Compare / 1.4404 vs 1.4401

1.4404 vs 1.4401

EN 10088-2/-3/-4/-5 · Stainless steel

Low-carbon 316L, the usual molybdenum grade for welded structures.

EN 10088-2/-3/-4/-5 · Stainless steel

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

Mechanical

Property	Condition	1.4404	1.4401	Difference
0.2 % proof strength Rp0.2	t = 8 mm · cold rolled strip	≥ 240MPa1	≥ 240MPa1	same
	t = 13.5 mm · hot rolled strip	≥ 220MPa1	≥ 220MPa1	same
	t = 75 mm · hot rolled plate	≥ 220MPa2	≥ 220MPa2	same
	t = 250 mm · bars, rods and sections	≥ 200MPa1	≥ 200MPa1	same
Tensile strength Rm	t = 8 mm · cold rolled strip	≥ 530MPa1	≥ 530MPa1	same
	t = 13.5 mm · hot rolled strip	≥ 530MPa1	≥ 530MPa1	same
	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	1.4404	1.4401	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	1.4404	1.4401	Difference
Density ρ	—	8 000kg/m³1	8 000kg/m³1	same

Thermal

Property	Condition	1.4404	1.4401	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	1.4404	1.4401	Difference
Corrosion resistance class CRC	—	III1	III1

Fire

Property	Condition	1.4404	1.4401	Difference
0.2 % proof strength reduction factor in fire kp0.2,θ	at +20 °C	11	11	same
	at +100 °C	0.861	0.861	same
	at +200 °C	0.721	0.721	same
	at +300 °C	0.671	0.671	same
	at +400 °C	0.621	0.621	same
	at +500 °C	0.61	0.61	same
	at +600 °C	0.561	0.561	same
	at +700 °C	0.51	0.51	same
	at +800 °C	0.411	0.411	same
	at +900 °C	0.221	0.221	same
	at +1000 °C	0.141	0.141	same
	at +1100 °C	0.071	0.071	same
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	0.871	same
	at +200 °C	0.81	0.81	same
	at +300 °C	0.781	0.781	same
	at +400 °C	0.771	0.771	same
	at +500 °C	0.741	0.741	same
	at +600 °C	0.671	0.671	same
	at +700 °C	0.511	0.511	same
	at +800 °C	0.341	0.341	same
	at +900 °C	0.191	0.191	same
	at +1000 °C	0.11	0.11	same
	at +1100 °C	0.071	0.071	same

Rows are matched by condition (thickness band, temperature, product form). A dash means the grade has no sourced value for that condition. Differences are 1.4401 relative to 1.4404; for ranges the lower bound is compared.