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Stainless Steel 304B Material Property Data Sheet

Do you need custom fasteners created with Stainless Steel 304B? Since our inception, Vegas Fastener Manufacturing has met every challenge of providing Quality, Timely, Cost-effective solutions for specialty fastener applications. Every product is built to your specifications, using your prints if necessary.

Below are the technical specifications of the Stainless Steel 304B Bar Stock we have available to meet your needs.


Industeel NUCL 18.10 B4 Natural Boron (Min 1% wt) Alloyed 304 Stainless Steel

Subcategory: Metal; Stainless Steel; T 300 Series Stainless Steel

Key Words: aisi304, aisi 304, DIN W.14306 Bor-01 Ind.00, ASTM A887 UNS S30464 : Type 304B4, SUS304, SS304

Component   Wt. %
Fe66.687 - 66.787 
N Max 0.1 

Material Notes:
Description: Isotope B10 has the property to capture neutrons produced by nuclear reactions. Natural boron contains about 19.9 at% or 18.45 wt % of B10 isotope, the remaining being B11 isotope. NUCL 18.10 B4 grade is a 304 stainless steel obtained by ingot casting and alloyed with 1 to 1,24 wt% natural boron additions. In order to avoid ferrite grain which reduce the ductility of the alloy, NUCL 18.10 B4 grade has been overalloyed in Nickel when compared to 304 grades. Molybdenum additions are sometimes considered to increase the corrosion resistance properties. The ingots rolled into plates are considered for nuclear applications (transport, casks, storage -in pools) of nuclear (waste) products. For specific purposes, some other grades are sometimes used. The boron content may thus be included in the 0.2-2 weight % range or/and alloys obtained by powder metallurgy (A type). CLI-FAFER can also produce 18-10 A or B type boron alloyed grades (included B10 enriched grades). Among the family of boron enriched 304 grades, NUCL 18-10 B4 grade is the most commonly used.

Iron content calculated as remainder.

Information provided by manufacturer.

Physical PropertiesMetricEnglishComments
Density7.8 g/cc0.282 lb/in 

Mechanical Properties
Hardness, BrinellMax 217Max 217 Typical
Hardness, Rockwell BMax 95Max 95 Typical
Tensile Strength, UltimateMin 515 MPaMin 74700 psi Minimum Guaranteed
Tensile Strength, Ultimate610 MPa88500 psi Typical
Tensile Strength, YieldMin 225 MPaMin 32600 psi Y.S. 1%
Tensile Strength, YieldMin 210 MPaMin 30500 psi Y.S. 0.2%
Tensile Strength, Yield310 MPa45000 psi Typical (Y.S. 0.2%)
Tensile Strength, Yield325 MPa47100 psi Typical (Y.S. 1%)
Elongation at YieldMin 16 %Min 16 % 
Elongation at Yield19 %19 % Typical
Modulus of Elasticity200 GPa29000 ksi 20C
Poisson's Ratio0.3330.333 Calculated
Shear Modulus75 GPa10900 ksi 20C

Electrical Properties
Electrical Resistivity9.5e-005 ohm-cm9.5e-005 ohm-cm 20C

Thermal Properties
CTE, linear 20C17 m/m-C9.44 in/in-F 20-100C
CTE, linear 100C17.5 m/m-C9.72 in/in-F 20-200C
CTE, linear 250C18 m/m-C10 in/in-F 20-300C
Heat Capacity0.5 J/g-C0.12 BTU/lb-F 20C
Thermal Conductivity15 W/m-K104 BTU-in/hr-ft-F 20C


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