Page 977 - MiSUMi FA Mechanical Components Economy Series

3.Aluminum Alloy Materials
Type Material Code Applications Comment JIS Flat Bar Square Bar Hexagonal Bar Round Bar Section Steel
Al−Cu A2011 General-Use Strength Free-Cutting Alloy. It excels in machinability but k
Alloy Materials has worse corrosion resistance.
Al−Cu A2017 General-Use High Strength and Machinability Duralumin k k k
Alloy Strength Materials
Al−M General Machine Most typical aluminum alloy with medium strength.
Alloy A5052 Parts Covers, cases, etc. With high fatigue strength in comparison with its strength and high corrosion resistance to seawater. k k
Al−M A5056 General Machine It has fi ne machined surface and high corrosion resistance to seawater. It JIS H 4000 k
Alloy Parts has fi ne machined surface and high corrosion resistance to seawater.
Al−M −Si A6061 General Machine Heat-treated corrosion resisting alloy. k k
Alloy Parts High durability owing to T6 treatment.
Al−M −Si General Machine Weaker than 6061, but more extrudable. Applicable to complex cross-sections shapes. k k k
Alloy A6063 Parts and Structural Material Good corrosion resistance and surface treatment.
Al−Zn−M It is one of the strongest aluminum alloys but has
Alloy A7075 Jigs and Dies worse corrosion resistance. Extra Super Duralumin k
JIS Acronyms for Non-Ferrous Metal
P Plate, Strip, Disk TW Welded Tube
PC Laminate TWA Arc-Welded Tube
BE Extruded Bar S Extruded Section
BD Drawn Bar BR Riveted Bar
W Drawn Wire FD Die-Forged Part
TE Seamless Extruded Tube FH Free-Forged Part
TD Seamless Drawn Tube
Quality Codes for Aluminum and Aluminum Alloys
Code Defi nition Description
Completed as a product, without any order for thermal refi ning. Extruded or forged material,
F Plain Manufactured Material
not thermally refi ned.
H112 Wrought material, for which certain mechanical properties are guaranteed without the need of hardening.
O Brought into the softest state by Completely re-crystallized by annealing. A thermally treated alloy should be cooled at a temperature
annealing.
below the annealing temperature to prevent the eff ect of annealing completely.
H1n Hardened by cold working. n is a numeral from 1 to 9, representing the degree of hardening. "8" represents hard material,
and "4"represents the state halfway 1/2 between 0 and hard material. "2" represents the level
H H2n Hardened and then properly softened by heat.
halfway between 0 and 1/2 hardness, and "6" the state halfway between 1/2 hardness and hard
H3n Stabilized after cold working. material.
Cooled after high-temperature working Quenched at the end of a cold working process and allowed to age and harden at ambient temperature. Extruded material
T1 is typical material processed in this way. Cold working such as correction may be conducted unless it aff ects the strength.
and then allowed to age naturally. Used for an alloy such as 6063, for which the eff ect of quenching can be realized by cooling after hot working (extrusion).
Allowed to age naturally after solution Cold working is conducted for plates, rods, tubes, etc. to enhance the strength in some
T3 cases, and to improve the corrective dimension precision in other cases, with an obvious
treatment and cold working. eff ect. T361 when cold working is performed to a higher degree than that for T3.
Allowed to age naturally after Cold working is conducted to enhance the strength after solution treatment, and then it is tension processed
T351 solution to give 1.5% to 3% permanent distortion to remove residual tension, and allowed to age naturally.
treatment and cold working.
however, aging is a longer process. The tensile property upon the elapse of one month is adopted as
T4 Natural aging after solution Aging is usually completed after exposure to ambient temperature for approx. 4 days. In the case of 7NO1,
treatment referential data. The variety that is given T4 treatment by a user under specifi ed conditions is called T42.
Hardened through artifi cial aging after Hardened through artifi cial aging to improve the mechanical properties and stabilize the dimensions. Used for an
T5
high-temperature processing and quenching alloy or casting such as 6063, for which the eff ect of quenching can be realized by cooling after hot working (extrusion).
Hardened through artifi cial aging Excellent strength can be attained for a thermally treated alloy without cold working in the typical heat
T6
after solution treatment. treatment process. An item that is given T6 treatment by a user under specifi ed conditions is called T62.
T Wrought Materials: Quenched with lukewarm water to prevent distortion due to the main hardening.
Hardened through artifi cial aging
T61 after solution treatment by The conditions for hardening through artificial aging are adjusted to attain strength
quenching with lukewarm water. exceeding that accomplished by regular T6 treatment.
Casting:Tempered after hardening
Overaging surpassing those needed for hardening through artifi cial aging is carried out to attain the
T7 Stabilized after solution treatment
maximum strength, because special properties are adjusted somewhat at the expense of strength.
Overaging after solution Overaging after solution treatment to rectify the tendency to crack due to corrosion under stress.
T73
treatment. Specifi ed in 7075, forgings, of JIS.
Overaging after removal of Overaging after removal of residual stress by compression to retain 1% to 5% permanent deformation
T7352 residual subsequent to solution treatment, in order to rectify the tendency to crack due to corrosion under stress.
stress after solution treatment. Included in free-forged part, 7075.
Hardened through artifi cial aging Cold working performed, with a noticeable eff ect, to improve the mechanical properties or to rectify drawbacks
T8 after cold working subsequent or improve dimension precision. Called T83 when the sectional area is reduced 3%through cold working.
to solution treatment. Called T86 when the reduction rate is 6%. These procedures are performed to enhance the strength.
Cold working after hardening through
T9 artifi cial aging subsequent to Cold working is necessary to enhance the strength.
solution treatment.
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