ASTM A312/A312M Grade Type 316H Introduce
ASTM A312/A312M is the standard specification for seamless and welded austenitic stainless steel pipes for high temperature and general corrosive service. It covers austenitic stainless steel pipes used in corrosive and high temperature applications, including pipes for pressure vessels and heat exchangers.
Smelting temperature:1965°C - 1214°C
Application:Seamless and welded austenitic stainless steel tube
ASTM A312/A312M Grade Type 316H Material Chemical Composition
The chemical composition of the ASTM A312/A312M Grade Type 316H steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 11.0000 | 14.0000 |
| Molybdenum (Mo) | 2.0000 | 3.0000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 16.0000 | 18.0000 |
| Carbon (C) | 0.0400 | 0.1000 |
ASTM A312/A312M Grade Type 316H Material Mechanical Properties
ASTM A312/A312M is a standard specification for seamless and welded austenitic stainless steel pipes used for high-temperature and general corrosive service. This specification covers nominal wall thickness, minimum wall thickness, and ASTM's requirements for chemical composition, mechanical properties, and burst testing of these stainless steel pipes. we will focus primarily on the mechanical properties of this stainless-steel pipe, as the most important factor for assessing the suitability of a pipe for a particular application will be determined by its mechanical properties.
The mechanical properties of the ASTM A312/A312M Grade Type 316H steel are as follows:
| YieldRp0.2 | ≤ 849 (MPa) |
| TeileRm | ≤ 354 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 21% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 142 |
ASTM A312/A312M Grade Type 316H Material Thermal Properties
The thermal performance parameters of the ASTM A312/A312M Grade Type 316H steel are as follows:
| Temperature (°C) | 22 | 587 | 133 |
| Modulus of elasticity (GPa) | - | 898 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 21 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 13.2 |
| Specific thermal capacity (J/kg·°C) | - | 123 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 114 |
| Poisson’s coefficient, ν | - | - | 431 |
ASTM A312/A312M Grade Type 316H Material Machining Technology
Machining ASTM A312/A312M Grade Type 316H steel is a complex process, but it can be highly rewarding if done correctly. The key to success is to select the right tools and cutting strategies, employ coolant strategies to reduce heat generation and tool wear, and utilize the right finishing techniques to achieve the desired surface quality. With experience and knowledge of how to best work with this special type of steel, skilled machinists can produce high-quality parts and components from ASTM A312/A312M Grade Type 316H steel.