ASTM B638 S66220 Stockist, ASTM B638 S66220 Equivalent Steel
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ASTM B638 S66220
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Standard specification for Precipitation hardening iron-base superalloy bar, B638 S66220 forgings, and forging stock for high-temperature service ASTM B638 S66220 data sheet, ASTM B638 S66220 Chemical compositions, mechanical properties from Steel making, ESR melted, Blooming, Forging, Hot rolling, Heat treatment, Straightening, Ultrasonic test, Cold working or Machined. All of these materials conform to Military standard, nuclear power. Technical specification ASTM B638 - 2010
MATERIAL TECHNICAL STANDARDS - ASTM B638 GRADE UNS S66220

TECHNICAL SPECIFICATION: ASTM B638 - 2010
OFFICIAL TEST CERTIFICATE: issued by
TUV - SGSBV

MATERIAL CATEGORY:  Precipitation hardening iron base superalloy
CHEMICAL COMPOSITION (WEIGHT %)
C (%):     ≤ 0.08
Si (%):     ≤ 1.00
Mn (%):   ≤ 1.50
P (%) ≤:  0.040
S (%) ≤:  0.030
Cr (%):    12.0 ~ 15.0
Ni (%):     24.0 ~ 28.0
Mo (%):   2.50 ~ 3.50
Ti (%):     1.55 ~ 2.00
Cu (%):    ≤ 0.50
Al (%):     ≤ 0.35
V (%):      -
B (%):      0.0010 ~ 0.010
Fe (%):     Remainder
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Form: bar, forge piece
Condition: solution treated, at 955 ~ 1040 Deg min.,  hold 1h, oil or water quench
                precipitation hardening 675 ~ 760 Deg. hold 5h min. to 650 +/-10 Deg., hold 20h min., air cooling or furnace cooling
Tensile strength,σb/≥ MPa: 895
Yield strength, σ0.2/≥ MPa: 585
Elongation, δ ≥(%): 15.0
Reduction of area, ф ≥ (%): 18.0
Hardness | HBW: 248 min.

FORMS AND SHAPES
Round bar (Diameter): 0.50mm to 500mm
Square bar / Flat bar: 3mm to 500mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.

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