304 Stainless Steel Grade

 

Chemical Composition

Type 304 grade stainless steel composition is given in table below.

Datasheet 1, AISI 304 stainless steel composition

Chemical Composition, %
ASTM	AISI (UNS)	C, ≤	Si, ≤	Mn, ≤	P, ≤	S, ≤	Cr	Ni	N, ≤	Product
ASTM A240/A240M	304 (UNS S30400)	0.07	0.75	2.00	0.045	0.030	17.5-19.5	8.0-10.5	0.10	Plate, Sheet, and Strip
ASTM A276/276M		0.08	1.00	2.00	0.045	0.030	18.0-20.0	8.0-11.0	–	Bars and Shapes

SS304 Stainless Steel Mechanical Properties

Datasheet-2, the tables below list SS304 material mechanical properties including yield strength, tensile strength, elongation and hardness, etc.

Mechanical Properties, data are for 25.4 mm (1 in.) diameter bar
Steel (UNS)	Tensile strength, MPa (ksi)	Yield strength, MPa (ksi)	Elongation in 50 mm (2 in.), % ≥	Reduction in area (%)	Hardness (HB)	Condition
AISI 304 (UNS S30400)	585 (85)	235 (34)	60	70	149	Annealed bar
	690 (100)	415 (60)	45		212	Annealed and cold drawn
	860 (125)	655 (95)	25		275	Cold drawn high tensile

Datasheet 3, ASTM 304 Stainless Steel Properties – Mechanical Properties

Mechanical Properties
ASTM Type	AISI (UNS)	Tensile Strength, MPa (ksi)	0.2% Yield Strength, MPa (ksi)	Elongation in 50 mm (2 in.), % ≥	Reduction of Area, %, ≥	Brinell Hardness (HBW) ≤	Rockwell Hardness (HRBW) ≤	Product	Condition
ASTM A240/A240M	304 (UNS S30400)	515 (75)	205 (30)	40	–	201	92	Plate, Sheet, and Strip	–
ASTM A276A/276M		515 (75)	205 (30)	40	50	–	–	Bars and Shapes	Hot finished
		620 (90)	310 (45)	30	40	–	–		Cold finished, Dia ≤ 12.7mm (0.5 in)
		515 (75)	205 (30)	30	40	–	–		Cold finished, Dia. > 12.7mm (0.5 in)