Grade A887 Type 304B7 Grade A
USA UNS S30467
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 304B7 Grade A Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni N B Co
Minimum Value - - - - - 18 12 - 1.75 -
Maximum Value 0.08 0.75 2 0.045 0.03 20 15 0.1 2.25 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 304B7 Grade A Mechanical Properties
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Hardness
HBW
Impact Energy Absorption
KV2
J
≥515 ≥205 ≥17 HB: ≤241
HRB: ≤100
≥14

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