Common metal stamping materials-stainless steel, aluminum alloy, carbon tool steel, titanium alloy

1. SUS304 (stainless steel):

The most widely used machining stainless steel, because it contains Ni, is richer in corrosion resistance and heat resistance than Cr steel, and has low temperature strength, so it has very good mechanical properties, very high work hardening, non-hardening during heat treatment, non-magnetic, and good strength. Less elastic, usually between 0.4T and 1.0T. Therefore, notebooks are currently widely used in Brackets that require structural strength. The number of stages must be specified in order to meet the design requirements. Generally, it is best to use 3 / 4H. If it is necessary to extend the type, if it is used in LCD bracket, Generally it is better to take 1 / 2H. Reference price: 98NT $ / Kg –0.5T, 130NT $ / Kg–0.3T, 195NT $ / Kg–0.2T.

2. SUS301 (stainless steel):

Cr (chromium) composition is lower than SUS304, and the corrosion resistance is poor. However, cold machining can obtain very high tensile strength and hardness. It has a wide range of characteristics and good elasticity, so it is currently widely used in notebooks to prevent EMI. , As the elastic contact part, but the commonly used thickness is between 0.4T ~ 0.07T. It is necessary to specify the number of stages in use in order to meet the design requirements (such as elasticity and strength). It must be noted that the 301 material has the directionality of metal crystallinity. The higher the number, the harder and more brittle. Corner and side wall cracks. Reference price: 142NT $ / Kg –0.5T, 183NT $ / Kg–0.3T, 180NT $ / Kg–0.2T. 285NT $ / Kg –0.1T.

Comparison of hardness between SUS 301 and SUS 304

SUS 301 H material

Hardness hardness

SUS 301 H HV 480 ° ± 20 ° SUS 304 H HV 380 ° ± 20 ° SUS 430 HV 200 °

SUS 301 3 / 4H HV 380 ° ± 20 ° SUS 304 3 / 4H HV 300 ° ± 20 °

SUS 301 1 / 2H HV 300 ° ± 20 ° SUS 304 1 / 2H HV 260 ° ± 20 ° SUS 304 HV200 ° ± 20 °

Material performance

SUS 301: suitable for elastic use, high carbon content, high hardness, not easy to fatigue elasticity, poor ductility, not easy to draw.

SUS 304: Not suitable for elastic applications, low carbon content, low hardness (soft).

SUS 430: The material contains more impurities (impurity), resulting in unstable hardness.

Remarks: 1. If the hardness of both sides is close to (SUS 301 3 / 4H and SUS 304 H), although the hardness is the same, it is used on elastic products.

  SUS 304 H is more prone to elastic fatigue.

3.The thickness of the material affects the hardness tolerance (the thicker the greater the tolerance).

4. AL1050 (aluminum alloy):

The material contains pure custom aluminum parts, light material, good heat dissipation, material is not easy to process, relatively low strength, and has excellent

Formability, weldability and corrosion resistance. Therefore, it is often used in notebooks for heat sinks and other places without heavy load.

Reference price: 92 ~ 95NT $ / Kg –0.5T.

Model Si Fe Cu Mn Mg Cr Zn Ti Al

AL1100 (Si + Fe) ≦ 0.95 0.05-0.2 0.05–0.10-99.0min

5 AL5052 (aluminum alloy)

good heat dissipation, hard material, strong strength, good formability, weldability and corrosion resistance, but the material is not easy to process.

At present, it is widely used in notebook computers instead of tinplate. Its light weight and good heat dissipation are better than ordinary aluminum materials. It can be designed and used for shielding plate, I / O bracket, and module drive bracket. Reference price: 96NT / Kg –0.5T.

Model Si Fe Cu Mn Mg Cr Zn Ti Al

A5052 0.25 0.40 0.10 0.10 2.2-2.8 0.15-0.35 0.10-rest

6.Carbon tool steel SK3, SK5, SK7:

It is a high-carbon steel with a carbon content of 0.6% or higher. The quenching hardness is SK3, SK5 is HrC50 ~ 60, and SK7 is HrC5O ~ 55. It has good abrasion resistance. It is a cheaper tool steel. It is used for sliding parts and requires hardness and resistance Wearable guide pins, guide sleeves, ejector pins, return pins, etc. After heat treatment, the strength and rigidity are better than SUS 301 H. Therefore, it is often used in notebooks for structural areas that need to be reinforced (such as brackets) and parts that require high elasticity (such as clips and springs, spring pins). The disadvantage of the zone is that it is easy to turn and warp and hard and brittle after heat treatment. Please pay attention to the application. Reference price: 45NT / Kg –0.5T. Carbon content, tensile strength and rigidity: SK3> SK5> SK7

7. Tic grade / HRB70 / HRC36 Titanium

Reference price: 1600 NT $ / Kg.

(advantage)

Lightweight-specific gravity is only 4.52 (7.93 for stainless steel).

High temperature resistance-melting point is up to 1668 ℃, and heat dissipation is fast.

Corrosion resistance-not subject to acid and alkali corrosion, can be stored permanently.

Tough and wear-resistant-Pure titanium has high surface hardness, strong toughness and is not easy to scratch and wear.

Human Affinity-It is less likely to cause allergies to human skin, and has a mild color and glare-free, antibacterial, shape memory, completely non-magnetic,

Never rust.

(Disadvantage)

High activity-during the second machining, it will not be easy to leave the mold.

Especially when the titanium metal is impure and has impurities, it is more likely to occur.

(Application of Titanium)

Titanium was first used in the aerospace industry. Due to its many characteristics (advantages), titanium can be used in various industries, such as: aviation, marine industry, chemical industry, electronics, electroplating, food industry, medical equipment, artificial teeth , Artificial bones, power plants, seawater desalination systems, sports equipment, bicycle parts, golf heads, glasses, clocks, computers, kitchenware, arts, etc .. Custom Titanium Parts can be seen, even in action Phone cases are also useful. In the notebook field, there are also recent applications designed on the LCD cover and Logic upper as the main structure.

8. Tic grade / HRB70 / HRC36 Titanium

Reference price: 1600 NT $ / Kg.

(advantage)

Lightweight-specific gravity is only 4.52 (7.93 for stainless steel).

High temperature resistance-melting point is up to 1668 ℃, and heat dissipation is fast.

Corrosion resistance-not subject to acid and alkali corrosion, can be stored permanently.

Tough and wear-resistant-Pure titanium has high surface hardness, strong toughness and is not easy to scratch and wear.

Human Affinity-It is less likely to cause allergies to human skin, and has a mild color and glare-free, antibacterial, shape memory, completely non-magnetic,

Never rust.

(Disadvantage)

High activity-during the second machining, it will not be easy to leave the mold.

Especially when the titanium metal is impure and has impurities, it is more likely to occur.

(Application of Titanium)

Titanium Shop was first used in the aerospace industry. Due to its many characteristics (advantages), titanium can be used in various industries, such as: aviation, marine industry, chemical industry, electronics, electroplating, food industry, medical equipment, artificial teeth , Artificial bones, power plants, seawater desalination systems, sports equipment, bicycle parts, golf heads, glasses, clocks, computers, kitchenware, arts, etc .. Titanium products can be seen, even in action Phone cases are also useful. In the notebook field, there are also recent applications designed on the LCD cover and Logic upper as the main structure.