Hot-stamp formed body

A hot-stamp formed body comprising, as a chemical composition, by mass %:

• C:
• 0.42% to 0.70%;
• Si:
• 0.010% to 1.300%;
• Mn:
• 0.100 to 3.000%;
• P:
• 0.100% or less;
• S:
• 0.0100% or less;
• N:
• 0.0200% or less;
• O:
• 0.0200% or less;
• Al:
• 0.001% to 0.500%;
• Cr:
• 0.010% to 0.800%;
• Ti:
• 0.010% to 0.100%;
• Nb:
• 0.0010% to 0.1000%;
• B:
• 0.0005% to 0.0200%;
• Mo:
• 0% to 1.000%;
• Co:
• 0% to 4.00%;
• Ni:
• 0% to 3.00%;
• Cu:
• 0% to 3.00%;
• V:
• 0% to 1.00%;
• W:
• 0% to 1.00%;
• Ca:
• 0% to 1.0000%;
• Mg:
• 0% to 1.0000%;
• REM:
• 0% to 1.0000%;
• Sb:
• 0% to 1.00%;
• Zr:
• 0% to 1.00%;
• Sn:
• 0% to 1.00%;
• As:
• 0% to 1.0000%;
• and
• a remainder:
• Fe and impurities,
• wherein the hot-stamp formed body has a microstructure including, by area ratio, martensite:
• 90% to 100% and a remainder in the microstructure:
• 0% to 10%,
• a percentage of martensite having a GAIQ value of 40000 or less in all of the martensite is less than 5.0%,
• an average grain size of prior austenite grains is 6.0 μm or less, and
• a standard deviation of grain sizes of the prior austenite grains is 2.6 μm or less.