17-4 PH DH1150 Bar

Alternative and trade names
17-4 PH, Alloy 1.4542, 17-4 PH
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Description

17-4 PH is a martensitic precipitation hardening stainless steel with additions of copper (Cu), niobium (Nb) and tantalum (Ta). The grade combines high strength and hardness values with moderate corrosion resistance. Different heat treatment temperatures can optimize mechanical properties, e.g. yield strength at 1100 – 1300MPa. Our stock material is double aged at 1150°F – defined as DH1150. Age hardening is can also be performed at 480°C to 620°C in a one-step process, where the lowest temperature gives the highest strength. To achieve good toughness at low temperatures, precipitation-hardening temperatures below 550°C are not recommended.

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

25.4 - 355.6 mm

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Mechanical

PropertyValueTemperature

Charpy impact energy, V-notch

41 J

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-46.0 °C

Elongation

16 %

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23.0 °C

Hardness, Brinell

255 [-]

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23.0 °C

Tensile strength

860 MPa

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23.0 °C

Yield strength Rp0.2

725 MPa

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23.0 °C

Chemical properties

Property

Carbon

0.07 %

Chromium

15 - 17.5 %

Copper

3 - 5 %

Iron

Balance

Manganese

1 %

Nickel

3 - 5 %

Other

0.15 - 0.45 %

Nb+Ta

Phosphorus

0.04 %

Silicon

1 %

Sulfur

0.03 %

Technological properties

Property
Application areas

chemical, petrochemical, paper and general metalworking industries

Heat Treatment

Solution annealing at 1000 to 1050°C, hardened at 480°C (H900) to 621°C (H1150)

Welding

Good, Pre-heating and post-heating practices used for standard hardenable stainless grades are not required. Min. RREN: 17