S165M QT900 Bar

Alternative and trade names
S165M, ALLOY 1.4418, S165M, 2387

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Description

S165M is a high strength low carbon martensitic/ austenitic stainless steel. It combines high strength, good fatigue resistance with good weldability, properties which are maintained after welding. Two minimum tensile levels are often used; QT760 and QT900. QT900 is mostly used by the industry.

Related Standards

Equivalent Materials

This material data has been provided by Sverdrup Steel.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

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Applications

Aerospace

Fasteners For Aerospace

Bolts

Construction

Building Elements

Shafts

Manufacturing

Machining

Other Machine Tools

Energy

Hydraulic Energy

Aerospace Engines & Propulsion

Propellers

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Properties

Dimension

Property	Value
Diameter	10 - 410 mm Show Supplier Material materials with Diameter of 10 - 410 mm

Mechanical

Property	Temperature	Value
Charpy impact energy, V-notch	-40.0 °C	32 J Show Supplier Material materials with Charpy impact energy, V-notch of 32 J
Elongation	23.0 °C	16 % Show Supplier Material materials with Elongation of 16 %
Hardness, Brinell	23.0 °C	280 - 340 [-] Show Supplier Material materials with Hardness, Brinell of 280 - 340 [-]
Tensile strength	23.0 °C	900 - 1100 MPa Show Supplier Material materials with Tensile strength of 900 - 1100 MPa
Yield strength Rp0.2	23.0 °C	750 MPa Show Supplier Material materials with Yield strength Rp0.2 of 750 MPa

Chemical properties

Property	Value
Carbon	0.06 % Show Supplier Material materials with Carbon of 0.06 %
Chromium	15 - 17 % Show Supplier Material materials with Chromium of 15 - 17 %
Iron	Balance
Manganese	0.6 - 1.5 % Show Supplier Material materials with Manganese of 0.6 - 1.5 %
Molybdenum	0.8 - 1.5 % Show Supplier Material materials with Molybdenum of 0.8 - 1.5 %
Nickel	4 - 6 % Show Supplier Material materials with Nickel of 4 - 6 %
Nitrogen	0.02 % Show Supplier Material materials with Nitrogen of 0.02 %
Phosphorus	0.04 % Show Supplier Material materials with Phosphorus of 0.04 %
Silicon	0.3 - 0.7 % Show Supplier Material materials with Silicon of 0.3 - 0.7 %
Sulfur	0.005 - 0.03 % Show Supplier Material materials with Sulfur of 0.005 - 0.03 %

Technological properties

Property
Application areas	The alloy has been designed to resist erosion corrosion or cavitation experienced in hydraulic applications. General areas for applications: Shafts, propellers, spindles, bolts, etc.
Corrosion properties	S165M is designed for application in slightly corrosive environment. Corrosion resistance is at the level of AISI 304L in most environments, however insensitive to intergranular corrosion.
Heat Treatment	Austenitize and quench from 950 to 1050°C and immediate temper at 600°C for 8 hours followed by cooling in air.
Welding	Good, the low carbon martensite with the finely dispersed residual austenite yields an excellent HAZ toughness in the as welded condition. Preheating to 100°C – 200°C is suggested for very thick section or when the stress concentration after cooling require it.