ASTM A312 T316 Stainless Steel Pipes other steel Pipes & Tubes
More about ASTM A312 TP316L Stainless Steel Welded Pipes & its grade
Background of T316 Stainless Steel Pipes
Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. It has excellent forming and welding characteristics. It is readily brake or roll formed into a variety of parts for applications in the industrial, architectural, and transportation fields. Grade 316 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.
Grade 316L, the low carbon version of 316 and is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). Grade 316H, with its higher carbon content has application at elevated temperatures, as does stabilised grade 316Ti.
The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.
Specifications
Stainless Steel [SS] 316 / 316H / 316 L / 316N / 316Ti | |
AISI | 316 / 316H / 316 L / 316N / 316Ti |
UNS | S31600 / S31609 / S31603 / S31651 / S31635 |
Werkstoff Nr. | 1.4401 / 1.4404 / 1.4432 / 1.4435 / 1.4429 / 1.4571 |
Composition of 316L Stainless Steel Pipes and Tubes.
Table 1.Composition ranges for 316L grade of stainless steels.
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
316 | Min | - | - | - | 0 | - | 16.0 | 2.00 | 10.0 | - |
Max | 0.08 | 2.0 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | 0.10 | |
316L | Min | - | - | - | - | - | 16.0 | 2.00 | 10.0 | - |
Max | 0.03 | 2.0 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | 0.10 | |
316H | Min | 0.04 | 0.04 | 0 | - | - | 16.0 | 2.00 | 10.0 | - |
max | 0.10 | 0.10 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | - |
Mechanical Properties of 316L Stainless Steel Pipes & Tube
Table 2.Mechanical properties of 316L grade stainless steels.
Grade | Tensile Str | Yield Str | Elong | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
316 | 515 | 205 | 40 | 95 | 217 |
316L | 485 | 170 | 40 | 95 | 217 |
316H | 515 | 205 | 40 | 95 | 217 |
Note: 316H also has a requirement for a grain size of ASTM no. 7 or coarser.
Physical Properties of 316L Stainless Steel Pipes & Tubes
Table 3.Typical physical properties for 316L grade stainless steels.
Grade | Density | Elastic Modulus | Mean Co-eff of Thermal Expansion (m/m/°C) | Thermal Conductivity | Specific Heat 0-100°C | Elec Resistivity | |||
0-100°C | 0-315C | 0-538°C | At 100°C | At 500°C | |||||
316/L/H | 8000 | 193 | 15.9 | 16.2 | 17.5 | 16.3 | 21.5 | 500 | 740 |
Grade Specification Comparison of 316L Stainless Steel Pipes & Tubes
Table 4.Grade specifications for 316L grade stainless steels.
Grade | UNS | Old British | Euronorm | Swedish | Japanese | ||
BS | En | No | Name | ||||
316 | S31600 | 316S31 | 58H, 58J | 1.4401 | X5CrNiMo17-12-2 | 2347 | SUS 316 |
316L | S31603 | 316S11 | - | 1.4404 | X2CrNiMo17-12-2 | 2348 | SUS 316L |
316H | S31609 | 316S51 | - | - | - | - | |
