Galvanizing amount
Standard value of galvanizing amount: Galvanizing amount is a commonly used and effective method to express the thickness of the zinc layer of galvanized sheets. The unit of galvanizing amount is g/m2.
Mechanical behavior
(1) Tensile test:
①Performance indicators: Generally speaking, only galvanized sheets for structural use, drawing use and deep drawing use have tensile performance requirements. Among them, galvanized sheets for structural use require yield point, tensile strength and elongation, etc.; for tensile use, only elongation is required.
②Test method: The same as the general thin steel plate test method.
(2)Bending test:
Bending test is the main item to measure the process performance of thin plates, but the requirements of various countries' standards for various galvanized sheets are not consistent. The American standards do not require bending and tensile tests except for the structural level. In Japan, bending tests are required for all products except structural grade, building corrugated panels and general corrugated panels.
Requirements: It is generally required that after the galvanized sheet is bent 180 degrees, the zinc layer shall not be detached from the outer surface, and the base of the sheet shall not be cracked or broken.
Chemical composition
The requirements for the chemical composition of galvanized sheet substrates vary from country to country. National standards generally test the content of carbon, manganese, phosphorus, sulfur, and silicon.
Package
It is divided into two types: galvanized sheet cut into fixed lengths and galvanized sheet packaging in coils. It is generally packed in iron sheets, lined with moisture-proof paper, and tied to a bracket with an iron waist. The bundling should be secure to prevent the galvanized sheets inside from rubbing against each other.
Standard
JIS G3302-94 galvanized steel plate;
JIS G3312-94 painted galvanized iron sheet;
JIS G3313-90(96) Electro-galvanized steel sheets and steel strips; General requirements for hot-dip galvanized steel sheets;
ASTM A526-90 commercial grade hot-dip galvanized steel sheet;
ASTMA 527-90(75) bite forming grade hot-dip galvanized steel sheet;
ASTMA528-90 deep drawing grade hot-dip galvanized steel sheet; hot-dip galvanized steel sheet for roofing and siding;
ASTMA444-89 hot-dip galvanized steel sheet for trenches;
ASTM A446-9 3 structural grade hot-dip galvanized steel sheet;
ASTMA599-92 cold-rolled electro-galvanized steel sheet;
ASTMA642-90 hot-dip galvanized special deoxidized deep-drawing grade thin steel plate;
ΓOCT7118-78 galvanized steel plate;
DINEN 10142-91 Part 1 Mild steel hot-dip galvanized steel strip and plate;
DINEN1012-92 Part 2 Hot-dip galvanized sheet steel.
Index
Galvanized sheet and strip products are mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries. Among them, the construction industry is mainly used to make anti-corrosion industrial and civil building roof panels, roof grilles, etc.; the light industry industry uses it to make home appliance casings, civil chimneys, kitchen utensils, etc.; the automotive industry is mainly used to make corrosion-resistant parts for cars, etc. ; Agriculture, animal husbandry and fishery are mainly used for grain storage and transportation, freezing processing equipment for meat and aquatic products, etc.; commerce is mainly used for storage and transportation of materials, packaging equipment, etc.
List of technical indicators, performance and specifications of galvanized sheets
Hot-dip galvanized steel sheet (coil) surface treatment
L chromic acid passivation
Y oil
LY Chromic acid passivation plus oiling
GZ finishing machine finishing
Surface structure
Surface Structure Characteristics Usage
Normal spangle (Z) Sprinkle is a splatter formed by condensation of the zinc layer under normal conditions after galvanizing. General purpose
GZ polishing machine is used to smooth the galvanized sheet through a finishing machine to smooth out the spangle on the surface of the galvanized sheet. It is mainly used as the substrate for color-coated sheets.
Medium width galvanized sheet
Processing properties Yield strength Tensile strength Elongation % 180o Cold bending
Ordinary PV - 270-500 - d=0, intact, no dezincification Deep drawn SC - 270-380 ≥30 d=0, intact, no dezincification
Mechanical engagement JY - 270-500 - d=0, intact, no dezincification Super deep drawing SC - 270-380 ≥30 d=0, intact, no dezincification
Structure JG ≥240 ≥370 ≥18 d=0, intact, no dezincification
