AISI 302 | 1.4310 | BS 301S21 | X10CrNi18-8 | Austenitic stainless steel
Data sheet according to DIN EN ISO 6931-1 for material number AISI 302 / 1.4310
The material AISI 302 is an austenitic stainless steel, also known under the designations 1.4310, BS 301S21 and X10CrNi18-8. The stainless steel AISI 302 belongs to the group of V2A steels and is also known as spring steel, as it is used for the production of technical springs. It can be used at temperatures of up to 300 °C. Austenitic steel 302 has good corrosion resistance (PREN value 16.0 - 23.4), which can be improved by polishing. It is not resistant to seawater. Stainless steel 1.4310 (AISI 302 / X10CrNi18-8) is characterised by a tensile strength of 500 - 700 N/mm², a hardness of ≤ 230 HB and a density of 7.9 kg/dm³ (at 20°C). The material has very good weldability and good forgeability. It is suitable for cold heading and cold forming. The material is non-magnetic and only slightly magnetisable. However, the magnetisability can be changed by cold forming. Due to the high degree of work hardening and the low thermal conductivity, this stainless steel has only a medium machinability. It is rarely used for machining. The automotive and chemical industries are among the industrial sectors that regularly use this austenitic stainless steel.
Specifications of the material
EN material number 1.4310
EN short name X10CrNi18-8
EN standard ISO 6931-1
Microstructure class Austenite
Comparable standards and designations
AFNOR Z11CN17-08 / Z12CN18-09
AISI 301 / 302
Alloy 302
AMS 5516
ASTM 301
BS 301S21
ČSN 17241 / 17242
DIN X12CrNi17-7
JIS SUS301
PN 1H18N9
RVS 302
SAE 302
SIS / SS 2331
UNE F.3517
UNS 30200
Properties and chemical composition of stainless steel AISI 302 / 1.4310
C | Si | Mn | P | S | N | Cr | Cu | Mo | Ni | Ti |
|---|---|---|---|---|---|---|---|---|---|---|
0,05 – 0,15 | ≤ 2,00 | ≤ 2,00 | ≤ 0,045 | ≤ 0,015 | ≤ 0,10 | 16,0 – 19,0 | - | ≤ 0,80 | 6,0 – 9,5 | - |
Mass fraction in % according to DIN EN ISO 6931-1
Abbreviations: C = carbon, Cr = chromium, Cu = copper, Mn = manganese, Mo = molybdenum, N = nitrogen, Ni = nickel, P = phosphorus, S = sulphur, Si = silicon, Ti = thallium.
Physical properties
Magnetizability: Little
Density (kg/dm³): 7,9
Thermal conductivity (up to 20°C): 15
Electronic resistance at room temperature (in Ω mm²/m): 0,73
Mechanical properties
The values given refer to the diameter range ≤ 40 (Ø in mm)*
Hardness in HB: ≤ 230
Yield strength Rp0.2 in Mpa: ≥ 195
Yield strength Rp1.0 in Mpa: ≥ 230
Strength / tensile strength Rm in Mpa: 500-700
Elongation at break A in % (longitudinal): 40
* These values refer to mechanical properties at room temperature in the solution-annealed condition (+AT) according to DIN EN ISO 6931-1.
Yield strengths at elevated temperature in the solution-annealed condition
Temp in °C | 100 °C | 150 °C | 200 °C | 250 °C | 300 °C |
|---|---|---|---|---|---|
Rp1,0 in Mpa | 230 | 215 | 205 | 200 | 195 |
Rp0,2 in Mpa | 210 | 200 | 190 | 185 | 180 |
Stainless steel AISI 302 (1.4310, X10CrNi18-8) has very good weldability and is suitable for all common welding processes such as TIG welding, arc welding or laser beam welding. A welding filler material and heat treatment after welding are not required. We recommend that you use our CEV calculator to assess the weldability.
Forging
The stainless steel AISI 302 (301S21) has good forging properties. The material should first be heated slowly to a temperature of around 1150 °C to 1200 °C. Forging can then take place in the temperature range from 1200 °C to 900 °C. The material should then be cooled in water or in air. Open-die forging and drop forging are possible.
Heat treatment and hot forming
Solution heat treatment (cooling by air or water): 1000-1100 °C
Hot forming (cooling by air): 1200-900 °C
Cold forming
Austenitic stainless steel AISI 302 (301S21) can be used for cold forming. However, cold forming causes the material to become very hard. At the same time, its corrosion resistance decreases. Friction martensite can also cause a change in magnetisability, which can make the material magnetic.
Corrosion resistance
Stainless steel AISI 302 (1.4310, X10CrNi18-8) has good corrosion resistance (PREN value 16.0 - 23.4), which is maintained up to a temperature of 300 °C. Corrosion resistance is improved by polishing. Corrosion resistance decreases during cold forming. Due to the low carbon content, the material tends to sensitisation and the formation of chromium carbides, which can lead to intercrystalline corrosion. The material AISI 302 is resistant to water vapour at room temperature. It is not resistant to seawater and salt (NaCl). In combination with these, pitting corrosion can occur.
Applications of stainless steel AISI 302 / 1.4310
The typical application of spring steel 302 / BS 301S21 is the production of stainless technical springs. Different types of springs are made from this material, such as compression springs, tension springs, return springs, hook springs or coil springs. Stainless steel AISI 302 is used in various industrial sectors. These include the automotive and mechanical engineering industries, as well as the chemical and food industries. Electrical components are also made from this material.
Stock of stainless steel wire
Stainless steel wire AISI 302 (1.4310 / X10CrNi18-8) is one of the most important materials in our product range. We therefore regularly keep this material in stock in various dimensions between 0.10 mm and 18.00 mm. You can find a list of the diameters that we often stock by clicking on the link below.
The data provided in this data sheet or material information sheet has been compiled to the best of our knowledge and is based on the current version of the relevant standard. We do not accept any liability for any errors.
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