Magnesium Alloy AWS BMg-1-F (As fabricated)
Temper
UNS M19001 · AISI/SAE AWS A5.19 BMg-1
Condition in which the consumable itself is supplied (extruded/drawn rod 1.6–4.8 mm or spooled wire); mechanical values apply to the stock, not to a joint.
Values for the F condition
Other AWS BMg-1 tempers and conditions
AWS BMg-1 is listed in 3 conditions; see the grade overview at AWS BMg-1.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AS-BRAZEDDefault filler deposited in a brazed joint (600–620 °C) | Default condition: properties of the solidified BMg-1 fillet/joint after torch, furnace or dip brazing of AZ31B/AZ61A/M1A/AZ92A parts. | 95 | 165 | 3 | 63 HB | 10.5 % IACS |
GTAW/GMAW deposit using BMg-1 rod or wire | Pick when the rod is used as an arc-welding filler for repairing cast or wrought magnesium; deposit is stronger and slightly more ductile than the brazed fillet. | 110 | 200 | 4 | 65 HB | 10 % IACS |
FThis page As fabricated | Condition in which the consumable itself is supplied (extruded/drawn rod 1.6–4.8 mm or spooled wire); mechanical values apply to the stock, not to a joint. | 140 | 230 | 6 | 68 HB | 11 % IACS |
What is AWS BMg-1-F?
AWS BMg-1-F is AWS BMg-1 in the F temper — condition in which the consumable itself is supplied (extruded/drawn rod 1.6–4.8 mm or spooled wire); mechanical values apply to the stock, not to a joint. AWS BMg-1-F has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 230 MPa (33.4 ksi) — weaker than 61% of magnesium alloy grades. Elongation at break is 6% and the elastic modulus is 45 GPa (6.53 Msi). AWS BMg-1-F has a density of 1.82 g/cm³ (0.0658 lb/in³), heavier than 74% of magnesium alloy grades. It melts at 443°C (829 °F). AS-BRAZED is the default condition FabDigit quotes; F is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 16 MPa·√m (14.6 ksi·√in), better than 87% of magnesium alloy grades
- Forms and bends easily — 35/100, better than 87% of magnesium alloy grades
Limitations
- Hard to polish — 40/100, worse than 100% of magnesium alloy grades
- Low electrical conductivity — 11 % IACS, worse than 96% of magnesium alloy grades
- Limited service temperature — 120°C (248 °F), worse than 78% of magnesium alloy grades
AWS BMg-1-F properties
Typical room-temperature values for AWS BMg-1-F; 22 are specific to this condition. Other listed values are AWS BMg-1 reference data and may not represent this condition. Bars are the position among magnesium alloy grades.
Physical3
AWS BMg-1-F has a density of 1.82 g/cm³ (0.0658 lb/in³), heavier than 74% of magnesium alloy grades. It melts at 443°C (829 °F).
Mechanical14
AWS BMg-1-F has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 230 MPa (33.4 ksi) — weaker than 61% of magnesium alloy grades. Elongation at break is 6% and the elastic modulus is 45 GPa (6.53 Msi).
Thermal6
AWS BMg-1-F is rated for continuous service to 120°C (248 °F). It conducts heat at 79 W/m·K (45.6 BTU/hr·ft·°F), worse than 57% of magnesium alloy grades. Thermal expansion is 26 µm/m·K (14.4 µin/in·°F).
Electrical3
AWS BMg-1-F conducts electricity at 11 % IACS, worse than 96% of magnesium alloy grades.
Chemical & Environmental3
Corrosion resistance is not recommended (14/100), worse than 94% of magnesium alloy grades.
Sustainability4
Producing a kilogram of AWS BMg-1-F takes about 320 MJ of energy and emits 30 kg of CO₂ — less than 74% of magnesium alloy grades. Typical recycled content is 10%.
Manufacturability8
AWS BMg-1-F's machinability is excellent (92/100, worse than 86% of magnesium alloy grades); weldability very good (70/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with AWS BMg-1-F
Is AWS BMg-1 easy to machine?
Cuts extremely freely with sharp, high-rake tools and no coolant misting; keep chips dry and away from water — magnesium fines are a fire hazard.
Can AWS BMg-1 be welded?
Use as GTAW/GMAW filler on AZ31B/AZ61A/AZ92A with pure Ar or Ar-He shielding, tight fit-up and low heat input to avoid hot cracking; braze at 600–620 °C where the base-metal solidus allows only ~20–30 °C of margin.
Can AWS BMg-1 be formed, bent or molded?
Supplied straightened or spooled; bend or coil warm (150–250 °C) since cold formability of Mg-9Al-2Zn is limited.
What surface finishes work on AWS BMg-1?
Remove all chloride/fluoride flux by hot-water and dilute chromic/nitric acid rinsing, then apply a conversion coating (ASTM D1732) plus epoxy primer; leaving flux residue guarantees rapid joint corrosion.
AWS BMg-1 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Alprincipal melting-point depressant | 8.3 – 9.7 | 9 |
| Zn | 1.7 – 2.3 | 2 |
| Mncorrosion control | 0.15 – 1 | 0.25 |
| Beoxidation inhibitor; observe fume-toxicity precautions | 2×10⁻⁴ – 8×10⁻⁴ | 5×10⁻⁴ |
| Si | ≤ 0.05 | — |
| Cu | ≤ 0.05 | — |
| Ni | ≤ 0.01 | — |
| Fe | ≤ 0.01 | — |
| Other, totalresiduals, each ≤0.05 typical | ≤ 0.3 | — |
| Mg | balance | — |
AWS BMg-1-F — frequently asked
What is AWS BMg-1-F used for?
AWS BMg-1-F is typically used for GTAW and GMAW filler for magnesium structures, repair welding of magnesium castings, welding AZ31B sheet and extrusion fabrications, torch and furnace brazing of magnesium assemblies, build-up of worn or mis-machined Mg castings and weld repair of magnesium tooling and fixtures. In short: AZ61A-composition magnesium filler; welds and brazes magnesium; consumable, not structural stock.
What is the yield strength of AWS BMg-1-F?
AWS BMg-1-F has a typical yield strength of 140 MPa (20.3 ksi) and a tensile strength of 230 MPa (33.4 ksi) — weaker than 61% of magnesium alloy grades. Strength varies by condition: see the 3 listed tempers.
Is AWS BMg-1-F easy to machine?
Yes — machinability is rated excellent (92/100, worse than 86% of magnesium alloy grades). Cuts extremely freely with sharp, high-rake tools and no coolant misting; keep chips dry and away from water — magnesium fines are a fire hazard.
Can AWS BMg-1-F be welded?
Yes — weldability is rated very good (70/100). Use as GTAW/GMAW filler on AZ31B/AZ61A/AZ92A with pure Ar or Ar-He shielding, tight fit-up and low heat input to avoid hot cracking; braze at 600–620 °C where the base-metal solidus allows only ~20–30 °C of margin.
What surface finishes work on AWS BMg-1-F?
Remove all chloride/fluoride flux by hot-water and dilute chromic/nitric acid rinsing, then apply a conversion coating (ASTM D1732) plus epoxy primer; leaving flux residue guarantees rapid joint corrosion.
Can AWS BMg-1-F be formed, bent or molded?
Supplied straightened or spooled; bend or coil warm (150–250 °C) since cold formability of Mg-9Al-2Zn is limited.
What is the maximum service temperature of AWS BMg-1-F?
AWS BMg-1-F is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between AWS BMg-1 AS-BRAZED and AWS BMg-1-F?
AS-BRAZED is the default condition — default condition: properties of the solidified BMg-1 fillet/joint after torch, furnace or dip brazing of AZ31B/AZ61A/M1A/AZ92A parts. F: condition in which the consumable itself is supplied (extruded/drawn rod 1.6–4.8 mm or spooled wire); mechanical values apply to the stock, not to a joint. Yield strength is 95 MPa in AS-BRAZED versus 140 MPa in F.
Sources
- AWS A5.8/A5.8M — Specification for Filler Metals for Brazing and Braze Welding — American Welding Society (2019)
- AWS A5.19 — Specification for Magnesium Alloy Welding Electrodes and Rods — American Welding Society (1992)
- ASM Handbook, Vol. 6 — Welding, Brazing and Soldering (Brazing of Magnesium Alloys) — ASM International (1993)
- ASM Specialty Handbook: Magnesium and Magnesium Alloys — ASM International (1999)
- ASM Handbook, Vol. 2 — Properties and Selection: Nonferrous Alloys (AZ92A data) — ASM International (1990)
- ASTM D1732 — Preparation of Magnesium Alloy Surfaces for Painting — ASTM International (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.