18-8 Stainless Steel Unthreaded Spacers

There are various types of stainless steel with different properties, but according to the characteristics of the metallographic organization, they can be divided into the following categories:

Martensitic stainless steel, ferritic stainless steel: its alloy composition is mainly Cr, and its content is 12 to 8%. Commonly 1Cr13, 2Cr13, 3Cr13, 4Cr13, 9Cr18, 30Cr13Mo, etc. This type of steel has appropriate hardness, strength, and good oxidation resistance after quenching and tempering. During cutting and machining, the chips are easy to abrade and wear the tool. When the carbon content increases to 0.4 to 0.5%, the martensitic stainless steel cutting machinability becomes better. The main alloy composition of ferritic stainless steel is also Cr and its content is similar to that of martensitic stainless steel. In the cutting process, its performance is similar to the former, except that its hardness is lower and toughness is increased. In short, these two kinds of stainless steel are in the cutting process as long as the choice of tool material is appropriate, with the appropriate geometric angle, cutting processing is still not very difficult.

Austenitic stainless steel and austenitic plus ferritic stainless steel: these two stainless steel composition not only contains chromium, but also contains a fairly high nickel (generally 7 to 20%), because this type of steel contains more nickel or manganese, so its organizational structure is stable, heat treatment is difficult to make it strengthen. This type of steel in the cutting process chip continuous, fracture difficult, while easy to produce work hardening. Austenitic-ferritic stainless steel only contains a certain amount of ferrite in the organization, there is also a certain amount of hardness of intermetallic compounds, the rest of the properties are similar to austenitic steel, so cutting, these two materials are more difficult to process. The grades of austenitic stainless steel are 1Cr18N9Ti, 00Cr18Ni10, O0Cr18Ni14M02Cu2, 0Cr18Ni12M02Ti, 2Cr13Mn9Ni4, etc. Common austenitic plus ferritic stainless steels are 0Cr21N95Ti, 1Cr18Mn10Ni5, 1Cr18Ni11Si4A1Ti, etc.

There is also precipitation hardening stainless steel in the stainless steel. This type of steel contains high chromium and nickel but also contains thallium, aluminum, titanium, molybdenum, and other alloying elements that can play a precipitation-hardening effect so that the steel has high strength and hardness. This type of stainless steel is 0Cr17Ni4Cn4Nb, oCr15Ni7M02A1.

Packing: Inner is Poly foam, out is carton. Then pallet. Carton size: 29*19*19.5CM and 23.5*17.5*8, CM and pallet size is: 215*100*90CM, or as your requirement.

Packing for CNC aluminum parts:

1. Usual packing: By pearl cotton/bubble bag/plastic wrap + carton box, 0.5-10kg/carton box.

2. Special packing(for large part/large quantity order): By pearl cotton/bubble bag/plastic wrap +carton box+wooden box.

3. As customers' requirement for CNC aluminum parts