Soft steel

Related to Soft steel: Medium carbon steel
1.Steel low in carbon; mild steel; ingot iron.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Notice the peening and wear on the old pins due to soft steel.
The most common metals used for jackets are gilding metal (i.e., copper alloy) or copper-plated soft steel. A lead core is most often pressed into the jacket.
However, 8620 is a very soft steel and most golfers will not be able to tell if they're playing a forging or not, making this a nonissue.
The bottom, however, is made from uncoated, relatively soft steel. On the hardness scale developed by mineralogist Friedrich Mohs, sinter dust is in the same category as diamond.
The .303, called the "needle nose," weighed 215 grains, was clad in soft steel, and came to a needle point ahead of a long sloping ogive.
The soft steel of the interrupted thread bolt head allowed the left rear thread to bend when struck hard against the bolt stop.
Spartan's website says that Foster "literally built the Spartan from the ground up starting with soft steel belted radial tires.
In my opinion, the experiment needs to be performed with apparatus that reduce the effects of EM-induced interference to a minimum, achieved by a symmetrical arrangement of the diode array around the sensing resistor, as well as a soft steel enclosure to ensure magnetic and electrical shielding.
And, to keep on the side of safe, I would recommend soft lead or a mixture of 50% soft lead and 50% wheel weights to keep from shooting an alloy that may be too hard, and therefore causing too high a pressure, in an old firearm made with soft steel barrels.
In that era, plowshares were made of either soft steel or hardened steel.