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Standard

Zinc Phosphate Treatment Paint Base

2019-05-17
CURRENT
AMS2480J
This specification covers the requirements for producing a zinc phosphate coating on ferrous alloys and the properties of the coating.
Standard

Zinc Die Casting Alloys

2017-12-20
CURRENT
J469_201712
Because of the drastic chilling involved in die casting and the fact that the solid solubilities of both aluminum and copper in zinc change with temperature, these alloys are subject to some aging changes, one of which is a dimensional change. Both of the alloys undergo a slight shrinkage after casting, which at room temperature is about two-thirds complete in five weeks. It is possible to accelerate this shrinkage by a stabilizing anneal, after which no further changes occur. The recommended stabilizing anneal is 3 to 6 h at 100 °C (212 °F), or 5 to 10 h at 85 °C (185 °F), or 10 to 20 h at 70 °C (158 °F). The time in each case is measured from the time at which the castings reach the annealing temperature. The parts may be air cooled after annealing. Such a treatment will cause a shrinkage (0.0004 in per in) of about two-thirds of the total, and the remaining shrinkage will occur at room temperature during the subsequent few weeks.
Standard

ZINC DIE CASTING ALLOYS

1989-01-01
HISTORICAL
J469_198901
Because of the drastic chilling involved in die casting and the fact that the solid solubilities of both aluminum and copper in zinc change with temperature, these alloys are subject to some aging changes, one of which is a dimensional change. Both of the alloys undergo a slight shrinkage after casting, which at room temperature is about two-thirds complete in five weeks. It is possible to accelerate this shrinkage by a stabilizing anneal, after which no further changes occur. The recommended stabilizing anneal is 3 to 6 h at 100 °C (212 °F), or 5 to 10 h at 85 °C (185 °F), or 10 to 20 h at 70 °C (158 °F). The time in each case is measured from the time at which the castings reach the annealing temperature. The parts may be air cooled after annealing. Such a treatment will cause a shrinkage (0.0004 in per in) of about two-thirds of the total, and the remaining shrinkage will occur at room temperature during the subsequent few weeks.
Standard

Yarn, Organic Fiber (Para-Aramid), High Modulus, 380 Denier,(420 d tex), 0.6% Finish

1991-10-01
HISTORICAL
AMS3901/2A
This specification covers one type of organic fiber in the form of yarn. The product shall be formed as a multiplicity of filaments drawn together and gathered into an approximately parallel arrangement. Organic 380 denier (420 d tex) yarn with 390 ksi (2689 MPa) or 22.0 g/d minimum tensile strength and 17.5 Msi (121 GPa) or 850 g/d minimum tensile modulus for use in general purpose composites requiring high tensile strength and high modulus of elasticity in tension.
Standard

Yarn, Organic Fiber (Para-Aramid), High Modulus, 2160 Denier, (2400 d tex), 0.6% Finish

1992-10-01
HISTORICAL
AMS3901/7A
This specification covers one type of organic fiber in the form of yarn. The product shall be formed as a multiplicity of filaments drawn together and gathered into an approximately parallel arrangement. Organic 2160 denier (2400 d tex) yarn with 390 ksi (2689 MPa) or 19.0 g/d minimum tensile strength and 16.5 Msi (114 GPa) or 750 g/d minimum tensile modulus for use in filament winding requiring high tensile strength and high modulus of elasticity in tension.
Standard

Yarn, Organic Fiber (Para-Aramid), High Modulus, 195 (215 d tex) Denier, 0.6% Finish

1991-10-01
HISTORICAL
AMS3901/1A
This specification covers one type of organic fiber in the form of yarn. The product shall be formed as a multiplicity of filaments drawn together and gathered into an approximately parallel arrangement. Organic 195 denier (215 d tex) yarn with 390 ksi (2689 MPa) or 19.0 g/d minimum tensile strength and 18 Msi (124 GPa) or 850 g/d minimum tensile modulus for use in general purpose composites requiring high tensile strength and high modulus of elasticity in tension.
Standard

Yarn, Organic Fiber (Para-Aramid), High Modulus, 1140 Denier, (1270d tex), 0.6% Finish

1991-10-01
HISTORICAL
AMS3901/3A
This specification covers one type of organic fiber in the form of yarn. The product shall be formed as a multiplicity of filaments drawn together and gathered into an approximately parallel arrangement. Organic 1140 denier (1270 d tex) yarn with 390 ksi (2689 MPa) or 22.0 g/d minimum tensile strength and 16.5 Msi (114 GPa) or 820 g/d minimum tensile modulus for use in general purpose composites requiring high tensile strength and high modulus of elasticity in tension.
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