ASTM A320 Grade L7M

This ASTM A320 grade L7M segment includes details of fasteners made from stainless and alloy steel. These fasteners are primarily used in various low-temperature applications in the form of forged, hardened, rolled bars, bolts, screws, and studs.

Below we have mentioned the grades that fall under A320

A320 Grade L7M

L7M Chromium, Molybdenum, Alloy Steel Quenched and tempered

Mechanical properties

Grade Size Tensile ksi, min Yield ksi, min Elong %, min RA % min HBW Rockwell
L7M Up to 2-1/2 100 105 16 50 321 Max 35 max

Chemical properties

Element L7M
Carbon 0.38 - 0.48%
Manganese 0.75 - 1.00%
Phosphorus, max 0.035%
Sulfur, max 0.040%
Silicon 0.15 - 0.35%
Chromium 0.80 - 1.10%
Nickel -
Molybdenum 0.15 - 0.25%

Related hardware

Bolt Grade Nut Washers
L7M A194 Grade 7M F436