ASTM A193 Grade B16

ASTM A193 Grade B16 is a standard material specification under ASTM A193, for alloy steel bolting material, for use in high tensile, high temperature and special purpose applications.

Grade B16 is a heat-treated chromium-molybdenum-vanadium (Cr-Mo-V) alloy steel with maximum tensile strength of 860 MPa, yield 725, and 35HRC hardness. ASTM A193 grade B16 is similar to grade B7 but the addition of vanadium enhances its strength holding capacity at high temperatures. Grade B16 is suitable for applications up-to 450°C (840°F). Fasteners produced under ASTN A193 Grade B16 standard are mainly used for power generation and allied sectors.

Grade B16 is specified for bolts, studs, stud bolts, threaded rods, screws, bar stock and similar parts, intended for use in bolting applications. Visit our A193-Grade-B16 microsite for specific details.

Download PDF

ASTM A193 Grade B16 Raw Material

Grade	Steel Description
Grade B16	Chromium-Molybdenum-Vanadium Alloy Steel, Quenched & Tempered

ASTM A193 Grade B16 Properties

Carbon	Manganese, max	Phosphorus, max	Sulfur, max	Silicon	Chromium	Molybdenum	Vanadium	Aluminium
ASTM A193 Grade B16 Chemical Composition
0.36 - 0.47	0.45 - 0.70	0.035 max	0.040 max	0.15 - 0.35	0.80 - 1.15	0.50 - 0.65	0.25 - 0.35	0.015 max

Diameter	Tensile Strength, Min	Yield Strength, Min	Elongation, Min	Reduction, Min	Hardness, Max
ASTM A193 Grade B16 Mechanical Properties
Over M64 to M100	760 MPa	655 MPa	17 %	45 %	321 HBW or 35 HRC
Over M100 to M180	690 MPa	585 MPa	16 %	45 %	321 HBW or 35 HRC

Heat Treatment

Quenched & Tempered at 860º C minimum.

ASTM A193 Grade B16 Bolt Marking

Manufacturer's Mark	Grade Marking
BPF	B16

Recommended Nuts & Washers

Nut Grade	Washer Grade
ASTM A194 Grade 16	ASTM F436

ASTM A193 Grade B16 Bolting

Hex Bolts	Heavy Hex Bolts	Stud Bolts	Threaded Rods	Anchor Bolts
Eye Bolts	Socket Head Cap Screws	Countersunk Screws	J Bolts	Square Head Bolts