Iron content is the main factor in deciding magnetic attractiveness in steel. The higher the iron content the more magnetic the steel.

Stainless Steels
403
405
409
410
410S
410HT
416
416HT
420
422
430
440C

Alloy Steels
A27
A148
A352
A757
A216
A217
A389

Plain carbon steel
1010
1015
1018
1020
1022
1029
1030
1035
1040
1045
1070

Martensitic Chromium Steel
614
615
616
617
618
619

Martensitic low-alloy steels
601
602
603
604