General Characteristics
305/4303 is a high-nickel alternative to 304/4301 with reduced strain hardening and excellent cold forming properties. Ideal for parts that require high deformation degrees.
305/4303 is an austenitic stainless steel that belongs to the standard CrNi stainless steel family. It has 12.5 wt.-% nickel for improved formability.
The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products. 305/4303 is available in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.
Typical Applications
Industrial parts with complex shapes
Sinks and other deep-drawn products
Complex stamping processes
Re-rollers producing very thin gauge coils
Product forms, available sizes and finishes
Flat
| Product type | Finishes | Thickness | Width |
| Black hot band | 1U | 2,50-8,00 | 50-1550 |
Cold rolled coil | 2B, 2BB, 2C, 2D, 2E, 2G, 2H, 2J, 2M, 2R | 0,05-6,35 | 3-1586 |
Cold rolled sheet | 2B, 2BB, 2D, 2E, 2G, 2H, 2J, 2M, 2R | 0,30-6,35 | 350-1586 |
Hot rolled coil, pickled | 1C, 1D, 1G, 1M, 1U | 2,00-10,00 | 50-1586 |
Precision strip | 2H, 2R | 0,05-1,50 | 3-649 |
Long
| Product type | Thickness | Width |
Bloom | 395,00-405,00 | 295-305 |
Cast billet | 127,00-180,00 | 127-180 |
Wire rod (Rod coil) hex | 9,00-27,00 | 9-27 |
Wire rod (Rod coil) round | 5,00-27,00 | 5-27 |
Wire rod (Rod coil) square | 9,00-24,00 | 9-24 |
Chemical Composition
The typical chemical composition for this grade is given in the table below, together with composition limits given for the product according to different standards. The required standard will be fully met as specified on the order.
The chemical composition is given as % by mass.
| C | Mn | Cr | Ni | N | |
| Typical | 0.04 | 17.7 | 12.5 | ||
ASTM A240 | ≤0.12 | ≤2.00 | 17.0-19.0 | 10.5-13.0 | |
EN 10088-2 | ≤0.06 | ≤2.0 | 17.0-19.0 | 11.0-13.0 | ≤0.10 |
EN 10088-3 | ≤0.06 | ≤2.00 | 17.0-19.0 | 11.0-13.0 | ≤0.10 |
Mechanical Properties
The mechanical properties of the available products in soft annealed condition at room temperature are given in the table below. Moderate strengths can be reached at elevated temperatures (~550 °C/1022 °F). Temperatures for excessive scaling are close to 850 °C/1562 °F.
This grade, along with other austenitic corrosion-resistant steels, exhibits very high ductility and high elongation to fracture. It is not susceptible to brittle fracture in the solution annealed condition.
| Standard | Rp0.2 | Rp1.0 | Rm | Elongation | Rockwell | HB |
MPa | MPa | MPa | % | |||
Product type: Cold rolled coil and sheet | ||||||
Typical (thickness 1 mm) | 260 | 280 | 570 | 70 | ||
ASTM A240 | ≥ 205 | ≥ 515 | ≤ 88HRB | ≤ 183 | ||
EN 10088-2 | ≥ 220 | ≥ 250 | 500-650 | |||
Product type: Hot rolled coil and sheet | ||||||
Typical (thickness 4 mm) | 300 | 340 | 570 | 57 | 77 | |
ASTM A240 | ≥ 205 | ≥ 515 | ≤ 183 | |||
Product type: Hot rolled quarto plate | ||||||
Typical (thickness 15 mm) | 235 | 265 | 555 | |||
ASTM A240 | ≥ 205 | ≥ 515 | ≤ 183 | |||
Product type: Semifinished (bloom, billet, ingot, slab) | ||||||
Typical | 250 | 280 | 570 | 50 | ||
Physical Properties
| Density | Modulus of elasticity | Thermal exp. at 100 °C | Thermal conductivity | Thermal capacity | Electrical resistance | Magnetizable |
kg/dm3 | GPa | 10-6/°C | W/m°C | J/kg°C | µΩm | |
7.9 | 200 | 16,0 | 15 | 500 | 0.73 | No |
