A887 Type 304B4 Grade B S30464 - ASTM A 887-2020

Grade	A887 Type 304B4 Grade B
USA UNS	S30464
Corresponding Standard	ASTM A 887-2020 Standard Specification for Borated Stainless Steel Plate, Sheet, and Strip for Nuclear Application
Classification	Other Stainless Steels

A887 Type 304B4 Grade B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	N	B	Co ^①
Minimum Value	-	-	-	-	-	18	12	-	1	-
Maximum Value	0.08	0.75	2	0.045	0.03	20	15	0.1	1.24	0.2

① Cobalt concentration shall be limited to 0.2 maximum. unless a lower concentration is agreed upon between the purchaser and the supplier.

A887 Type 304B4 Grade B Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
≥515	≥205	≥16	HB: ≤217 HRB: ≤95

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