ASTM A193M Grade B16 Specification

ASTM A193M Grade B16 is a standard material specification under ASTM A193M, 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 A193M 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 ASTM A193M 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.

ASTM A193M Grade B16 Raw Material

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

ASTM A193M Grade B16 Chemical Composition

Carbon	Manganese, max	Phosphorus, max	Sulfur, max	Silicon	Chromium	Molybdenum	Vanadium	Aluminium
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

ASTM A193M Grade B16 Mechanical Properties

Diameter	Tensile Strength, Min	Yield Strength, Min	Elongation, Min	Reduction, Min	Hardness, Max
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

ASTM A193M Grade B16 Bolt Marking

Manufacturer's Mark	Grade Marking
BPF	B16

ASTM A193M Grade B16 Recommended Nuts & Washers

Nuts	Washers
ASTM A194 Grade B16	ASTM F436

Note: Heat Treatment: Quenched & Tempered at 860º C minimum.

ASTM A193M Grade B16 Fasteners

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