ASTM A312/A312M Grade Type XM-19 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:1135°C - 1294°C
Application:Seamless and welded austenitic stainless steel tube
ASTM A312/A312M Grade Type XM-19 Material Chemical Composition
The chemical composition of the ASTM A312/A312M Grade Type XM-19 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Vanadium (V) | 0.1000 | 0.3000 |
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 11.5000 | 13.5000 |
| Niobium (Nb) | 0.1000 | 0.3000 |
| Nitrogen (N) | 0.2000 | 0.4000 |
| Molybdenum (Mo) | 1.5000 | 3.0000 |
| Manganese (Mn) | 4.0000 | 6.0000 |
| Chromium (Cr) | 20.5000 | 23.5000 |
| Carbon (C) | - | 0.0600 |
ASTM A312/A312M Grade Type XM-19 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 XM-19 steel are as follows:
| YieldRp0.2 | ≤ 662 (MPa) |
| TeileRm | ≤ 735 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 134 |
ASTM A312/A312M Grade Type XM-19 Material Thermal Properties
The thermal performance parameters of the ASTM A312/A312M Grade Type XM-19 steel are as follows:
| Temperature (°C) | 34 | 322 | 357 |
| Modulus of elasticity (GPa) | - | 873 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 432 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 324 |
| Poisson’s coefficient, ν | - | - | 124 |
ASTM A312/A312M Grade Type XM-19 Material Machining Technology
ASTM A312/A312M Grade Type XM-19 is an austenitic stainless steel which contains a high level of chromium and nickel. This gives it excellent corrosion and heat resistance, making it an ideal choice for applications such as automotive exteriors, food processing and storage and other items exposed to high temperatures and moisture. It also has superior Machinability, making it well-suited for machining operations such as turning, drilling and grinding. Its mechanical properties are also high, including a yield strength of 80,000 PSI and a tensile strength of 105,000 PSI.