Properties of V-4Cr-4Ti

PROPERTY           VALUE                  REFERENCE (and COMMENTS)

RT Density         6.05x103 kg/m3           [3]

Melting temp.      1900 +/- 25 C            [3]

Electrical resistivity (10-6 ohm-m)
       0.328 [1 + 2.028x10-3 (T - 20)]        [4,6]

Specific heat (kJ/kg-K)
     0.57551 [1 - 36.68/(T + 273)]            [1]  (V-5Cr-5Ti)

Thermal conductivity (W/m-K)
     30.35 [1 + 2.835x10-4 (T - 20)]          [1]  (V-5Cr-5Ti)

Thermal expansion coefficient
     9.08 (1 + 1.21x10-4 T + 2.284x10-7 T2 - 2.40x10-10 T3) x 10-6/K 
                                              [1]  (V-5Cr-5Ti)

Young's modulus (GPa)
    E = 125.6 [1 - 7.69x10-5 (T - 20)]        [7] (RT to 1627 C)

Shear modulus (Gpa)
    G = 45.9 [1 - 1.82x10-4 (T - 20)]         [7] (RT to 677 C)

Ultimate Tensile Strength (MPa)
  Su =  488 (1.0450 - 2.3735x10-3 T + 6.2675x10-6 T2 - 4.7504x10-9 T3)
                                         [8-12]    (RT-700 C, see also Fig. 1)

Ultimate Design Tensile Strength (MPa)
    Sud =  424 (1.0450 - 2.3735x10-3 T + 6.2675x10-6 T2 - 4.7504x10-9 T3)
                                         [8-12]    (RT-700 C, see also Fig. 1)

Yield Strength (MPa)
    Sy =  402 (1.0635 - 3.3238x10-3 T + 7.5229x10-6 T2 - 5.3461x10-9 T3)
                                         [8-12]    (RT-700 C, see also Fig. 2)

Design Yield Strength (MPa)
    Syd =  322 (1.0635 - 3.3238x10-3 T + 7.5229x10-6 T2 - 5.3461x10-9 T3)
                                         [8-12]    (RT-700 C, see also Fig. 2)

Uniform elongation (%)
    eu =  22.3 (0.9733 + 1.4600x10-3 T - 6.2966x10-5 T2 + 5.1635x10-9 T3)
                                         [8-12]    (T[C], see also Fig. 3)

Total elongation (%)
    et =  30.8 (0.9972 + 1.8008x10-4 T - 2.0547x10-6 T2 + 1.4227x10-9 T3)
                                         [8-12]    (T[C], see also Fig. 4)

Reduction in area (%)
    -delta-A/Ao =  91.3 (1.0118 - 6.6008x10-4 T + 3.5173x10-6 T2 - 5.2599x10-9 T3)
                                         [8-12]    (T[C], see also Fig. 5)

Thermal creep (%/hour)
    d(ect)/dt = 1.89 x 10-28 S9.94             (S[MPa], T=600 C)
                                         [13]    (320-440 MPa)

Secondary thermal creep rate vs. stress at 600 C
                    (for 316L(N), Fe-9Cr-1MoVNb and V-4Cr-4Ti)
                    (see Fig. 11)

Stress vs. Larsen Miller Parameter (P =  T (20 + log tr))
    log S = -0.92522 + 0.34967 (P/1000) - 0.0087 (P/1000)2
                                         [13-14] (387-420 MPa)
                                         (P/1000 > 20, see also Fig. 6)
(Fig. 7 shows allowable primary stress vs. rupture time)

Allowable primary membrane stress (Sm) RT-700 C
           (see Fig. 9)

Thermal stress factor, (3Sm)/{[alpha]m E [k (1-[nu])]-1}
                    (for 316L(N), Fe-9Cr-1MoVNb and V-4Cr-4Ti)
                    (see Fig. 10)

Irradiation creep rate (%/dpa)
    eci   = 3.3x10-4 S D      S [MPa], D [dpa]
                              445 C, 0-120 MPa, 0-3 dpa    [17]

Volume swelling rate (%)
    Delta-V/Vo = 1.9 (D/Dm)3 exp[(3 (1 - D/Dm)] (see Fig. 8)
                                      D [dpa], and Dm = 55 dpa
                                      0-85 dpa, 420-600 C  [22]

References