Recommended Temperature Ranges for Use*		Grade=
ºF	ºC
-450º to -250º	-272º to -157º	Inco 718 A286
-300º to -100º	-184º to -73º	Austenitic stainless steels
-100º to -30º	-73º to -34º	AISI 4340 AISI 8740
-30º to 32º	-34º to 0º	AISI 4037 AISI 4140
32º to 450º	0º to 232º	Medium carbon steels Low alloy steels
450º to 900º	232º to 482º	Stainless steels Chromium-molybdenum alloy steels (AISI 4100, 8600, 8700 series) ASTM A193 B16 H11
900º to 1200º	482º to 650º	A286 Inco 718 Many super alloys
Above 1200º	Above 650º	A refractory alloy

⁼Note: These are the most commonly used fastener alloys; many others are available that
will meet very specialized applications. The alloy selected for a fastener application must
not only maintain strength, etc., at the temperatures it will be heated to, it must also
resist the environment in which it is used. Thus, corrosion resistance of the metal selected
must be considered.

*(taken from IFI Fastener Standards, 6th Edition and ASM Metals Handbook, Vol. 1, 10th Edition)