Aluminum 5B05-H18
Temper
GB 5B05
H18 = strain hardened, full hard
Choose the full-hard cold-drawn state for rivet wire and fastener blanks requiring high shear strength (320 MPa yield); elongation falls to 5 %, so forming is largely ruled out.
Values for the H18 condition
Other 5B05 tempers and conditions
5B05 is listed in 6 conditions; see the grade overview at 5B05.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-welded deposit | Use these all-weld-metal deposit values when the Al-Mg5 filler wire joins 5000 series and some 6000-series base metals by TIG/MIG: 130 MPa yield, 275 MPa tensile, 17 % elongation, no post-weld treatment. | 130 | 275 | 17 | 62 HB | 29 % IACS |
ODefault Annealed | Use the annealed (M) supply state for welding wire, rivet blanks and parts that must be deep drawn or bent; 145 MPa yield with 20% elongation and formability 70. | 145 | 275 | 20 | 65 HB | 29 % IACS |
Strain hardened from hot working only | Choose this as-fabricated hot-worked state of hot-rolled plate and extruded bar for welded structural blanks; strength sits slightly above annealed at 155 MPa yield with 16 % elongation. | 155 | 285 | 16 | 70 HB | 29 % IACS |
Strain hardened and stabilized, quarter hard | Pick strain-hardened quarter-hard, stabilized sheet and strip when 210 MPa yield must coexist with bend formability; the stabilizing step prevents Mg precipitation softening. | 210 | 305 | 12 | 80 HB | 29 % IACS |
Strain hardened, half hard | Use half-hard cold-drawn wire or strip for rivets and profiles that need 250 MPa yield plus some re-bending capacity; elongation drops to 8 % and formability is limited. | 250 | 330 | 8 | 88 HB | 28.5 % IACS |
H18This page Strain hardened, full hard | Choose the full-hard cold-drawn state for rivet wire and fastener blanks requiring high shear strength (320 MPa yield); elongation falls to 5 %, so forming is largely ruled out. | 320 | 385 | 5 | 105 HB | 28 % IACS |
What is 5B05-H18?
5B05-H18 is 5B05 in the H18 temper — choose the full-hard cold-drawn state for rivet wire and fastener blanks requiring high shear strength (320 MPa yield); elongation falls to 5 %, so forming is largely ruled out. 5B05-H18 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 385 MPa (55.8 ksi) — stronger than 80% of aluminum grades. Elongation at break is 5% and the elastic modulus is 70 GPa (10.2 Msi). 5B05-H18 has a density of 2.64 g/cm³ (0.0954 lb/in³), lighter than 94% of aluminum grades. It melts at 568°C (1,054 °F). O is the default condition FabDigit quotes; H18 is available on request or by drawing note.
Advantages
- High strength — 320 MPa (46.4 ksi), better than 80% of aluminum grades
Limitations
- Limited service temperature — 65°C (149 °F), worse than 97% of aluminum grades
- Poor heat conductor — 117 W/m·K (67.6 BTU/hr·ft·°F), worse than 83% of aluminum grades
- Low electrical conductivity — 28 % IACS, worse than 82% of aluminum grades
5B05-H18 properties
Typical room-temperature values for 5B05-H18; 22 are specific to this condition. Other listed values are 5B05 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5B05-H18 has a density of 2.64 g/cm³ (0.0954 lb/in³), lighter than 94% of aluminum grades. It melts at 568°C (1,054 °F).
Mechanical11
5B05-H18 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 385 MPa (55.8 ksi) — stronger than 80% of aluminum grades. Elongation at break is 5% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
5B05-H18 is rated for continuous service to 65°C (149 °F). It conducts heat at 117 W/m·K (67.6 BTU/hr·ft·°F), worse than 83% of aluminum grades. Thermal expansion is 24.1 µm/m·K (13.4 µin/in·°F).
Electrical3
5B05-H18 conducts electricity at 28 % IACS, worse than 82% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), better than 62% of aluminum grades.
Sustainability4
Producing a kilogram of 5B05-H18 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 30%.
Manufacturability7
5B05-H18's machinability is fair (52/100, worse than 63% of aluminum grades); weldability very good (80/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5B05-H18
Is 5B05 easy to machine?
Annealed material smears and builds up on the cutting edge; use sharp high-rake tooling, high spindle speed and emulsion or alcohol-based lubricant. Cold-worked tempers break chips much better.
Can 5B05 be welded?
TIG and MIG weldability is excellent using matching 5B05 or ER5356 wire; remove the oxide film, oil and moisture completely before welding to prevent porosity. Not suitable for furnace brazing.
Can 5B05 be formed, bent or molded?
Cold forming and cold heading are good in the annealed state, but work hardening is rapid; multi-stage deep draws need intermediate annealing at about 340-400 °C. Avoid long holds above 65 °C to prevent sensitisation.
What surface finishes work on 5B05?
Anodizes well, especially after bright or chemical polishing, and also accepts chemical conversion coating and paint. Zincate pretreatment is required before electroplating.
5B05 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 |
|---|---|---|
| Mg | 4.7 – 5.7 | 5.2 |
| Mn | 0.2 – 0.6 | 0.4 |
| Siimpurity limit | ≤ 0.4 | — |
| Feimpurity limit | ≤ 0.4 | — |
| Cuimpurity limit | ≤ 0.2 | — |
| Znimpurity limit | ≤ 0.2 | — |
| Tigrain refiner / impurity limit | ≤ 0.15 | — |
| Betrace Be for oxidation resistance in some casting specs; optional | ≤ 0.01 | — |
| Others (each)each other element | ≤ 0.05 | — |
| Others (total)total other elements | ≤ 0.15 | — |
| Al | balance | — |
5B05-H18 — frequently asked
What is 5B05-H18 used for?
5B05-H18 is typically used for welding wire, cladding layers and welded aluminum structures. In short: al-Mg welding wire grade; cladding and filler stock; 5A05-class strength.
What is the yield strength of 5B05-H18?
5B05-H18 has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 385 MPa (55.8 ksi) — stronger than 80% of aluminum grades. Strength varies by condition: see the 6 listed tempers.
Is 5B05-H18 easy to machine?
Reasonably — machinability is rated fair (52/100, worse than 63% of aluminum grades). Annealed material smears and builds up on the cutting edge; use sharp high-rake tooling, high spindle speed and emulsion or alcohol-based lubricant. Cold-worked tempers break chips much better.
Can 5B05-H18 be welded?
Yes — weldability is rated very good (80/100). TIG and MIG weldability is excellent using matching 5B05 or ER5356 wire; remove the oxide film, oil and moisture completely before welding to prevent porosity. Not suitable for furnace brazing.
What surface finishes work on 5B05-H18?
Anodizes well, especially after bright or chemical polishing, and also accepts chemical conversion coating and paint. Zincate pretreatment is required before electroplating.
Can 5B05-H18 be formed, bent or molded?
Cold forming and cold heading are good in the annealed state, but work hardening is rapid; multi-stage deep draws need intermediate annealing at about 340-400 °C. Avoid long holds above 65 °C to prevent sensitisation.
What is the maximum service temperature of 5B05-H18?
5B05-H18 is rated for continuous use to about 65°C (149 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 5B05-O and 5B05-H18?
O is the default condition — use the annealed (M) supply state for welding wire, rivet blanks and parts that must be deep drawn or bent; 145 MPa yield with 20% elongation and formability 70. H18: choose the full-hard cold-drawn state for rivet wire and fastener blanks requiring high shear strength (320 MPa yield); elongation falls to 5 %, so forming is largely ruled out. Yield strength is 145 MPa in O versus 320 MPa in H18.
Sources
- ASM Handbook Vol.2: Properties and Selection — Nonferrous Alloys (5056/5356 data) — ASM International (1990)
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.