Kobelco MF-38 / US-49 Flux and wire combination

Name: Flux and wire combination
Brand: Kobelco

Kobelco · Model MF-38 / US-49

MF-38 / US-49

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Kobelco Flux and wire combination

MF-38 / US-49 Flux and wire combination. Applied for ASTM A204 Gr. A, B, C and equivalents

Official model: MF-38 / US-49

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Individual manufacturer designation and recorded specifications sourced from the official OEM website on 10 October 2026. Supply terms, regional configuration and application suitability are confirmed by quotation. The source does not publish a separate article SKU for this record. OEM photograph unavailable; the image is explicitly labelled model-reference artwork.

Technical information

Features	Applied for ASTM A204 Gr. A, B, C and equivalents
Classification	AWS A5.23 F8P2-EG-A4, F8A4-EG-A4
Type of flux	Fused
Redrying of flux	150-350°Cx1h
Polarity	AC
Packaging data	Flux \| \| Can \| Wire \| φ mm \| Spool \| Coil; MF-38 \| 12x65 \| 25kg \| US-49 \| 1.6 \| - \| 20kg \| - \| - \| -; \| 20x200 \| 25kg \| \| 2.0 \| 10kg \| - \| - \| - \| -; \| 20xD \| 25kg \| \| 2.4 \| 10kg \| - \| 25kg \| - \| -; \| \| \| \| 3.2 \| - \| - \| 25kg \| 76kg \| -; \| \| \| \| 4.0 \| - \| - \| 25kg \| 75kg \| -; \| \| \| \| 4.8 \| - \| - \| 25kg \| 75kg \| 150kg; \| \| \| \| 6.4 \| - \| - \| 25kg \| - \| 159kg; Volume mm \| 240W, 350H, 240L \| Volume mm \| 240W, 110H, 230L \| 280W, 110H, 270L \| 430W, 90H, 430L \| 740W, 110H, 740L \| 840W, 110H, 840L
Composition (wire mass%)	\| Typical \| Guaranty a; C \| 0.10 \| 0.07-0.12; Si \| 0.02 \| 0.05; Mn \| 1.58 \| 1.25-1.80; P \| 0.009 \| 0.025; S \| 0.011 \| 0.025; Mo \| 0.53 \| 0.45-0.60; Cu \| 0.11 \| 0.35; Note: a Single values are maximium.
Composition (weld metal mass %)	\| Typical \| Guaranty a; C \| 0.10 \| 0.15; Si \| 0.37 \| 0.80; Mn \| 1.35 \| 1.60; P \| 0.014 \| 0.030; S \| 0.014 \| 0.030; Mo \| 0.53 \| 0.40-0.65; Cu \| 0.09 \| 0.35; Note: a Single values are maximium.
Weld mechanical properties	\| Typical \| Guaranty; 0.2%YS (MPa) \| 510 \| 469min.; TS (MPa) \| 590 \| 552-689; EI on 4d (%) \| 30 \| 20min.; IV -51°C (J) \| 50 \| 27min.; PWHT (°Cxh) \| 620x1 \| 620±15x1
Approvals / Click here for certificates	ABS \| 3YM; LR \| 3YM; DNV \| ⅢYM; BV \| A3YM; NK \| KAW3Y46M H10; CCS \| 3YM; Note: Single electrode