From July-Aug 1928 issue Army Ordnance, “Heat Treatment and Finish of Small Arms at Springfield Armory”
Carbon Manganese Max Phos Max Sulpher Nickel Component Use
Manganese Steel WD1325 .20-.30 1.0-1.30 .050 .050 Receivers And Bolts
Nickel Steel W.D. 2340 .35-.45 .50-.80 .04 .050 3.25-3.75 Receivers And Bolts
Manganese Steel W.D. 1350 .45-.55 1.00-1.30 .050 .050 Barrels
From Instructions to Bidders, and Specifications Governing the Manufacture and Inspection of the United States Rifle, Caliber .30, Model of 1903 1 July 1916
The physical qualities required in the annealed (not heat treated!) state are as follows:
Tensile Strength
Lbs per square inch Elastic limit
lbs per square inch Elongation
Per cent Contraction of area
Per cent Component
Use
Class A
(later called
WD 1350) 110,000 75,000 20 45 Barrels
Class C
(later called
WD 1325) 75,000 50,000 25 50 Receivers
And Bolts
From Book “Manufacture of the Model 1903 Springfield Service Rifle, Wolfe Publishing Co. Inc, 1984
Receivers and bolts of SA, serial number 1 to 800,000*
Material, Class C Steel
Treatment: Carburize in bone at 1500 F for 4 hours, then quench in oil
Source: Hatcher’s Notebook, Stackpole Books.
Receivers and bolts of SA, serial number 800,000 to 1,275,767
Material, Class C steel
Treatment: Carburize in bone at 1450 F for 2.5 hours, then quench in oil
Reheat at 1300 F in a salt bath for 5 minutes and quench in oil
Draw at 350 F in an oil bath, and air cool.
Hardness Rockwell C33 to C44
Source: July-Aug 1928 issue Army Ordnance, “Heat Treatment and Finish of Small Arms at Springfield Armory
Receivers and bolts of SA, serial number 1,275,767
Material WD 2340
Treatment: Heat to 1425-1450 for five minutes in a salt bath, oil quench
Temper at 700 F for one-half hour and air cool
Hardness Rockwell C-40 to C-50.
Source: July-Aug 1928 issue Army Ordnance, “Heat Treatment and Finish of Small Arms at Springfield Armory
Receivers and bolts of SA, serial number 1,275,767
Material WD 2340
Treatment: Heat to 1425-1450 for five minutes in a salt bath, oil quench
Temper at 700 F for one-half hour and air cool
Hardness Rockwell C-40 to