AISI 422, SUH 616, B50A951, 1.4935, X20CrMoWV12-1

Type 422 Mechanical properties acc. to GE B50A951

• Type 422 Class A1, A2, A4
• Tensile strength KSI(MPa): Min 140(965)
• Yield Strength 0.02%, Offset KSI(MPa): Min 90(620) *
• Elong. In 2": Min 13 %
• RA: Min 35%
• Brinell Hardness, 3000Kg laod: 285-331
• Kv, Min at  R.T.  ft-lb(J): 10(13.36)
• Type 422 Class A3
• Tensile strength KSI(MPa): Min 110(759)
• Yield Strength 0.02%, Offset KSI(MPa): Min 80(555) *
• Elong. In 2": Min 18 %
• RA: Min 50%
• Brinell Hardness, 3000Kg laod: 223-269
• Kv, Min at  R.T.  ft-lb(J): 25(33.90)

Tensile Requirements (B50A249B Only)

• Tensile Strength, psi, min. 140,000
• Yield Strength, psi, 0.02%, min. 90,000
• Elongation, % in 2 inches, min. 12
• Reduction of Area, %, min. 25
• Charpy V-Notch Impact Energy Requirements (B50A249B Only)

Two Charpy V-Notch Impact energy tests shall be conducted at room temperature (70F +/-10F) and have following properties:

Standard Charpy V-Notch Impact, ft-lb, min. 10

• Hardness Requirements

Two Brinell Hardness measurements shall be taken at the 0-degree and 180 Degree locations on one end and at the 90-degree and 270-degree locations on the opposite end of each forging. The measurements shall be taken at each end, on either the end face or a radial face in close proximity to the end. All measurements must meet the following requirements:

Brinell Hardness Number, 3000 kg load 290-332

Stress Rupture Requirements (B50A249B Only)

Smooth bar stress rupture tests shall be conducted on each forging or each heat treated forging length. The test may be discontinued after the minimum requirement for time to rupture has been exceeded. The test must meet the following requirements:

• Temperature (Degree F): 1200
• Stress (psi): 26,000
• Min. Time to Rupture (hrs.): 25

1.4935 Mechanical properties acc. to EN 10302

• +QT700
• Tensile strength KSI(MPa): 700 to 850
• Yield Strength 0.02%, Offset KSI(MPa): Min 500
• A5 15%
• +QT800
• Tensile strength KSI(MPa): 800 to 950
• Yield Strength 0.02%, Offset KSI(MPa): Min 600
• A5 14%

Grade B4B Stress Rupture

• Test Method: ASTM E139
• Temperature: 650 °C
• Load:200 MPa
• Result: Life = 25 hours,Elongation and Reduction of Area = For information On bar having lowest hardness for each heat lot.

1.4935 QT700 Creep

Density: 7.7 g/cm3 

Linear expansion coefficient: 10.5-12.5 *10-6m/(m*K) 

Thermal conductivity: 24 W/(m*K) 

Specific heat capacity: 460 J/(kg*K) 

Young's modulus: 216 GPa 

Electrical resistivity: 0.6 µΩ*m 

Tensile strength Rm: > 600 MPa 

Creep limit for max elongation 0.2% Rp0.2: Min 800 MPa 

Creep-rupture strength Ru: Min 275 MPa; 500°C; 100000h

1.4935 High Temperature acc. to EN 10302

• +QT700

  High Temperature

  • Temp 50 °C - > 465 MPa
  • Temp 100 °C - > 460 MPa
  • Temp 150 °C - > 445 MPa
  • Temp 200 °C - > 430 MPa
  • Temp 250 °C - > 415 MPa
  • Temp 300 °C - > 390 MPa
  • Temp 350 °C - > 380 MPa
  • Temp 400 °C - > 360 MPa
  • Temp 450 °C - > 330 MPa
  • Temp 500 °C - > 290 MPa
  • Temp 550 °C - > 250 MPa
• +QT800

  High Temperature

  • Temp 50 °C - > 585 MPa
  • Temp100 °C - > 560 MPa
  • Temp 150 °C - > 545 MPa
  • Temp 200 °C - > 530 MPa
  • Temp 250 °C - > 505 MPa
  • Temp 300 °C - > 480 MPa
  • Temp 350 °C - > 450 MPa
  • Temp 400 °C - > 420 MPa
  • Temp 450 °C - > 380 MPa
  • Temp 500 °C - > 335 MPa
  • Temp 550 °C - > 280 MPa