Aluminum 6B02
GB 6B02
6B02 (LD2-1) is a heat-treatable Al-Mg-Si extrusion alloy in the GB grade system, a composition-adjusted member of the LD2 family with improved extrudability.
Reference datasheet — 6B02 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the T6 condition
6B02 tempers and conditions
6B02 is supplied in 9 conditions, soft to hard. T6 is the default FabDigit quotes; the values on this page are for it.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition for deep drawing, severe bending or re-forming before heat treatment. | 55 | 115 | 26 | 30 HB | 50 % IACS |
As fabricated | No property control; used for stock destined for further heat treatment or non-structural profiles. | 90 | 160 | 18 | 50 HB | 50 % IACS |
Strain hardened from hot working only | Hot-worked plate/extrusions sold with guaranteed minimum strength but no solution treatment. | 95 | 165 | 16 | 52 HB | 49 % IACS |
Solution heat treated and naturally aged | Choose when parts must be bent, drawn or roll-formed after heat treatment, then optionally aged to T6. | 115 | 205 | 20 | 62 HB | 40 % IACS |
Solution treated, stress relieved by stretching, no further… | Extruded profiles needing low residual stress before forming and final ageing. | 115 | 205 | 19 | 62 HB | 40 % IACS |
Cooled from hot working and artificially aged | Standard economical temper for architectural profiles: press-quenched and aged, moderate strength with excellent surface. | 190 | 230 | 10 | 78 HB | 46 % IACS |
T6Default Solution heat treated and artificially aged | Default stocked condition: peak strength with good corrosion resistance for structural profiles and machined parts. | 235 | 270 | 12 | 95 HB | 43 % IACS |
T6, stress relieved by stretching | Plate temper for parts machined from thick stock where distortion from residual stress must be minimal. | 240 | 270 | 11 | 95 HB | 43 % IACS |
Solution treated, stretched, aged, no further straightening | Straight, low-stress extruded bar/profile for precision machining at full T6 strength. | 240 | 270 | 11 | 95 HB | 43 % IACS |
What is 6B02?
6B02 (LD2-1) is a heat-treatable Al-Mg-Si extrusion alloy in the GB grade system, a composition-adjusted member of the LD2 family with improved extrudability. It is used for general-purpose and architectural profiles, giving 235 MPa yield, 270 MPa tensile, 12% elongation and 95 HB in T6 plus 170 W/m·K and 43% IACS; O, F, H112, T4, T4510, T5, T6, T651 and T6510 are on file. Formability in T6 is limited and welding drops the heat-affected zone to roughly T4 strength, with service capped near 150 °C. 6061 and 6063 cover the same applications where those grades are easier to source. 6B02 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 585°C (1,085 °F). 6B02 has a yield strength of 235 MPa (34.1 ksi) and a tensile strength of 270 MPa (39.2 ksi) — stronger than 61% of aluminum grades. Elongation at break is 12% and the elastic modulus is 69 GPa (10 Msi).
What is 6B02 used for?
- extruded profiles
- architectural sections
- general fabrication
Advantages
- Polishes to a fine finish — 70/100, better than 87% of aluminum grades
- High electrical conductivity — 43 % IACS, better than 83% of aluminum grades
- Conducts heat well — 170 W/m·K (98.2 BTU/hr·ft·°F), better than 82% of aluminum grades
- Good corrosion resistance — 68/100, better than 75% of aluminum grades
6B02 properties
Typical room-temperature values for 6B02-T6; bars are the position among aluminum grades.
Physical3
6B02 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 585°C (1,085 °F).
Mechanical15
6B02 has a yield strength of 235 MPa (34.1 ksi) and a tensile strength of 270 MPa (39.2 ksi) — stronger than 61% of aluminum grades. Elongation at break is 12% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
6B02 is rated for continuous service to 150°C (302 °F). It conducts heat at 170 W/m·K (98.2 BTU/hr·ft·°F), better than 82% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
6B02 conducts electricity at 43 % IACS, better than 83% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), better than 75% of aluminum grades.
Sustainability4
Producing a kilogram of 6B02 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 30%.
Manufacturability8
6B02's machinability is good (58/100, worse than 54% of aluminum grades); weldability very good (75/100); formability fair (40/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. 6B02 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 6B02
Is 6B02 easy to machine?
Machines cleanly in T5/T6 with polished-flute carbide tooling and high speeds; gummy and prone to built-up edge in O/T4 — use flood coolant or MQL.
Can 6B02 be welded?
Readily MIG/TIG welded with ER4043 (crack-resistant) or ER5356 (stronger/anodizable); HAZ drops to about T4 strength unless re-solutionized and re-aged.
Can 6B02 be formed, bent or molded?
Excellent hot extrudability at 460–520 °C; bend and draw in O or T4 (min bend radius ≈1–2 t), avoid tight bends in T6 where radius should be ≥3 t.
6B02 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 |
|---|---|---|
| Si | 0.7 – 1.1 | 0.9 |
| Mg | 0.4 – 0.8 | 0.6 |
| Mngrain-structure control | 0.1 – 0.3 | 0.2 |
| Cukept low vs 6A02/LD2 for corrosion resistance | ≤ 0.2 | 0.08 |
| Feimpurity | ≤ 0.45 | 0.25 |
| Cr | ≤ 0.1 | |
| Znimpurity | ≤ 0.15 | |
| Tigrain refiner | ≤ 0.15 | 0.02 |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 6B02?
Excellent clear, coloured and hard anodizing plus powder coating; use chromate-free conversion coating for paint adhesion, and avoid direct contact with steel/copper fasteners.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 6B02 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- LD2-1
How much does 6B02 cost?
6B02 is a standard-cost aluminum ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
6B02 — frequently asked
What is 6B02 used for?
6B02 is typically used for extruded profiles, architectural sections and general fabrication. In short: extrusion-optimised LD2 variant; architectural profile grade; stress-relieved tempers available.
What is the yield strength of 6B02?
6B02 has a typical yield strength of 235 MPa (34.1 ksi) and a tensile strength of 270 MPa (39.2 ksi) — stronger than 61% of aluminum grades. Strength varies by condition: see the 9 listed tempers.
Is 6B02 easy to machine?
Reasonably — machinability is rated good (58/100, worse than 54% of aluminum grades). Machines cleanly in T5/T6 with polished-flute carbide tooling and high speeds; gummy and prone to built-up edge in O/T4 — use flood coolant or MQL.
Can 6B02 be welded?
Yes — weldability is rated very good (75/100). Readily MIG/TIG welded with ER4043 (crack-resistant) or ER5356 (stronger/anodizable); HAZ drops to about T4 strength unless re-solutionized and re-aged.
What surface finishes work on 6B02?
Excellent clear, coloured and hard anodizing plus powder coating; use chromate-free conversion coating for paint adhesion, and avoid direct contact with steel/copper fasteners.
Can 6B02 be formed, bent or molded?
Excellent hot extrudability at 460–520 °C; bend and draw in O or T4 (min bend radius ≈1–2 t), avoid tight bends in T6 where radius should be ≥3 t.
What is the maximum service temperature of 6B02?
6B02 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 6B02-T6 and 6B02-O?
T6 is the default condition — default stocked condition: peak strength with good corrosion resistance for structural profiles and machined parts. O: softest condition for deep drawing, severe bending or re-forming before heat treatment. Yield strength is 235 MPa in T6 versus 55 MPa in O.
How much does 6B02 cost?
6B02 is a standard-cost aluminum ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASM Handbook Vol.2: Properties and Selection — Nonferrous Alloys — ASM International (1990)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.