Alleima® 12R10 and Alleima® 12R10 HV (vacuum remelted) are austenitic stainless steels characterized by moderate tensile strength, good corrosion resistance and moderate fatigue and relaxation resistance.
Vacuum-remelted Alleima® 12R10 HV offers higher cleanliness compared to Alleima® 12R10, which is usually required for medical applications.
Service temperature: -200 to 250°C (-330 to 480°F).
Alleima® 12R10 and Alleima® 12R10 HV are characterized by:
- High tensile strength and tempering effect
- Good relaxation resistance, especially at elevated temperatures
- High fatigue strength
Standards
- ASTM: 302/302VM, '304V'
- ISO: X9 CrNi 18-8 Grade 1 NS
- EN Number: 1.4310 NS
- EN Name: X10CrNi18-8NS
- W.Nr.: 1.4310
- JIS: SUS 302/304-WPB
Product standards
| EN | 10270-3 |
| ISO | 6931-1 |
| ASTM | A 313/A 313M, F899 |
| JIS | G 4314 |
Applications
Alleima® 12R10/12R10HV can be used for blood lancets, stylets, acupuncture needles and dental files and reamers.
Chemical composition (nominal) %
| C | Si | Mn | P | S | Cr | Ni |
|---|---|---|---|---|---|---|
| 0.08 | 0.5 | 1.2 | ≤0.040 | ≤0.010 | 18 | 8.3 |
Forms of supply
| Surface finish | Size range, mm |
|---|---|
| Coated | 0.20 - 10.00 |
| Nicoat A (nickel coating) | 0.22 - 2.50 |
| Bright | 0.11 - 0.80 |
| Nicoat P (nickel coating + bright) | 0.11 - 0.80 |
| Mechanically polished Degreased |
0.40 - 6.00 0.50 - 5.00 |
Wire is delivered in in a number of different forms to meet customers' requirements:
- In coils with weights up to 150 kg
- On spools with wire weights up to 500 kg
- In straightened lengths up to 4 m, diameters between 0.6 to 10 mm
Mechanical properties
Mechanical properties in the 'as delivered' condition
Tensile strength and proof strength, MPa (ksi)
| Wire diameter | Nominal, Rm1 Nominal Rp0.2 | ||||
|---|---|---|---|---|---|
| mm | in. | MPa | ksi | MPa | ksi |
| 0.15 – 0.20 | 0.0059 - 0.0079 | 2365 | 343 | 1890 | 274 |
| >0.20 – 0.30 | >0.0079 - 0.012 | 2310 | 335 | 1850 | 268 |
| >0.30 – 0.40 | >0.012 - 0.016 | 2260 | 328 | 1810 | 262 |
| >0.40 – 0.50 | >0.016 - 0.020 | 2200 | 319 | 1760 | 255 |
| >0.50 – 0.65 | >0.020 - 0.026 | 2150 | 312 | 1720 | 249 |
| >0.65 – 0.80 | >0.026 - 0.031 | 2095 | 304 | 1680 | 244 |
| >0.80 – 1.00 | >0.031 - 0.039 | 2045 | 297 | 1635 | 237 |
| >1.00 – 1.25 | >0.039 - 0.049 | 1990 | 289 | 1590 | 231 |
| >1.25 – 1.50 | >0.049 - 0.059 | 1935 | 281 | 1550 | 225 |
| >1,50 – 1,75 | >0.059 - 0.069 | 1880 | 273 | 1505 | 218 |
| >1.75 – 2.00 | >0.069 - 0.079 | 1830 | 265 | 1465 | 212 |
| >2.00 – 2.50 | >0.079 - 0.098 | 1775 | 257 | 1420 | 206 |
| >2.50 – 3.00 | >0.098 - 0.118 | 1720 | 249 | 1375 | 199 |
| >3.00 – 3.50 | >0.118 - 0.138 | 1665 | 241 | 1330 | 193 |
| >3.50 – 4.25 | >0.138 - 0.167 | 1615 | 234 | 1290 | 187 |
| >4.25 – 5.00 | >0.167 - 0.197 | 1560 | 232 | 1250 | 181 |
| >5.00 – 6.00 | >0.197 - 0.236 | 1505 | 218 | 1205 | 175 |
| >6.00 – 7.00 | >0.236 - 0.276 | 1450 | 210 | 1160 | 168 |
| >7.00 – 8.50 | >0.276 - 0.335 | 1400 | 203 | 1120 | 162 |
| >8.50 – 10.00 | >0.335 - 0,394 | 1345 | 195 | 1075 | 156 |
1)tolerance on tensile strength + /- 7.0 % in accordance with EN 10 270-3 (ISO 6931-1).
Exera® 12R10 can be supplied in the annealed condition.
Tensile strength can be increased by 150–250 MPa (22 - 36 ksi) by tempering. Click on heat treatment for further information. The tensile strength variation between spools/coils within the same production lot is ±50 MPa (7 ksi) maximum.
Proof strength in the tempered condition is approx. 85% of the tempered tensile strength. Tensile strength values are guaranteed and are measured directly after production. During storage, the strength will increase slightly due to ageing. Depending on storage conditions, ageing can increase the strength by 0 - 50 MPa (0 - 7 ksi)
The strength will decrease by 3–4% per 100°C (184oF) increase in service temperature.
Straightened lengths
After straightening, the strength is approx. 7% lower.
Physical properties
Density: 7.9 g/cm3, 0.29 lb/in3
| 500 J/kg °C | in the temperature range 50 - 100°C |
| 0.12 Btu/lb °F | in the temperature range 120 - 210°F |
| Temperature, °C | W/m °C | Temperature, °F | Btu/ft h °F |
|---|---|---|---|
| 20 | 15 | 68 | 9 |
| 100 | 16 | 210 | 9 |
| 200 | 18 | 390 | 10.5 |
| 300 | 19 | 570 | 11.5 |
| Temperature, °C | μΩm | Temperature, °F | μΩin. |
|---|---|---|---|
| 20 | 0.80 | 68 | 31 |
| 100 | 0.85 | 200 | 33 |
| 200 | 0.90 | 400 | 36 |
| 300 | 0.95 | 600 | 38 |
| Temperature, °C | per °C | Temperature, °F | per °F |
|---|---|---|---|
| 20 - 100 | 17 | 68 - 210 | 9.5 |
| 20 - 200 | 17.5 | 68 - 390 | 9.5 |
| 20 - 300 | 18.5 | 68 - 570 | 10.0 |
1) mean values in temperature ranges ( x10-6)
Magnetic permeability, μmax: about 10
Shear modulus, MPa (ksi)
As delivered: approx 71 000 (10 295)
Tempered: approx 73 000 (10 585)
Modulus of elasticity, MPa (ksi)
As delivered: approx 185 000 (26 825)
Tempered: approx 190 000 (27 550)
Heat treatment
By tempering at 350°C (660°F)/0.5–3 h, the tensile strength will increase by about 100-250 MPa (15 - 35 ksi). If a shorter tempering time is used the tempering effect will be lower.
- In continuous conveyor furnaces, where the holding time at temperature is very short (min. 3 minutes), the temperature can be increased to about 425°C (780°F)
- In the 'as delivered' condition, the ratio proof strength/tensile strength is about 0.80. After tempering the ratio will be about 0.85
Please note that tension springs coiled with initial tension must not be tempered at the same high temperature as other types of spring. We recommend batch annealing at 200°C (390°F)/0.5–3 h, or continuous tempering in a conveyor furnace with a holding time of 3–20 minutes at about 250°C (480°F).
Bending
The minimum bending radius should not be less than half the wire diameter. Wire surfaces should be free from any damage caused by tooling, since slight imperfections in the surface can lead to fracture even at large bending radii.
Disclaimer: Alleima is not providing any products or services that are intended or may be construed to be recommending or otherwise advising on, in any manner, the design, suitability, appropriateness or effectiveness, from a medical/biological/safety perspective, of any medical material, instrument and/or medical device.