Stainless Steel - Grade 430 (UNS S43000)

Key Properties

The following sections will provide the key properties of grade 430 stainless steels coil, sheet and plate - covered under ASTM A240/A240M.

Composition

The chemical compositions of various elements of grade 430 stainless steels are tabulated below.

Table 1 – Chemical compositions of grade 430 stainless steels

GradeN		C	Mn	Si	P	S	Cr	Mo	Ni	N
430	min. max.	- 0.12	- 1	- 1	- 0.04	- 0.030	16 18	-	- 0.50	-
430F	min. max.	- 0.12	- 1.25	- 1	- 0.06	0.15 -	16 18	-	-	-

Mechanical Properties

The mechanical properties for grade 430 stainless steels are listed in the table below.

Table 2 - Mechanical properties of grade 430 stainless steels

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
430	483	310	22	85	183
430F	552 typical	379 typical	25 typical	-	262

Physical Properties

The following table outlines the physical properties of grade 430 stainless steels.

Table 3 - Physical properties of grade 430 stainless steels in the annealed condition

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
430	7750	200	10.4	11.0	11.4	26.1	26.3	460	600
430F	7750	200	10.4	11.0	11.4	26.1	26.3	460	600

Grade Specification Comparison

A comparison of grade specifications for 430 stainless steels is given in the following table.

Table 4 - Grade specifications for 430 stainless steels

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
430	S43000	430S17	60	1.4016	X8Cr17	2320	SUS 430
430F	S43020	-	-	1.4104	X12CrMoS17	2383	SUS 430F