °F (204 °C)
Typical Hardness (alternative source)
As deposited: HRB 80–90 | Work hardened: HRC 28–32