| ISO |
VDI |
Description |
Condition |
Hardness |
Strength |
Optimal |
| P | 1 | Steel - Non-alloy, cast & free cutting (~ 0.15 %C) | Annealed | 125HB | 440MPa | |
|---|
| P | 2 | Steel - Non-alloy, cast & free cutting (~ 0.45 %C) | Annealed | 190HB | 640MPa | |
|---|
| P | 3 | Steel - Non-alloy, cast & free cutting (~ 0.45 %C) | Quenched & Tempered | 250MPa | 840MPa | |
|---|
| P | 4 | Steel - Non-alloy, cast & free cutting (~ 0.75 %C) | Annealed | 270MPa | 910MPa | |
|---|
| P | 5 | Steel - Non-alloy, cast & free cutting (~ 0.75 %C) | Quenched & Tempered | 300MPa | 1010MPa | |
|---|
| P | 6 | Steel - Low alloy & cast < 5% of alloying elements | Annealed | 180HB | 610MPa | |
|---|
| P | 7 | Steel - Low alloy & cast < 5% of alloying elements | Quenched & Tempered | 275MPa | 930MPa | |
|---|
| P | 8 | Steel - Low alloy & cast < 5% of alloying elements | Quenched & Tempered | 300MPa | 1010MPa | |
|---|
| P | 9 | Steel - Low alloy & cast < 5% of alloying elements | Quenched & Tempered | 350MPa | 1180MPa | |
|---|
| P | 10 | Steel - High alloy, cast & tool | Annealed | 200MPa | 680MPa | |
|---|
| P | 11 | Steel - High alloy, cast & tool | Hardened & Tempered | 325MPa | 1100MPa | |
|---|
| P | 12 | Steel - Corrosion resistant & cast - Ferritic / Martensitic | Annealed | 200MPa | 680MPa | |
|---|
| P | 13 | Steel - Corrosion resistant & cast - Martensitic | Quenched & Tempered | 240MPa | 810MPa | |
|---|
| M | 14.1 | Stainless Steel - Austenitic | Age Hardened | 180MPa | 610MPa | |
|---|
| M | 14.2 | Stainless Steel - Duplex | | 250MPa | 840MPa | |
|---|
| M | 14.3 | Stainless Steel - Precipitation Hardening | | 250MPa | 840MPa | |
|---|
| K | 15 | Cast Iron, Grey (GG) - Ferritic / Pearlitic | | 180MPa | 610MPa | |
|---|
| K | 16 | Cast Iron, Grey (GG) - Pearlitic | | 260MPa | 880MPa | |
|---|
| K | 17 | Cast Iron, Nodular (GGG) - Ferritic | | 160MPa | 570MPa | |
|---|
| K | 18 | Cast Iron, Nodular (GGG) - Pearlitic | | 250MPa | 840MPa | |
|---|
| K | 19 | Cast Iron, Malleable - Ferritic | | 130MPa | 460MPa | |
|---|
| K | 20 | Cast Iron, Malleable - Pearlitic | | 230MPa | 780MPa | |
|---|
| N | 21 | Aluminum & Magnesium, wrought alloy - Non Heat Treatable | | 60HB | 210MPa | |
|---|
| N | 22 | Aluminum & Magnesium, wrought alloy - Heat Treatable | Age Hardened | 100HB | 360MPa | |
|---|
| N | 23 | Aluminum & Magnesium, cast alloy ≤12% Si - Non Heat Treatabl | | 75HB | 270MPa | |
|---|
| N | 24 | Aluminum & Magnesium, cast alloy ≤12% Si - Heat Treatable | Age Hardened | 90HB | 320MPa | |
|---|
| N | 25 | Aluminum & Magnesium, cast alloy >12% Si - Non Heat Treatabl | | 130HB | 460MPa | |
|---|
| N | 26 | Copper & Copper alloys (Brass/Bronze) - Free cutting, Pb > 1 | | 110HB | 390MPa | |
|---|
| N | 27 | Copper & Copper alloys (Brass/Bronze) - Brass (CuZn, CuSnZn) | | 90HB | 320MPa | |
|---|
| N | 28 | Copper & Copper alloys (Brass/Bronze) - Bronze (CuSn) | | 100HB | 360MPa | |
|---|
| N | 29 | Non-metallic - Thermosetting & fiber-reinforced plastics | | | | |
|---|
| N | 30 | Non-metallic - Hard rubber, wood etc. | | | | |
|---|
| S | 31 | High temperature alloys - Fe based | Annealed | 200HB | 680MPa | |
|---|
| S | 32 | High temperature alloys - Fe based | Age Hardened | 280HB | 950MPa | |
|---|
| S | 33 | High temperature alloys - Ni / Co based | Annealed | 250HB | 840MPa | |
|---|
| S | 34 | High temperature alloys - Ni / Co based | Age Hardened | 350HB | 1180MPa | |
|---|
| S | 35 | High temperature alloys - Ni / Co based | Cast | 320HB | 1080MPa | |
|---|
| S | 36 | Titanium & Titanium alloys - CP Titanium | | | 400MPa | |
|---|
| S | 37.1 | Titanium & Titanium alloys - Alpha alloys | | | 860MPa | |
|---|
| S | 37.2 | Titanium & Titanium alloys - Alpha / Beta alloys | Annealed | | 960MPa | |
|---|
| S | 37.3 | Titanium & Titanium alloys - Alpha / Beta alloys | Age Hardened | | 1170MPa | |
|---|
| S | 37.4 | Titanium & Titanium alloys - Beta alloys | Annealed | | 830MPa | |
|---|
| S | 37.5 | Titanium & Titanium alloys - Beta alloys | Age Hardened | | 1400MPa | |
|---|
| H | 38.1 | Hardened steel | Hardened & Tempered | 45HRC | | |
|---|
| H | 38.2 | Hardened steel | Hardened & Tempered | 55HRC | | |
|---|
| H | 39.1 | Hardened steel | Hardened & Tempered | 58HRC | | |
|---|
| H | 39.2 | Hardened steel | Hardened & Tempered | 62HRC | | |
|---|
| H | 40 | Cast Iron - Chilled | Cast | 400MPa | 1350MPa | |
|---|
| H | 41 | Cast Iron | Hardened & Tempered | 55HRC | | |
|---|
/JPEG+72dpi/T654_Gun_DIN374_NH_Ox_thumbnail.jpg "Spiral Point (Gun) Taps - NH Hero")
/JPEG+72dpi/T654_Drawing_thumbnail.jpg "Spiral Point (Gun) Taps - NH Line Drawing")
