Common Stamping Material: Electrogalvanized Steel Sheet/Electroplated Tin Plate/Stainless Steel Plate

Electrogalvanized steel sheet

1) Continuous electrogalvanized cold rolled steel sheet

The process of continuously depositing zinc from a deep solution of zinc salt under the action of an electric field on an electric galvanizing operation line to obtain a surface zinc coating on a pre prepared steel strip.

Applicable grades: DX1, DX2, DX3, DX4

Zinc layer code: 14, 28, 42, 56, 70, with two digits indicating the adhesion amount of zinc on the surface of the steel plate (g/m2).

Symbols: D-electroplating, X-zinc, 1-commercial grade, 2-Stamping grade, 3-deep Stamping, 4-structural grade.

Rolling accuracy code: A-advanced accuracy, B-ordinary accuracy.

Surface treatment code: P-phosphate treatment, C-chromic acid treatment, O-oil coating, N-fingerprint resistant treatment.

2) Japanese galvanized steel sheet

Applicable grades: SECC (original board SPCC), SECD (original board SPCD), SECE (original board SPCE)

Zinc layer code: E8, E16, E24, E32

Symbols: S-Steel, E-Electroposition, C-Cold rolled, 4th position C-Common, D-Draw, E-Elongation.

Zinc layer code: E-galvanized layer, 8, 16, 24, 32 represent zinc adhesion, unit: g/m2, coating thickness (single side) 1.4 μ、 four point two μ、 seven μ。

Surface treatment codes: C-chromic acid treatment, O-oil coating, P-phosphoric acid treatment, S-chromic acid treatment+oil coating, Q-phosphoric acid treatment+oil coating, M-no treatment.

Electroplated tin plate

Electroplated tin sheet and strip, also known as Tinning, abbreviated as SPTE, refers to cold rolled low-carbon sheet or strip coated with commercial pure tin on both sides, usually with a thickness ≤ 0.6mm. Tin mainly plays a role in preventing corrosion and rusting. It combines the strength and formability of steel with the corrosion resistance, solderability, and aesthetic appearance of tin in a single material. It has the characteristics of corrosion resistance, non-toxic, high strength, and good ductility, and can be used as packaging materials for canned goods, cable inner and outer protective covers, instrument and telecommunications parts, flashlights, and other small hardware.

Stainless steel plate

Steel that is resistant to weak corrosive media such as air, steam, water, and chemical corrosive media such as acid, alkali, and salt. Also known as stainless and acid resistant steel. In practical applications, steel that is resistant to weak corrosive media corrosion is often referred to as stainless steel, while steel that is resistant to chemical media corrosion is referred to as acid resistant steel. Due to the differences in chemical composition between the two, the former may not necessarily be resistant to chemical medium corrosion, while the latter generally has rust resistance. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel. Chromium is the Urelement that enables stainless steel to obtain corrosion resistance. When the chromium content in the steel reaches about 1.2%, the chromium reacts with the oxygen in the corrosion medium to form a thin oxide film (self passivation film) on the steel surface, which can prevent the steel substrate from further corrosion. In addition to chromium, commonly used alloy elements include nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the requirements of various uses for the structure and properties of stainless steel.

Stainless steel is usually divided into:

1. Ferritic stainless steel. Contains 12% to 30% chromium. Its corrosion resistance, toughness, and weldability increase with the increase of chromium content, and its resistance to chloride stress corrosion is superior to other types of stainless steel.

2. Austenitic stainless steel. It contains more than 18% chromium, as well as about 8% nickel and a small amount of elements such as molybdenum, titanium, and nitrogen. Good comprehensive performance and resistance to corrosion in various media.

3. Austenitic ferrite duplex stainless steel. It has the advantages of both austenitic and ferritic stainless steel, and has superplasticity.

4. Martensitic stainless steel. High strength, but poor plasticity and weldability.

5. Precipitation hardened stainless steel. It has excellent formability and good weldability, and can be used as an ultra-high strength material in the nuclear, aviation, and aerospace industries.

According to composition, it can be divided into Cr system (SUS400), Cr Ni system (SUS300), Cr Mn Ni (SUS200) and Precipitation hardening system (SUS600)