| T |
TANDEM MILL
Arrangement of rolling mills, in direct line, allowing the metal to pass from one set of rolls into the next. |
TAPPING
Transferring molten metal from melting furnace to ladle. |
TARNISH
Surface discoloration on a metal, usually from a thin film of oxide or sulfide. |
TEEMING
Pouring metal into ingot molds. |
TELESCOPING
Transverse slipping of successive layers of a coil so that the edge of the coil is conical rather than flat. |
TEMPER
| ALUMINUM SHEET - Refer to Aluminum Designates - Aluminum Section this catalog. |
| COPPER BASE ALLOYS - (Cold Rolled) - B & S Gage Numbers |
| NOTE - Hardness is indicated condition whiles hardness varies with alloy changes. |
| |
|
| Temper |
Hardness |
| |
|
| Annealed |
Commercially Soft |
| Hard |
Two Numbers Hard Hard |
| Temper |
Four Numbers Hard Extra |
| Hard |
Six Numbers Hard Spring |
| Temper |
Eight Numbers Hard Extra Spring |
| Temper |
Ten Numbers Herd |
| |
|
|
| SHEET STEEL (Low Carbon Cold Rolled) - Temper Classifications |
| |
|
| Temper |
Rockwell |
| 070 and thinner B 84 min. |
Full |
| Hard |
{.069 and thinner B 90 min. |
| Half Hard |
Approx. R/B 70/85 Quarter |
| Hard |
Approx. R/B 60/75 Soft Commercial |
| |
Approx. R/B 55 max. |
| |
|
| STAINLESS STRIP STEEL (Cold Polled Temper Classification) - Type 301. |
|
NOTE - The various stainless strip tempers are based on specified minimum values
for tensile strength or yield strength or both. Here at Precision Steel there is on file a
complete record of all such detail including chemical analysis on each item in stock.
However, because of custom, both distributors and customers alike rely on
approximate Rockwell readings for temper classification. To illustrate:
| Temper (Type 301) |
Rockwell |
Tensile Psi |
| |
|
|
| Soft |
Approx. B 75/85 |
110,000 Min. |
| Quarter Hard |
Approx C 25/30 |
125,000 Min. |
| Half Hard |
Approx C 30/35 |
150,000 Min. |
| Three Quarters Hard |
Approx C 35/40 |
175.000 Min. |
| Full Hard |
Approx C 40/45 |
185,000 Min. |
| Extra Hard (Type 301) |
Approx C 45 min |
200,000 Min. |
| Type 430 Soft |
Approx B 75/85 |
75/85,000 Min. |
|
SHEET STEEL (Low Carbon Cold Rolled) - Temper Classifications.
| Temper |
Rockwell |
Means Tensile |
| |
070 and thicker B 84 min |
80,000 |
| No. Full Hard |
{.069 and thinner B 90 min |
80,000 |
| No.3 Full Hard |
B.70/85 |
64,000 |
| No.3 Half Hard |
B 60/75 |
54,000 |
| No.4 Skin Rolled |
B 65
max |
48,000 |
| No.5 Dead
Soft |
B 55 max |
|
| |
|
|
| |
| TEMPERED SPRING STEELS (Strip) - Temper indication is to Rockwell Hardness only. |
|
TIN MILL PRODUCTS (Steel) - Temper Classifications - NOT STANDARDIZED.
FOR INFORMATION ONLY (Not to be confused with the Cold Rolled Strip Steel Temper Numbering System wherein No. 1 Temper indicates Full Hard, while in the TIN MILL Product Numbering System No. 1 Temper indicates a soft condition.) The
following Rockwell ranges are approx. only.
| Temper Number |
Rockwell - 30 T Scale |
Rockwell B Scale |
| |
|
|
| No.1 Temper |
Aim at 46/52 |
Aim at 45/53 |
| No.2 Temper |
Aim at 50/56 |
Aim at 51/59 |
| No. 2½ Temper |
Aim at 52/58 |
Aim at 53/62 |
| No. 3 Temper |
Aim at 54/60 |
Aim at 56/66 |
| No. 4 Temper |
Aim at 58-64 |
Aim at 62/71 |
| *No. 5 Temper |
Aim at 62/68 |
Aim at 68/77 |
| *No. 6 Temper |
Aim at 62/73 |
Aim at 75/84 |
*NOTE: Tempers 5 and 6 are temper rolled from rephosphorized steel in order to
develop desired hardness and stiffness.
The above temper classifications are used principally by producing mills and can
manufacture but are not in general use in the sheet and strip industry.
|
|
TEMPER ROLLING
Subjecting metal sheet or strip to a slight amount of cold rolling following annealing (usually ? to 1? %) to forestall stretcher strains. Also termed "Pinch Pass" or "Skin Rolled." Also See Cold Rolling. |
TEMPERED and POLISHED SPRING STEEL STRIP
90/1.03 carbon range (Also known as clock spring steel.) - This product, while similar to general description under heading of Tempered Spring Steel Strip, is manufactured and processed with great and extreme care exercised in each step of its production. Manufactured from carbon range of 90/1.03 with Rockwell range C 48/51. Clock spring quality has been ground and polished with edges dressed. It is usually supplied dark blue in color and has a wide range of uses, such as coiled and flat mechanical springs, ignition vibrator springs, springs for timing devices, springs for the electric and electronic fields, steel tapes, rules, etc. |
TEMPERED SPRING STEEL STRIP
Any medium or high carbon (excluding clock spring) strip steel of spring quality which has been hardened and tempered to meet specifications. Where specification calls for blue or straw color, same is accomplished by passing through heat prepared at proper temperature depending on color required. Blue is developed at approximately 600?F. |
TEMPERING
(Also termed "drawing.") - A process of reheating quench-hardened or normalized steel to a temperature below the transformation range and then cooling at any rate desired. The primary purpose of tempering is to impart a degree of plasticity or toughness to the steel to alleviate the brittleness of its martensite. |
