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Steel Making

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

Silicon prevents, to a large extent, defects such as gas bubb...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

Manganese adds considerably to the tensile strength of steel,...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Steel is hardened by quenching from above the upper critical....

Alloying Elements
Commercial steels of even the simplest types are therefore p...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

Uses Of The Various Tempers Of Carbon Tool Steel


DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pressing
and drop forgings. Mining drills to harden only. Easily weldable.

SMITHS' TOOL TEMPER.--No. 3-1/2: Large punches, minting and rivet
dies, nailmakers' tools, hammers, hot and cold sets, snaps and
boilermakers' tools, various smiths' tools, large shear blades,
double-handed chisels, caulking tools, heading dies, masons' tools
and tools for general welding purposes.

SHEAR BLADE TEMPER.--No. 4: Punches, large taps, screwing dies,
shear blades, table cutlery, circular and long saws, heading dies.

GENERAL PURPOSE TEMPER.--No. 4-1/2: Taps, small punches, screwing
dies, sawwebs, needles, etc., and for all general purposes. Weldable.

AXE TEMPER.--No. 5: Axes, chisels, small taps, miners' drills and
jumpers to harden and temper, plane irons. Weldable with care.

CUTLERY TEMPER.--No. 5-1/2: Large milling cutters, reamers, pocket
cutlery, wood tools, short saws, granite drills, paper and tobacco
knives. Weldable with very great care.

TOOL TEMPER.--No. 6: Turning, planing, slotting, and shaping tools,
twist drills, mill picks, scythes, circular cutters, engravers'
tools, surgical cutlery, circular saws for cutting metals, bevel
and other sections for turret lathes. Not weldable.

HARD TOOL TEMPER.--No. 6-1/2: Small twist drills, razors, small
and intricate engravers' tools, surgical instruments, knives. Not

RAZOR TEMPER.--No. 7: Razors, barrel boring bits, special lathe
tools for turning chilled rolls. Not weldable.

Next: Steel For Chisels And Punches

Previous: Carbon Steels For Different Tools

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