Compare / 1.4571 vs 1.4404

1.4571 vs 1.4404

EN 10088-2/-3/-4/-5 · Stainless steel

Titanium-stabilised 316 (Ti 5×C to 0.7 %); largely replaced by 1.4404.

EN 10088-2/-3/-4/-5 · Stainless steel

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

Mechanical

Property	Condition	1.4571	1.4404	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	≥ 540MPa1	≥ 530MPa1	−1.9 %
	t = 13.5 mm · hot rolled strip	≥ 540MPa1	≥ 530MPa1	−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	≥ 40%1	≥ 45%1	+13 %
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	1.4571	1.4404	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	1.4571	1.4404	Difference
Density ρ	—	8 000kg/m³1	8 000kg/m³1	same

Thermal

Property	Condition	1.4571	1.4404	Difference
Coefficient of thermal expansion α	20–100 °C	16.5×10⁻⁶ /K1	16×10⁻⁶ /K1	−3.0 %
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	1.4571	1.4404	Difference
Corrosion resistance class CRC	—	III1	III1

Fire

Property	Condition	1.4571	1.4404	Difference
0.2 % proof strength reduction factor in fire kp0.2,θ	at +20 °C	11	11	same
	at +100 °C	0.891	0.861	−3.4 %
	at +200 °C	0.821	0.721	−12 %
	at +300 °C	0.771	0.671	−13 %
	at +400 °C	0.721	0.621	−14 %
	at +500 °C	0.691	0.61	−13 %
	at +600 °C	0.651	0.561	−14 %
	at +700 °C	0.591	0.51	−15 %
	at +800 °C	0.511	0.411	−20 %
	at +900 °C	0.291	0.221	−24 %
	at +1000 °C	0.151	0.141	−6.7 %
	at +1100 °C	—	0.071
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
Ultimate strength reduction factor ku,θ	at +20 °C	11	11	same
	at +100 °C	0.881	0.871	−1.1 %
	at +200 °C	0.811	0.81	−1.2 %
	at +300 °C	0.791	0.781	−1.3 %
	at +400 °C	0.791	0.771	−2.5 %
	at +500 °C	0.771	0.741	−3.9 %
	at +600 °C	0.711	0.671	−5.6 %
	at +700 °C	0.571	0.511	−11 %
	at +800 °C	0.381	0.341	−11 %
	at +900 °C	0.231	0.191	−17 %
	at +1000 °C	0.11	0.11	same
	at +1100 °C	—	0.071

Rows are matched by condition (thickness band, temperature, product form). A dash means the grade has no sourced value for that condition. Differences are 1.4404 relative to 1.4571; for ranges the lower bound is compared.