NMX Grade T-91 Structural and constructional steels
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NMX Grade T-91 Chemical Composition
NMX-B-191: 1988 / Seamless cold-draw intermediante alloy-steel heat exchanger and condenser tubes
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NMX Grade T-91 Physical Properties
Temperature
This material has 150 properties — only a subset is shown here.
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NMX Grade T-91 Heat Treatments
- Normalize and temper; Austenitizing/Solutioning at 1900-1975°F (1040-1080°C); Tempering at 1350-1470°F (730-800°C).
- The tubes shall be normalized from the temperature range of 1040 to 1095°C and tempered at 730°C minimum. After the final cold draw pass tubes shall be heat treated at 675°C or higher.
NMX Grade T-91 Mechanical Properties
Temperature
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NMX Grade T-91 International Equivalent Materials
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Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.
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- 24Composition
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- 3Physical Properties
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