ASTM A790/A790M S82441 Introduce

The ASTM A790/A790M steel standard outlines specific requirements for welding duplex and stainless steel pipes and fittings. It specifies applicable welding techniques, joint design and thickness, welding procedure specifications, welding related nondestructive examination and weld acceptance criteria. The standard requires that the welding techniques and procedures used must be suitable for the application and are capable of producing a suitable weld.

Smelting temperature:1366°C - 1731°C

Application:Seamless and welded ferritic/austenitic stainless steel tube

ASTM A790/A790M S82441 Material Chemical Composition

The chemical composition of the ASTM A790/A790M S82441 steel are as follows:

ElementMinMax
Carbon (C)-0.0300
Manganese (Mn)2.50004.0000
PhOsphorus (P)-0.0350
Sulfur (S)-0.0050
Silicon (Si)-0.7000
Nickel (Ni)3.00004.5000
Chromium (Cr)23.000025.0000
Molybdenum (Mo)1.00002.0000
Copper (Cu)0.10000.8000
Nitrogen (N)0.20000.3000

ASTM A790/A790M S82441 Material Mechanical Properties

The most important attribute of any material is its tensile strength. This is a measure of its ability to resist breaking under a tensile force, or a force in the opposite direction of the plane of the material. ASTM A790/A790M S82441 steel has excellent tensile strength, with a minimum yield strength of 275MPa and a tensile strength of between 515 MPa to 690 MPa.

The mechanical properties of the ASTM A790/A790M S82441 steel are as follows:

YieldRp0.2 ≤ 999 (MPa)
TeileRm≤ 214 (MPa)
ImpactKV/Ku23(J)
ElongationA23%
Reduction in cross section on fractureZ42%
As-Heat-Treated ConditionSolution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness (HBW)244

ASTM A790/A790M S82441 Material Thermal Properties

The thermal performance parameters of the ASTM A790/A790M S82441 steel are as follows:

Temperature (°C)11311219
Modulus of elasticity (GPa)-454-
Mean coefficient of thermal expaion ×10-6/(°C)--42
Thermal conductivity (W/m·°C)-12.323.2
Specific thermal capacity (J/kg·°C)-221-
Specific electrical resistivity (Ω mm²/m)0.31--
Deity (kg/dm³)--313
Poisson’s coefficient, ν--143

ASTM A790/A790M S82441 Material Machining Technology

When turning and milling ASTM A790/A790M S82441 steel, the type of cutting tool used can have an effect on the speed and accuracy of the machining operation. High-speed steel (HSS) and carbide cutting tools are the most common, with HSS commonly used for high-speed applications and carbide for finishing operations. It is recommended to use a coated carbide tool for increased performance, as this will reduce tool wear and increase cutting speed. Additionally, a positive rake angle should be used for turning operations and a negative one for milling operations in order to ensure maximum results.