CF20 ASTM A743&A743M（cent，invent，sand）
Grade（UNS）：CF20（J92602）
Type：19 Chromium, 9 Nickel
CF20 Chemical Requirements:
C(max):0.20
Men(max)：1.5
Si(max)：2.00
P(max):0.04
S(max):0.04
Cr:18.0~21.0
Ni:8.0~11.0
Heat Treatment Requirements:
Heat to 1900°F [1040°C] minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid cool by other means
metallographic structure： Austenitic stainless steel
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
