ASTM A312/A312M S31609 Introduce

ASTM A312/A312M is an international standard for seamless, welded, and heavily cold worked austenitic stainless steel pipes. It defines the chemical, mechanical, and metallurgical properties of the steel, along with the required physical and test results for standard pipes. The standard, which was first released in 2001, is published by the American Society for Testing and Materials (ASTM).

Smelting temperature:1768°C - 1896°C

Application:Seamless and welded austenitic stainless steel tube

ASTM A312/A312M S31609 Material Chemical Composition

The chemical composition of the ASTM A312/A312M S31609 steel are as follows:

ElementMinMax
Silicon (Si)-1.0000
Sulfur (S)-0.0300
PhOsphorus (P)-0.0450
Nickel (Ni)11.000014.0000
Molybdenum (Mo)2.00003.0000
Manganese (Mn)-2.0000
Chromium (Cr)16.000018.0000
Carbon (C)0.04000.1000

ASTM A312/A312M S31609 Material Mechanical Properties

The mechanical properties of ASTM A312/A312M S31609 stainless steel pipe are essential in determining the strength, ductility, and toughness of the material. The three main mechanical properties of this material are its yield strength, tensile strength, and modulus of elasticity. The minimum required yield strength of these pipes is 0.2% of the specified ultimate tensile strength, the minimum required ultimate tensile strength is 65 Ksi (448 MPa), and the minimum required modulus of elasticity is 29,000 ksi (200,000 MPa).

The mechanical properties of the ASTM A312/A312M S31609 steel are as follows:

YieldRp0.2 ≤ 621 (MPa)
TeileRm≤ 322 (MPa)
ImpactKV/Ku32(J)
ElongationA41%
Reduction in cross section on fractureZ32%
As-Heat-Treated ConditionSolution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness (HBW)121

ASTM A312/A312M S31609 Material Thermal Properties

The thermal performance parameters of the ASTM A312/A312M S31609 steel are as follows:

Temperature (°C)13962421
Modulus of elasticity (GPa)-848-
Mean coefficient of thermal expaion ×10-6/(°C)--44
Thermal conductivity (W/m·°C)-44.342.2
Specific thermal capacity (J/kg·°C)-331-
Specific electrical resistivity (Ω mm²/m)0.13--
Deity (kg/dm³)--213
Poisson’s coefficient, ν--243

ASTM A312/A312M S31609 Material Machining Technology

Machining ASTM A312/A312M S31609 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 S31609 steel.