AISI 321 – X6CrNiTi18-10 – DIN 1.4541

321 grade is within austenitic stainless steels group, and is stabilised with Titanium (Ti).

Corrosion resistance is similar to 304L grade, and it is resistant to natural waters. Intergranular corrosion resistance is superior due to Titanium (Ti) addition.

Formability and weldability is good in 321 grade, similar to other austenitic grades. Machinability and forgeability is low. Heat resistance is up to 900°C.

This grade is non-magnetic in annealed condition. 321 grade is not polishable, therefore not suitable for decorative purposes.

Available forms: Round Bars, Flat Bars, Hexagon Bars, Coils, Sheets, Strips, Welded Tubes, Seamless Tubes, Profiles, Fittings.

Chemical Compositions

Element	% Present (in product form)
	C, H, P	L	TW	TS
Carbon (C)	≤0.08	≤0.08	≤0.08	≤0.08
Silicon (Si)	≤1.00	≤1.00	≤1.00	≤1.00
Manganese (Mn)	≤2.00	≤2.00	≤2.00	≤2.00
Phosphorous (P)	≤0.045	≤0.045	≤0.0453)	≤0.040
Sulfur (S)	≤0.0151)	≤0.0301)	≤0.0153)	≤0.0151)
Chromium (Cr)	17.00 – 19.00	17.00 – 19.00	17.00 – 19.00	17.00 – 19.00
Nickel (Ni)	9.00 – 12.00	9.00 – 12.002)	9.00 – 12.00	9.00 – 12.002)
Titanium (Ti)	5xC to 0.70	5xC to 0.70	5xC to 0.70	5xC to 0.70
Iron (Fe)	Balance	Balance	Balance	Balance

Product Form	Max Thickness (mm)	Yield Strength		Tensile Strength	Elongation min. in %		Impact Energy (ISO-V) ≥ 10mm thick
		0.2% Rp0.2 N/mm2	1% Rp1.0 N/mm2	Rm N/mm2	A1) %min (longitudinal)	A1) %min (transverse)	Jmin (longitudinal)	Jmin (transverse)
C	8	2203)	2203)	520-7203)	–	40	–	–
H	13.5	2003)	2403)	520-7203)	–	40	100	60
P	75	2003)	2403)	500-7003)	–	40	100	60
L	160	1904)	2254)	500-7004)	40	–	100	–
L	2502)	1907)	2257)	500-7007)	–	30	–	60
TW	60	1805)	2155)	460-6805)	35	30	100	60
TS	60	1805)	2155)	460-6805)	35	30	100	60