United States · AMS

355

SAE AMS 4280J:2008 — SAE AMS 4280J

Chemical composition

wt% · log scale

min – max range
typical value

Mechanical properties

value range by condition

Physical properties

vs. temperature

Mean thermal expansion 10⁻⁶/K

Chemical composition

Element	min	max	Similar	Remarks
Al			Bal	Bal
Cr		0.25
Cu	1	1.5
Fe		0.6
Mg	0.4	0.6
Mn		0.5
Si	4.5	5.5
Ti		0.25
Total Each		0.05
Total Others		0.15
Zn		0.35

Mechanical properties

Heat treatment / condition	Yield strength	Tensile strength	Elongation	Reduction of area	Impact energy	Hardness
Permanent mould castings, Solution heat treated and artificially overaged +T71	≥138；≥186	≥176；≥234	≥1 Lo= 50.8 mm;			HB 70–95 HB/10/500 od Hardness min.=75-100 HB/10/1000

Physical properties

Temperature

20.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
	21.47

100.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
	22.26

200.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
	23.23

300.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
	24.18

999.0

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
	21.27

Typical physical values

Density	Elastic modulus	Poisson's ratio	Remarks
2.60–2.90	69.00–79.00	0.33	典型性能值: 铝合金。该数值并非来自发行标准，它仅是指标性的，不能用于设计用途。