On many website, they list ASTM A995 Gr. 6A as an equivalent of Zeron or even as Zeron.
But when I check the chemical composition, it seems they are not exactly same.
ASTM A995 Gr. 6A
C-0.03%max,
Mn-1.0%max,
Si-1.0%.max,
S-0.025%max, (0.01% per Rolled Alloys Zeron 100)
P-0.030%max...