Compare / 1.4401 vs 1.4301

1.4401 vs 1.4301

EN 10088-2/-3/-4/-5 · Stainless steel

Molybdenum austenitic (316): for coastal and de-icing salt exposure, fy 220 MPa plate.

EN 10088-2/-3/-4/-5 · Stainless steel

The everyday austenitic stainless (304): fy 210 MPa plate, 230 MPa cold rolled strip.

Mechanical

Property	Condition	1.4401	1.4301	Difference
0.2 % proof strength Rp0.2	t = 8 mm · cold rolled strip	≥ 240MPa1	≥ 230MPa1	−4.2 %
	t = 13.5 mm · hot rolled strip	≥ 220MPa1	≥ 210MPa1	−4.5 %
	t = 75 mm · hot rolled plate	≥ 220MPa2	≥ 210MPa2	−4.5 %
	t = 250 mm · bars, rods and sections	≥ 200MPa1	≥ 190MPa1	−5.0 %
Tensile strength Rm	t = 8 mm · cold rolled strip	≥ 530MPa1	≥ 540MPa1	+1.9 %
	t = 13.5 mm · hot rolled strip	≥ 530MPa1	≥ 520MPa1	−1.9 %
	t = 75 mm · hot rolled plate	≥ 520MPa2	≥ 520MPa2	same
	t = 250 mm · bars, rods and sections	≥ 500MPa1	≥ 500MPa1	same
Elongation after fracture A	t = 75 mm · hot rolled plate	≥ 45%1	≥ 45%1	same
Modulus of elasticity E	—	200 000MPa1	200 000MPa1	same
Shear modulus G	—	76 900MPa1	76 900MPa1	same
Poisson's ratio ν	—	0.31	0.31	same

Design values

Property	Condition	1.4401	1.4301	Difference
Partial factor for the material γM	cross-sections, γM0	1.11	1.11	same
	member instability, γM1	1.11	1.11	same
	tension to fracture, bolts, welds, γM2	1.251	1.251	same

Physical

Property	Condition	1.4401	1.4301	Difference
Density ρ	—	8 000kg/m³1	7 900kg/m³1	−1.3 %

Thermal

Property	Condition	1.4401	1.4301	Difference
Coefficient of thermal expansion α	20–100 °C	16×10⁻⁶ /K1	16×10⁻⁶ /K1	same
Specific heat capacity cp	at +20 °C	500J/(kg·K)1	500J/(kg·K)1	same
Thermal conductivity λ	at +20 °C	15W/(m·K)1	15W/(m·K)1	same

Chemical and durability

Property	Condition	1.4401	1.4301	Difference
Corrosion resistance class CRC	—	III1	II1

Fire

Property	Condition	1.4401	1.4301	Difference
0.2 % proof strength reduction factor in fire kp0.2,θ	at +20 °C	11	11	same
	at +100 °C	0.861	0.781	−9.3 %
	at +200 °C	0.721	0.651	−9.7 %
	at +300 °C	0.671	0.61	−10 %
	at +400 °C	0.621	0.551	−11 %
	at +500 °C	0.61	0.51	−17 %
	at +600 °C	0.561	0.461	−18 %
	at +700 °C	0.51	0.381	−24 %
	at +800 °C	0.411	0.251	−39 %
	at +900 °C	0.221	0.151	−32 %
	at +1000 °C	0.141	0.071	−50 %
	at +1100 °C	0.071	0.051	−29 %
Elastic modulus reduction factor kE,θ	at +20 °C	11	11	same
	at +100 °C	0.961	0.961	same
	at +200 °C	0.921	0.921	same
	at +300 °C	0.881	0.881	same
	at +400 °C	0.841	0.841	same
	at +500 °C	0.81	0.81	same
	at +600 °C	0.761	0.761	same
	at +700 °C	0.711	0.711	same
	at +800 °C	0.631	0.631	same
	at +900 °C	0.451	0.451	same
	at +1000 °C	0.21	0.21	same
	at +1100 °C	0.11	0.11	same
Ultimate strength reduction factor ku,θ	at +20 °C	11	11	same
	at +100 °C	0.871	0.811	−6.9 %
	at +200 °C	0.81	0.721	−10 %
	at +300 °C	0.781	0.681	−13 %
	at +400 °C	0.771	0.661	−14 %
	at +500 °C	0.741	0.611	−18 %
	at +600 °C	0.671	0.541	−19 %
	at +700 °C	0.511	0.41	−22 %
	at +800 °C	0.341	0.251	−26 %
	at +900 °C	0.191	0.131	−32 %
	at +1000 °C	0.11	0.081	−20 %
	at +1100 °C	0.071	0.051	−29 %

Rows are matched by condition (thickness band, temperature, product form). A dash means the grade has no sourced value for that condition. Differences are 1.4301 relative to 1.4401; for ranges the lower bound is compared.