What are 304 and 316 stainless steel?
304 Stainless Steel
316 Stainless Steel
How are 304 and 316 stainless steel classified?
What is the difference between 304 and 316 stainless steel?
Physical properties 304 VS 316 stainless steel
|Density||8.00 g/cm^3||8.00 g/cm^3|
|Thermal expansion||17.2 x10^-6/K||15.9 x 10^-6|
|Modulus of elasticity||193 Pa||193 Pa|
|Thermal conductivity||16.2 W/mK||16.3 W/mK|
|Tensile strength||500-700 MPa||400-620 MPa|
|Elongation A50 mm||45 % min||45 % min|
|Hardness (Brinell)||Max 215 HB||Max 149 HB|
Pros and cons of 304 and 316 stainless steel
Pros of 304 stainless steel
- 304 stainless steel is resistant to corrosion and intergranular corrosion. Strong corrosion resistance is found in oxidizing acids. These include concentrations below 65% of the boiling point for nitric. Good corrosion resistance is also found in most alkali solutions and organic and inorganic acids.
- High-quality cold and hot forming processes and excellent performance. Can be processed plate, tube, line, strip, type products for manufacturing cold heading, deep punching, deep punching forming parts.
- Better low-temperature performance. Under the condition of -180℃, the strength, elongation, and area reduction rate are good.
- It has good weldability. We can often use welding methods before and without post-welding heat treatment.
- Low price
Cons of 304 stainless steel
- Large cross-sectional sizes of steel are sensitive to intergranular corrosion after welding.
- Water containing C1 (including moist air) is susceptible to stress corrosion.
- Low mechanical strength, such as poor cutting properties.
Pros of 316 stainless steel
- Durability: 316 stainless steel is not only tough and versatile but at high temperatures can be maintained for a longer time than the 304 types.
- Easy to process: 316 stainless steel has excellent weldability and machinability. Even at low temperatures, it also has excellent toughness. You can quickly process it into the products you want.
- Corrosion resistance: 316 stainless steel added the chemical composition of molybdenum, making it more resistant to corrosion than 304 or other stainless steel alloys. 316’s resistance to corrosion makes it ideal for medical and pharmaceutical applications. This allows 316 steel to be used in highly acidic environments without causing any damage. It can also withstand strong disinfectants and the high temperatures needed to sterilize.
Cons of 316 stainless steel
- High cost
Applications of 304 and 316 stainless steel
Application of 304 stainless steel
304 is commonly used in our everyday medical and food industries because it can withstand powerful cleaning chemicals without corroding. 304 type stainless is a low-carbon and high-chromium content, making it one of the most versatile austenitic stainless metals. All 18% and 8% nickel austenitic metal alloys are available. Type 304 is recognized for its resistance to oxidation, corrosion, and durability. 304 products can be made in many finishes to provide various industries options. Typical applications for 304 stainless steel include:
- Kitchen appliances: various pots, pans, hoods, sinks, spatulas, etc.
- Transportation equipment: various car parts, roadblocks, light poles, etc.
- Construction industry: indoor construction, such as wall panels, elevators, etc.
- Medical equipment: surgical tools, monitoring equipment, etc.
There are significant differences in the nickel and chromium contents of 304 and316 stainless steel sheets. The former has a higher chromium content, while the latter contains more nickel.
Application of 316 stainless steel
- Chemical equipment: reservoirs and pipelines for chemical applications, chemical storage, and processing equipment, and refinery infrastructure.
- Mechanical parts: ship tracks, steel wire rope, ship ladders, ship hulls.
- Medical equipment: large pharmaceutical equipment, surgical equipment, etc.
How to distinguish between 304 and 316 stainless steel?
Which is better: 304 or 316 stainless steel?
- Stainless Steel Sheet
- Stainless Steel Plate
- Stainless Steel Tube
- Stainless Steel Pipe
- Stainless Steel Bar
- Stainless Steel Rod
- Stainless Steel Coil
- Stainless Steel Strip
- Stainless Steel Angle
- Stainless Steel Flat Bar
- Stainless Steel Channel
- Stainless Steel Wire
- Stainless Steel Wire Mesh
- Stainless Steel Rectangular Tube
- Stainless Steel Cable
- Stainless Steel Threaded Rod