Common Sheet Metal Materials

Stainless Steel Sheet (SUS)

Stainless steel plate, also known as stainless acid-resistant steel, is a type of steel that is resistant to weak corrosive media such as air, steam, and water, as well as chemically corrosive media such as acid, alkali, and salt.
In practise, steel that is resistant to weak corrosive media is typically referred to as stainless steel, whereas steel that is resistant to chemical media corrosion is referred to as acid-resistant steel. Austenitic stainless steel is a form of stainless steel that is extensively used in sheet metal processing.

Stainless Steel Sheet
Stainless Steel Sheet

Common models: SUS304 (18-8 stainless steel, non-magnetic),  SUS301 (spring stainless steel, slightly magnetic),  SUS430 (magnetic, easy to rust).

Tensile strength: above 53kgf/mm².

Material thickness: 0.1~10.0 mm.

Material properties:

  • Metallic white luster, the surface is not easy to rust, and can be divided according to the surface state: matte surface, bright surface, mirror surface, brushed surface, etc. To protect the surface, a PVC protective film is often attached.
  • Generally, no surface treatment is required. For baking paint, special surface treatment is required.
  • It is not suitable for electroplating, but electrolysis can be used.
  • Suitable for refrigeration, air conditioners, home appliances, and decorative structural parts.

Specific gravity: 7.95

Weight calculation: length (m) × width (m) × thickness (mm) × specific gravity = kilogram (kg)  such as:

  • SUS304  2.0×1220×2440  weight: 2.0×1.22×2.44×7.95 = 44.65kg
  • SUS430 1.0×1000×2000  weight: 1×1×2×7.95 = 15.9kg

Cold Rolled Steel (SPCC、CRS)

Cold-rolled ordinary thin steel plate is the abbreviation of ordinary carbon structural steel cold-rolled plate, referred to as: cold plate. Rolling does not produce scale.
Therefore, it has good surface quality and high dimensional accuracy. Coupled with annealing treatment, its mechanical properties and process properties are good. It is the most commonly used metal material for sheet metal processing.

Cold Rolled Steel
Cold Rolled Steel

Hardness: HRB 1/2H = 74~89 1/4H = 65~80 1/8H=50~71 H = 89 or more

Tensile strength: above 28kgf/mm.

Material thickness: 0.25~3.2mm.

Material properties:

  •  Iron gray luster, the surface is easy to be scratched and rusted, and attention must be paid to protection and quick sequence during processing.
  • It is suitable for electroplating (colorful zinc plating, white zinc plating, nickel plating, tin plating…), baking paint, powder spraying… and other work pieces.

Specific gravity: 7.85.

Weight calculation: length (m) × width (m) × thickness (mm) × specific gravity = kilogram (kg)  such as:

  • The weight of SPCC 2.0×1220×2440 is: 2.0×1.22×2.44×7.85 = 46.74 kg
  • The weight of SPCC 1.0×1000×2000 is: 1×1×2×7.85 = 15.7 kg

Aluminum (AL,A1100P,A5052H32P,AL6061T6)

Aluminum Sheet, Aluminum is a silver-white light metal with good thermal conductivity, electrical conductivity and ductility. Pure aluminum has very low strength and cannot be used as a structural material. Aluminum alloy plates are generally used in sheet metal processing.

According to the content of alloy elements, aluminum plates can be divided into 8 series, 1000 series, 2000 series ~ 8000 series. Commonly used are 2000 series, 3000 series and 5000 series.

  • 2000 series is a kind of copper-aluminum alloy, which is characterized by high hardness, also known as hard aluminum; it can be used as various medium-strength parts and components。
  • 3000 series is a kind of manganese-aluminum alloy with good rust resistance, so it is also called hard aluminum. Anti-rust aluminum;
  • 5000 series is a magnesium-aluminum alloy with low density, high tensile strength and high elongation. The weight of aluminum-magnesium alloy is lower than other series under the same area.
Al5052 Aluminum Sheet
Al5052 Aluminum Sheet

Common models: A1100P-O (O stands for soft material, no hardness), A1050P, A5052H32P, AL6061T6, AL6063T5…

Tensile strength: A5052H32P=25kgf/mm² or more, A1100P, A1200P=7 kgf/mm² or more AL6061T6=27kgf/mm² or more

Material thickness: 0.3~20mm.

Material properties:

  • Metallic white luster, the surface is easy to be oxidized and corroded, so the surface is often affixed with PVC protective film.
  • Surface treatment: it can be sandblasted, brushed, or polished first, and then anodized (non-conductive, can be dyed in various colors); chromate oxidation (also known as conductive oxidation, with primary color and golden yellow).

Specific gravity: 2.75

Weight calculation: length (m) × width (m) × thickness (mm) × specific gravity = kilogram (kg) such as:

  • The weight of AL 2.0×1220×2440 is: 2.0×1.22×2.44×2.75 = 16.37kg
  • The weight of AL 1.0×1000×2000 is: 1×1×2×2.75 = 5.5kg

Note:

  • Pay attention to the protection of aluminum plate processing, do not scratch the surface, and prevent cracks and folding knife marks when bending. (If the material is too hard, it can be annealed first or the lower die groove can be enlarged)

Hot-dip Galvanized Steel (SPGC)

Hot-dip Galvanized Steel
Hot-dip Galvanized Steel

Hardness: HRB 1/2H=74~89 1/4H=65~80 1/8H=50~71 H=89 or more

Tensile strength: above 40~55kgf/mm².

Material thickness: 0.4~3.2mm.

Material properties:

  • Metallic white luster with patterns, the surface is not easy to rust, but white rust spots will occur due to corrosion.
  • generally do not do surface treatment.
  • Can not do electroplating (colorful zinc plating, white zinc plating, nickel plating, tin plating…).
  • It is suitable for refrigeration, air conditioning, heavy motor and roof structural parts.

Specific gravity: 8.25

Weight calculation: length (m) × width (m) × thickness (mm) × specific gravity = kilogram (kg) such as:

The weight of SPGC 2.0×1220×2440 is: 2.0×1.22×2.44×8.25 = 49.1kg

                         SPGC 1.0×1000×2000 weight is: 1×1×2×8.25 = 16.5kg

Note:

  • If you want to bend, pay attention to whether the zinc layer on the surface falls off, and remove the zinc powder of the lower mold in time.

Hot Rolling Steel (SPHC、HRS)

Hardness: HRB 1/2H=74~89 1/4H=65~80 1/8H=50~71 H=89 or more

Tensile strength: above 41~52kgf/mm.

Material thickness: 1.4~6.0mm. Material code above 6mm is SS41

Material properties:

  • Black-gray luster, the surface is not easy to be scratched, but easy to rust, which must be removed during processing.
  • It is not suitable for electroplating (colorful zinc plating, white zinc plating, nickel plating, tin plating…).
  • It is suitable for structural parts such as baking paint and powder spraying.

Specific gravity: 7.85.

Weight calculation: length (m) × width (m) × thickness (mm) × specific gravity = kilogram (kg) such as:

The weight of SPHC 2.0×1220×2440 is: 2.0×1.22×2.44×7.85=46.74kg 

                        SPHC1.0×1000×2000 weight is: 1×1×2×7.85=15.7kg

Note:

  • If electroplating is to be done, sandblasting or wire drawing must first remove the surface carbonized layer.

Copper (C1020, C1100, C2100, 2200, 2300, 2400, C2600)

Common models: C1020P-O (O stands for soft material, no hardness), C1020P-1/2H (Vickers hardness HV75~120) 1/4H HV=60~100 H HV=80 or more

Tensile strength: O material=20kgf/mm² or more, 1/4H material=22~28 kgf/mm² 1/2H material=25~32kgf/mm², H material=28 kgf/mm² or more

Material thickness: more than 0.3mm

Material properties:

  •  #1xxx has a copper content of 99.9%, (also known as electrolytic copper or confluence copper) with excellent electrical and thermal conductivity, good drawing processability, good weldability, corrosion resistance, weather resistance, and metallic red luster. Suitable for electrical and chemical industries.
  • #2xxx contains 60 to 96% copper, (also known as brass or confluence copper) ductility, processability, and electroplating properties are commonly used in wiring equipment, instrument panels, bullet casings, etc.
  • Surface treatment: it can be drawn first, or polished and then pickled, copper-plated, tin-plated, and nickel-plated.

Specific gravity: 8.9

Weight calculation:  length (m) × width (m) × thickness (mm) × specific gravity = kilogram (kg) , such as:

              C1020P1/4H 2.0×600×1500 Weight: 2.0×0.6×1.5×8.9 = 16kg

              C1020P1/2H 1.0×1000×1000 Weight: 1×1××8.9 = 8.9kg

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