Differences stainless steel 316 / 316L / 316Ti
We Learn what are Differences stainless steel 316 / 316L / 316Ti right here.
Stainless steel 316 is a chromium nickel based steel that has higher resistance to various substances due to the addition of molybdenum to its composition. Molybdenum makes SS 316 generally more corrosion resistant, with specific resistance to chlorine pitting. Compared to other stainless steels, SS 316 has also been found to be more suitable for high-temperature or high-temperature areas. It has a higher heat resistance than 304, but in other aspects it has many of the same general characteristics.
The corrosion resistance of 316 is particularly effective for chemicals, such as those used in the paper and textile industries. This metal has other common applications in food processing equipment, chemical processing, nuts and bolts, and medical implants.
Although metal is flexible under hot and cold working techniques, it cannot be worked hardened by heat treatment, and is generally considered to have lower weldability compared to 304 type stainless steel. However, it is still superior to many other stainless steel grades in terms of machinability.
The design carbon content of stainless steel 316L is much lower than its 316 counterpart. Therefore, 316L is suitable for areas where carbon precipitation needs to be avoided. This metal is commonly used in weldments, where its special carbon content combined with welding ensures a high degree of resistance to general corrosion, and can also be used in heavy components.
316L is considered to be more resistant to oxidation than Type 316, especially in warm marine environments. Once again, its low carbon content can protect it from carbon precipitation. This metal also exhibits resistance at extremely low temperatures, even as low as low temperatures. In terms of heat resistance, 316L exhibits better creep resistance, fracture stress resistance, and overall strength than other stainless steel grades.
Many of the same work practices that are valid for Type 316 can also be used for 316L, including weldability and cold work hardening. In addition, 316 does not require post job annealing to greatly improve its corrosion resistance, but annealing can be used in some cases.
Stainless steel 316Ti is known as the stable grade of type 316 and is one of the two types of 316 stainless steels recommended for higher temperature applications. This brand contains a small amount (usually only 0.5%) of titanium. Although it still has many characteristics of other 316 grades, adding titanium can protect 316Ti from precipitation at high temperatures, even after prolonged exposure.
Molybdenum is also added to the composition of 316Ti. Like other 316 grades, molybdenum enhances protection against corrosion, chloride solution pitting, and strength when placed in high-temperature environments. However, its high temperature resistance is also more complex due to its titanium content, which makes 316Ti unaffected by precipitation at these temperatures. In addition, the metal is resistant to acids such as sulfuric acid, hydrochloric acid, and acidic sulfates.
316Ti is commonly used in heat exchangers, paper mill equipment, and building components in marine environments
316Ti is a steel grade developed to solve intergranular corrosion of 316 by adding titanium to it. It has good intergranular corrosion resistance, and has improved corrosion resistance in dilute H2SO4, H3PO4, organic acids, and marine atmosphere. Other properties are similar to 316.
1、 316Ti corresponding brand: 1. National standard GB-T standard: digital brand: S31668, new brand: 06Cr17Ni12Mo3Ti, old brand: 0Cr18Ni12Mo3Ti, 2. American standard: ASTMA standard: S31635, SAE standard: 1, UNS standard: 316Ti, 3. Japanese standard JIS standard: sus316Ti, 4. German standard DIN standard: 1.4571, 5. European standard EN standard: X6CrNiMoTi17-12-2, French standard NF standard: z6cndt17-12, British standard BS standard: 320s31320s17, Sweden: 234323350 NTR standard: APMT.
2、 Chemical composition of 316Ti: ⑴ Carbon C ≤ 0.08, ⑵ Silicon Si: ≤ 1.00, ⑶ Manganese Mn: ≤ 2.00, ⑷ Phosphorus P: ≤ 0.045, ⑸ Sulfur S: ≤ 0.030, (6) Chromium Cr: 16.00~18.00, (7) Nickel Ni: 10.00~14.00, (8) Molybdenum Mo: 2.00~3.00, (9) Nitrogen N: -, (10) Copper Cu: -, (11) Other elements: Ti ≥ 5C~0.70.
3、 Physical properties of 316Ti: ① Density density (20 ℃)
/Kg/dm3: “7.9, ② melting point/℃: -, ③ specific heat capacity (0-100 ℃)/kg/(kg. k): 0.5”, ④ thermal conductivity/w/(m.k)
100 ℃ -: “16”, ⑸ Thermal conductivity/w/(m.k)
500℃-:
“24”, ⑥ Linear expansion coefficient
/(10-6/k)
0~100 ℃: “15.7”, ⑦ Linear expansion coefficient/(10-6/k)
0~532℃:
“17.6”, ⑧ Resistivity (20 ℃)
/(Ω. mm2/m): “0.75”, ⑨ Longitudinal elastic modulus
(20 ℃)/GPa: “199, ⑩ Magnetic: None.”.
4、 Mechanical properties of 316Ti: ⑴ Delivery status: bar solution treatment, plate solution pickling, ⑵ Tensile strength (RM/MPa): 530, ⑶ Elongation strength (Rp0.2/MPa): 205, ⑷ Elongation A/%: 40, ⑸ Reduction of area (Z/%): 55.
5、 316Ti heat treatment: ① hardness HBW ≤: solid solution 187, hardness HRB ≤: 90, ② heating temperature: 1000~1100, ③ heating method: rapid cooling.
International grades of 316 / 316L / 316Ti
| Standard | 316 | 316L | 316Ti |
|---|---|---|---|
| UNESCO | S31600 | S31603 | S31635 |
| WERKSTOFF NR. | 1.4401 | 1.4404 | 1.4571 |
Physical properties – SS 316 / SS 316L / SS 316Ti
| Density | 7.99 g/cm3 or 0.29 lb/in3 |
| Melting point | 1371 – 1399 (° C) or 2500 – 2550 (° F) |
| Annealing | 1040 (° C) or 1900 (° F) |
| Quenching | fast air or water |
Chemical Composition – 316L / 316Ti / 316 Stainless Steel
| Chemial % | 316 | 316L | 316Ti |
|---|---|---|---|
| Ni | 11.0 – 14.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| C | max 0.08 | max 0.035 | max 0.08 |
| Mn | max 2.0 | max 2.0 | max 2.0 |
| S | 0.045 max | 0.045 max | 0.045 max |
| P | max 0.30 | max 0.30 | max 0.30 |
| Si | max 1.0 | max 1.0 | mx 0.75 |
| Cr | 16.0 – 18.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Mo | 2.0 – 3.0 | 2.0 – 3.0 | 2.0 – 3.0 |
| Ti | 5x(C+N) – 0.70 | ||
| N | max 0.10 |