PowerSteel.eu CS and Alloy steel 1.7729 / 20CrMoVTiB4-10+QT / Durehete™ 1055 / Alloy T41

1.7729 / 20CrMoVTiB4-10+QT / Durehete™ 1055 / Alloy T41

On stock
Round Bars 19–290 mm
Alloy T41is designed for use for bolting, fastener and support rods in turbine, boiler and power plant applications. The material is particularly suitable in elevated temperature areas and where good creep, notch and relaxation resistance is required.
Tensile Strength Rm:
820 – 970 MPa
Yield Strength:
from 660 MPa
Working temperature:
to 570°C
Equivalent or similar:
ČSN 15320

About material

Material 1.7729 is a special alloy steel that falls into the category of both low-temperature and high-temperature materials. Here are some key details about this material:

  • Chemical Composition:
    • Contains approximately 0.17–0.23% carbon ©.
    • Has a maximum silicon (Si) content of 0.4%.
    • Contains 0.35–0.75% manganese (Mn).
    • Has a maximum nickel (Ni) content of 0.2%.
    • Contains trace amounts of phosphorus (P) and sulfur (S) (both less than 0.02%).
    • Contains 0.9–1.2% chromium (Cr).
    • Has 0.9–1.1% molybdenum (Mo).
    • Contains 0.6–0.8% vanadium (V).
    • Has 0.07–0.15% titanium (Ti).
    • Contains a maximum of 0.2% aluminum (Al).
    • Has a maximum copper (Cu) content of 0.02%.
    • Contains trace amounts of arsenic (As) (between 0.001% and 0.01%).
    • Has a maximum boron (B) content of 0.02%.
  • Mechanical Properties (in quenched and tempered conditions):
    • Tensile Strength (Rm): 820–1000 MPa.
    • Yield Strength (Rp0.2): 660 MPa.
    • Charpy V-notch Impact Toughness (KV) at +20°C: 27–40 J.
    • Minimum Elongation at Fracture (A): 15%.
    • Reduction of Area at Fracture (Z): 50%.

This material is commonly used for screws and other fasteners in applications with extreme temperatures, as its properties are optimized for such conditions.

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