Screw material knowledge and common materials

The standard parts on the market mainly include carbon steel, stainless steel and copper.

One carbon steel. We distinguish low carbon steel, medium carbon steel and high carbon steel and alloy steel by the carbon content in carbon steel.

1 Low carbon steel C% ≤0.25% is usually called A3 steel in China. It is basically called 1008, 1015, 1018, 1022, etc. abroad. It is mainly used for products with no hardness requirements such as grade 4.8 bolts, grade 4 nuts and small screws. (Note: The 1022 material is mainly used for drilling screws.)

2 Medium carbon steel 0.25%

3 High carbon steel C%> 0.45%. It is currently not used in the market. Dongguan Screw Factory

4 Alloy steel: Add alloy elements to ordinary carbon steel to increase some special properties of steel: such as 35, 40 chromium molybdenum, SCM435, 10B38. Fangsheng screws mainly use SCM435 chromium molybdenum alloy steel, the main components are C, Si, Mn, P, S, Cr, Mo.

Two stainless steel. Performance level: 45, 50, 60, 70, 80

1 Main austenite (18% Cr, 8% Ni) has good heat resistance, good corrosion resistance and good weldability. A1, A2, A4

2 Martensite and 13% Cr have poor corrosion resistance, high strength and good wear resistance. C1, C2, C4 ferritic stainless steel. 18% Cr has good upsetting properties and stronger corrosion resistance than martensite. The imported materials on the market are mainly Japanese products. Mainly divided into SUS302, SUS304, SUS316 by level. Dongguan Screw Factory

Three copper. Common materials are brass ... zinc-copper alloy. H62, H65 and H68 copper are mainly used as standard parts in the market.

Common materials

a.Low Carbon Steel: Carbon steel Carbon steel is divided into low carbon steel, medium carbon steel, high carbon steel and alloy steel.

b. SS-304: Stainless Steel 304, 316 are all stainless steel

c. SS-302: Stainless Steel 302: good structural toughness

d. Aluminum 5052: Aluminum Alloy 5052 Dongguan Screw Factory

d. Brass: Brass

e. Bronze: Bronze

f. UNS C11000 Copper: Antimony copper