DENSITY OF STEEL

The density of steel is in the range of 7.75 and 8.05 g/cm³ (7750 and 8050 kg/m³ or 0.280 and 0.291 lb/in³). The theoretical density of mild steel (low-carbon steel) is about 7.87 g/cm³ (0.284 lb/in³). 

Density of carbon steels, alloy steels, tool steels and stainless steels are shown below in g/cm³, kg/m³ and lb/in³.

Room Temperature Density Values for Steel
Material	Density
	g/cm3	kg/m3	lb / in3
Density of Carbon Steels
ASTM A36	7.85	7850	0.284
AISI 1010	7.87	7870	0.284
AISI 1018	7.87	7870	0.284
AISI 1020	7.87	7870	0.284
AISI 1025	7.86	7860	0.284
AISI 1040	7.845	7845	0.2834
AISI 1045	7.87	7870	0.284
Density of Alloy Steels
AISI 4037	7.85	7850	0.284
AISI 4130	7.85	7850	0.284
AISI 4140	7.85	7850	0.284
AISI 4150	7.85	7850	0.284
AISI 4340	7.85	7850	0.284
Density of Stainless Steels
Grade 304	8.00	8000	0.289
Grade 316	8.00	8000	0.289
Grade 405	7.80	7800	0.282
Grade 440C	7.80	7800	0.282
PH 15-7 Mo	7.804	7804	0.2819
17-4 PH	7.80	7800	0.282
17-7 PH	7.81	7810	0.282
Density of Tool Steels
D2 tool steel	7.695	7695	0.278
T1 tool steel	8.67	8670	0.313
M2 tool steel	8.16	8160	0.294
W1 tool steel	7.83	7830	0.283
O1 tool steel	7.81	7810	0.282
O6 tool steel	7.67	7670	0.277
A2 tool steel	7.86	7860	0.284
A6 tool steel	8.03	8030	0.290
H13 tool steel	7.80	7800	0.282
H22 tool steel	8.36	8360	0.302
P20 tool steel	7.85	7850	0.284
S7 tool steel	7.83	7830	0.283

Definitions:

Density: The density of a material is the mass contained in a unit volume. The unit of density is kg/m³ or lb/in³.For solid materials, density decreases with increasing temperature.

Reference:

• Davis, J.R. Metals Handbook Desk Edition. ASM, 1998.