EMI/RFI Shielding Magnesium Alloy Plate AZ31B-H24 as per AMS 4377G standard Thick Thickness for Head Expander

EMI/RFI Shielding Magnesium Alloy Plate AZ31B-H24 as per AMS 4377G standard Thick Thickness for Head Expander

AZ31B is a wrought magnesium base alloy with good room-temperature strength and ductility combined with corrosion resistance and weldability. Increased strength is obtained by strain hardening with a subsequent partial anneal (H24 and H26 tempers). Our sheet and plate’s size range is:

Sheet: thickness from 0.5mm to 6mm; Max. width is 600mm; Max. length is 6000mm;

Plate: thickness from 6 mm to 200mm; Max. width is 2000mm; Max. length is 6000mm;

Block: We can supply precut blocks according to customer’s requirements.

APPLICATIONS

Sheet and plate in AZ31B find application in medium strength service at temperatures below 150°C. Diverse uses including aerospace, aircraft, concrete tools, 3C (cell phone / camera / computer), speaker cones and textile machinery can all benefit from light weight AZ31B.

AZ31B is non-magnetic and has high electrical and thermal conductivity filling the requirements for RFI and EMI shielding in the electronics and computer industries.

Superplastic forming of AZ31B sheet at elevated temperatures allows production of a wide variety of intricate parts for automotive uses. Monocoque construction utilizing formed sheet can be adapted to many commercial applications.

SPECIFICATIONS

ASTM B90/B90M-07

AMS 4375

AMS 4376

AMS 4377

CHEMICAL COMPOSITION

Al: 2.5-3.5%

Zn: 0.7-1.3%

Mn: 0.20 – 1.0%

Mg: Balance

PHYSICAL PROPERTIES

Density: 1.78

Coefficient of thermal expansion: 26.8 x 10^-6K^-1

Specific heat: 1040 Jkg^-1k^-1

Thermal conductivity: 76.9Wm^-1k^-1

Electrical resistivity: 92nΩm

Modulus of elasticity: 45 x 10⁹Pa

Poissons ratio: 0.35

Melting range: 566 - 632°C

HEAT TREATMENT

No thermal treatment is available for increasing the strength of this alloy after fabrication.

MECHANICAL PROPERTIES

The sheet and plate shall conform to the tensile requirements in above Table unless other agreement is made between seller and purchaser. Mechanical Properties for sizes and tempers not shown in above Table shall be as agreed upon by seller and purchaser.

OTHER PROPERTIES

Typical Hadness

O temper: 67 Rockwell E

H24 temper: 83 Rockwell E

WELDABILITY

Excellent weldability with gas shielded arc using AZ61A (preferred) or AZ92A filler rod; post weld stress relief is required to prevent stress corrosion cracking. Resistance welding is excellent.

MACHINING

AZ31B, like all magnesium alloy sheet and plate, machines faster than any other metal. Providing the geometry of the part allows, the limiting factor is the power and speed of the machine rather than the quality of the tool material. The power required per cubic centimeter of metal removed varies from 9 to 14 watts per minute depending on machining operation.

DENT RESISTANCE

Weight for weight, AZ31B-H24 has proven to be superior to competitive materials in its resistance to denting at moderate energy levels.

Dent Resistance of 1mm Gauge Sheet (Dent depth in mm from 25mm spherical redius indentor on 350mm span)

SURFACE TREATMENT

All the normal chromating, anodizing, plating, and finishing treatment are readily applicable. AZ31B also responds well to plasma electrolytic oxidation finishing.

CORROSION RESISTANCE

Continuous exposure for 2.5 years.

Marine Atmosphere

AZ31B-H24 0.008mg.cm^-2d^-1

Mild steel 0.323mg.cm^-2d^-1

Industrial Atmosphere

AZ31B-H24 0.013mg.cm^-2d^-1

Mild steel 0.055mg.cm^-2d^-1

Rural Atmosphere

AZ31B-H24 0.006mg.cm^-2d^-1

Mild steel 0.032mg.cm^-2d^-1

With a density of 1.8gcm³, by volume magnesium is 30% lighter than aluminium and 75% lighter than steel.

High Specific Stiffness

For bars with equivalent weight and width, magnesium is 18 times stiffer than steel and double that of aluminium. In practice it is not always possible to increase section thickness to these extents. But with only small increases in cross section it is not possible to redesign parts that offer 20-25% weight savings over aluminium equivalents and 65-70% weight savings when substituting steel designs.

Versatile

Magnesium alloys can be shaped into plate by rolling and extruded into both solid and hollow profiles. These can be further shaped using forging, pressing, bending or simply machining from solid.

Highly Machinable

Magnesium alloys are the easiest of all structural metals to machine.

Advantages include:

Low power consumption (45% less than aluminium)

Fast machining rate (55%)

Excellent surface finish

Reduced tool wear

Well broken chips

High Strength

Alloys are available that have comparable properties with other structural metals – with the added advantage of superior performance at elevated temperatures (good creep resistance and tensile strength).

EMI/RFI Shielding

Has inherent screening properties, useful for electronic enclosures and has good thermal conductivity for heat dissipation.

Vibration Damping

Magnesium alloys have excellent vibration damping properties.

Corrosion Resistance

Modern alloys have good corrosion resistance. For more severe environments there are a range of surface passivation and top coat treatments commercially available

Our Services:
1. Small order quantity available
2. Professional engineering team and sales team
3. Payment: T/T & Western Union
4. OEM/ODM Supporttable
5. Free samples provided
6. Competitive price and high quality

FAQ:
1. Q: Are you a factory or trading company?
A: We are direct manufacturer located in Xi'an, Shaanxi province, and have our equipment!

2. Q: Are your products customized?
A: Yes,the products in the website are only the common type or the previous types, we can supply the new products according to your requirements or drawings.

3. I do not know how to use your product ?
Do not worry ! We can supply technical guidance together with products.

4. Q: How can I get some samples?
A: Several samples are freely offered for buidling the business long-term relationships and letting our customers believing the quality of our products.