Technical

Grade

Minimum Ultimate Tensile Strength

General Use

Carbon steels

100,000 psi to 175,000 psi

Often used for nuts

Alloy steels

100,000 psi to 180,000 psi

Used for bolts and screws

Tool steel (H-11)

Up to 260,000 psi

High strength fasteners

Austenitic stainless steels (300 series)

75,000 psi (carbide solution treated)

100,000 psi to 125,000 psi (strain hard)

Corrosion resistant fasteners

Martensitic stainless steels

(400 series)

90,000 psi to 140,000 psi

Less corrosion resistance than 300 series

Precipitation hardenable (PH) stainless steels

(17-4PH, A286)

80,000 psi to 180,000 psi

Corrosion resistance similar to 300 series stainless

PH Nickel based alloys

(Inconel 718, Inconel X750, Waspaloy)

140,000 psi to 180,000 psi
225,000 psi (hardened)

Superior corrosion resistance, elevated temperature strength

Non-HT Nickel based alloys

(Alloy 20, Inconel 600, Inconel 625, Inconel 686)

80,000 psi to 120,000 psi (annealed)

Up to 180,000 psi (strain hardened)

Corrosion resistance in severe environments

Nickel-Copper alloy

(Monel 400)

80,000 psi

Corrosion resistance in a variety of environments including seawater

Nickel-Copper-Aluminum alloy

(K-500)

160,000 psi

Corrosion resistance in a variety of environments including seawater

Cobalt based alloys

(MP35N, MP159)

Up to 260,000 psi

Superior corrosion resistance

Titanium alloys

(commercially pure;

alpha-beta alloys)

35,000 psi to 80,000 psi (annealed)

140,000 psi to 190,000 psi (hardened)

Light weight, excellent corrosion resistance

Copper based alloys

30,000 psi to 70,000 psi

Electrical conductivity, heat transfer, corrosion resistance

Bolt nuts

Bolt nuts

Bolt nuts
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