CH20 ASTM A743&A743M (CENT, INVEST, SAND)
Grade（UNS）：CH20 (J93402)
Type：25Chromium, 12 Nickel
CH20 Chemical Requirements:
C(max):0.20
Men(max)：1.5
Si(max)：2.00
P(max):0.04
S(max):0.04
Cr:22.0~26.0
Ni:12.0~15.0
Heat Treatment Requirements:
Heat to 2000°F [1093°C] minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid
cool by other means
Tensile Requirements:
Tensile Strength, min
Tensile, ksi: 70
Tensile, MPa:485
Yield Strength, min
Yield, ksi:30
Yield, MPa:205
Elongation in 2 in. [50 mm] min, %A: 30
Keywords: corrosion resistant; iron-chromium; iron-chromium nickel; steel castings