Heat Treatment Status of 23 Commonly Used Valve Stems

1. GB1220 12Cr13 (quenching + high temperature tempering)

2. ASTM A182 F6a II (normalizing + high temperature tempering)

3. ASTM A182 F6a II (normalizing + secondary tempering ≤ 22HRC)

4. ASTM A182 F316, F304, F316L, F304L, F321, F317, F37 and other solid solutions

5. ASTM A182 F51 (solid solution treatment)

6. ASTM A182 F53 (solid solution treatment)

7. 25Cr2MoIVA (normalizing + high temperature tempering)

8. 20Cr1Mo1V1A (normalizing + high temperature tempering)

9. AISI 4140 (quenching + tempering)

10. ASTM A182 F11 (normalizing + high temperature tempering)

11. GB1220 2Cr13 (quenching + high temperature tempering)

12. ASTM A182 F5 (normalizing + tempering)

13. ASTM A182 F44 (solid solution)

14. ASTM A182 F53 (solid solution)

15. ASTM A182 F55 (solid solution)

16. ASTM B649 N08904 (904L) (solid solution)

17. ASTM A182 FXM-19 (solid solution)

18. ASTM B654 UNS (INCONEL 625), (INCONEL 600) (annealing)

19. ASTM B637 UNS N07718 (INCONEL 718) (solid solution + precipitation hardening)

20. ASTM B564 UNS (INCOLOY 800), (INCOLOY 825) (annealing)

21. ASTM A638 660 (solid solution + precipitation hardening)

22. ASTM B865 UNS N05500 (MONEL K-500) (solid solution treatment + aging treatment)

23. QAL9-4 (annealing)