| ex. 42CrMo4+QT = Quenched and Tempered -- UNI 10440/00 - EN 10027-1/05 -- |
| |
|
|
| symbol |
other |
definition |
| +A |
TC |
Soft annealing |
| +AC |
|
Spherodized annealed |
| +AR |
|
Raw for rolling, natural state |
| +AT |
|
Solubilization annealing |
| +BC |
|
Hot formed and sandblasted |
| +BG |
|
Spheroid annealing (not laminar) |
| +BK |
|
Bright Down, no heat treatment after drawing |
| +C |
|
Cold-drawn |
| +CC |
|
Semi-finished from continuous casting not subject to subsequent forming |
| +Cnnn |
|
Cold-drawn to obtain nnn N/mm2 |
| +CH |
|
Core Hardenability |
| +CR |
|
Cold rolled |
| +DC |
|
Condition of supply selected by supplier |
| +FP |
|
Treated for ferrite-pearlite structure and hardness |
| +GBK |
|
Annealed in protected atmosphere (ex. bright annealing) |
| +GKZ |
|
Spheroid annealing (not laminar) |
| +H |
|
Normal hardenability at maximum range |
| +HH |
|
Hardenability restricted towards top |
| +HL |
|
Hardenability restricted towards bottom |
| +HC |
|
Hot rolled and cold drawn |
| +HR |
|
Treated for a certain range of hardness |
| +HW |
|
Normal state of hot forming |
| +I |
|
Isothermal annealing |
| +LC |
|
Skin pass (flattened or cold drawn) |
| +M |
|
Thermo-mechanically rolled |
| +MA |
|
Machined |
| +N |
TD |
Normalized |
| +NBK |
|
Normalized in a controlled atmosphere |
| +NT |
|
Normalized and Tempered |
| +P |
|
Hardened by precipitation |
| +PE |
|
Peeled |
| +PI |
|
Hot formed and pickled |
| +PL |
|
Polished (smoothed) |
| +Q |
|
Quenched |
| +QA |
|
Quenched in air |
| +QO |
|
Quenched in oil |
| +QT |
TF |
Quenched and Tempered |
| +QW |
|
Quenched in water |
| +RA |
|
Recrystallization annealing |
| +S |
|
Annealed for cold shearing |
| +SH |
|
Peeled reeled |
| +SL |
|
Ground |
| +SR |
|
Stress relieved |
| +T |
|
Tempered |
| +TH |
|
Tempered to obtain a range of hardness |
| +U |
|
Untreared ex. St 52.3 U |
| +WW |
|
Hot forming |
| +V |
|
(Vergüten) Hardening and tempering |
| +Z15 |
|
Through tickness property, minimum reduction of area = 15% |
| +Z25 |
|
Through tickness property, minimum reduction of area = 25% |
| +Z35 |
|
Through tickness property, minimum reduction of area = 35% |
| J2 |
|
Guaranteed impact strength at –20°C > 27J (cold-drawn excluded) |
| J0 |
|
Guaranteed impact strength at 0°C > 27J (cold-drawn excluded) |
| JR |
|
On request, guar. imp. strength at +20°C > 27J (cold-drawn excluded) |
| K2 |
|
Guaranteed impact strength at –20°C > 40J (cold-drawn excluded) |
| L |
|
Guaranteed impact strength at –50°C > 27J (cold-drawn excluded) |
| G1 |
|
Rimming steel allowed |
| G2 |
|
Rimming steel not allowed |
| G3 |
|
Fully killed steel |
| FU |
|
Rimming steel allowed |
| FN |
|
Rimming steel not allowed |
| FF |
|
Fully killed steel |
| G4 |
|
State of supply at producer's discretion |
| ….E |
|
ex. C45E with max sulphur content specified |
| ….R |
|
ex. C45R with a range of sulphur content specified |
| R…. |
|
ex. RSt 52.3 killed steel |
| RR…. |
|
ex. RRSt44-3 special killed steel |
| U…. |
|
ex. USt 52.3 rimming steel |
| X…. |
|
ex. X 6Cr17 indicates steels with at least one alloy of more than 5% |
| BS |
|
Base steels |
| QS |
|
High quality steels |
| H |
|
Cable profile |
| KG |
|
Use at ambient temperature |
| N |
|
Use at ambient temperature |
| KT |
|
Use to low temperatures |
| NL |
|
Use to low temperatures |
| KW |
|
Use at high temperatures |
| NH |
|
Use at high temperatures |
| R |
|
Room temperature |
| GC |
|
Suitable for cold drawing |
| +A |
coating |
Hot dip aluminium coating |
| +AS |
|
Aluminium-silicon alloy coating |
| +AZ |
|
Aluminium-zinc alloy coating (>50% Al) |
| +CE |
|
Electrolytic chromium/chromium oxide coating ECCS |
| +CU |
|
Copper coating |
| +IC |
|
Inorganic coating |
| +OC |
|
Organic coating |
| +S |
coating |
Hot dip tin coating |
| +SE |
|
Electrolytic tin coating |
| +T |
coating |
Hot dip lead-tin alloy ( |
| +TE |
|
Electrolytic lead-tin alloy (terne) coating |
| +Z |
|
Hot dip zinc (galvanized) coating |
| +ZA |
|
Hot dip zinc-aluminium coating (>50%Zn) |
| +ZE |
|
Electrolytic zinc coating |
| +ZF |
|
Hot dip zinc-iron (galvannealed) coating |
| +ZN |
|
Electrolytic zinc-nickel coating |
| m |
|
ex. Cm 55 with a range of sulphur content 0.020-0.040% |
| ….K |
|
ex. St 37-3 K = kaltgezogen, cold-drawn, drawn ex. CK 15 = Fully Killed |
| ….K |
|
ex. C15K = cold-drawn |
| P |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 550-700 |
| Q |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 625-775 |
| R |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 700-850 |
| S |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 775-925 |
| T |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 850-1000 |
| U |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 925-1075 |
| V |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 1000-1150 |
| W |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 1075-1225 |
| X |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 1150-1300 |
| Y |
BS 970 pt. 1 1991 |
Tensile strength N/mm² 1225-1375 |
| Z |
BS 970 pt. 1 1991 |
Tensile strength N/mm² =1550 |
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