ASTM A312 TP316H Stainless Steel Seamless Pipe Pickled and Annealed Surface
Stainless Steel is often referred to as corrosion-resistant steel – it does not stain, corrode or rust as easily as normal carbon steel. It would however be misleading to say it is corrosion-proof. It differs significantly from standard carbon steel due to the amount of chromium present, which limits surface corrosion unlike carbon steel which will rust when exposed to air and any moisture in the atmosphere. Due to its anti-oxidation qualities, stainless steel is often a popular solution.
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.
Chemical Composition of ASTM A312 TP316H SS Pipe
| Grade | | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| 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 ASTM A312 TP316H SS Pipes
| Grade | Tensile Str
(MPa) min | Yield Str
0.2% Proof
(MPa) min | Elong
(% in 50mm) min | Hardness |
| Rockwell B (HR B) max | Brinell (HB) max |
| 316L | 485 | 170 | 40 | 95 | 217 |
| 316H | 515 | 205 | 40 | 95 | 217 |
Physical properties of TP316H SS Pipe in the Annealed Condition
| Grade | Density
(kg/m3) | Elastic Modulus
(GPa) | Mean Co-eff of Thermal Expansion (µm/m/°C) | Thermal Conductivity
(W/m.K) | Specific Heat 0-100°C
(J/kg.K) | Elec Resistivity
(nΩ.m) |
| 0-100°C | 0-315°C | 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 |
Equivalent Grades of ASTM A312 TP316H SS Pipe
| Grade | UNS No | Old British | Euronorm | Swedish
SS | Japanese
JIS |
| BS | En | No | Name |
| 316L | S31603 | 316S11 | - | 1.4404 | X2CrNiMo17-12-2 | 2348 | SUS 316L |
| 316H | S31609 | 316S51 | - | - | - | - | - |
Apllications
1. Food preparation equipment particularly in chloride environments
2. Laboratory benches & equipment
3. Coastal architectural panelling, railings & trim
4. Boat fittings
5. Chemical containers, including for transport
6. Heat Exchangers
7. Woven or welded screens for mining, quarrying & water filtration
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ASTM A312 TP316H / UNS S31609 Stainless Steel Seamless Pipe Pickled And Annealed Images
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