AISI 4145 H MODIFIED Quenched & Tempered Tube

Alternative and trade names
AISI 4145 H MODIFIED, UNS G41450
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Description

AISI 4145H is a chromium – molybdenum low alloy tempered steel. It has improved hardenability and is more is commonly used in the high strength condition with min.110 KSI yield.

Related Standards

Equivalent Materials

This material data has been provided by Sverdrup Steel.

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

Properties

Dimension

PropertyValue

Diameter

88.9 - 406.4 mm

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Mechanical

PropertyTemperatureValue

Charpy impact energy, V-notch

-20.0 °C

27 J

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Elongation

23.0 °C

14.5 - 20 %

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Hardness, Brinell

23.0 °C

233 - 341 [-]

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Tensile strength

23.0 °C

896 - 1068 MPa

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Yield strength Rp0.2

23.0 °C

689 - 758 MPa

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Chemical properties

PropertyValue

Carbon

0.43 - 0.48 %

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Chromium

0.8 - 1.1 %

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Iron

Balance

Manganese

0.75 - 1 %

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Molybdenum

0.15 - 0.35 %

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Phosphorus

0.03 %

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Silicon

0.15 - 0.35 %

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Sulfur

0.025 %

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Technological properties

Property
Application areas

AISI 4145H is a low alloy steel suitable for downhole drilling tools such as subs, x-overs, drill collars, pup-joints and fishing tools. General engineering applications include components exposed to heavy strain, such as shafts, gear, bolts etc. AISI 4145H can also be used in hardened condition as machine parts exposed to heavy wear.

Heat Treatment

Quenched and Tempered

Welding

Poor, can be welded.