ASTM A193 B16

ASTM A193 Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service

Grade: B16 — Ferritic Steels / Chromium-Molybdenum-Vanadium

Chemical Requirements (Composition, percent)

C: 0.36-0.47

Mn: 0.45-0.70

P: ≤0.035

S: ≤0.040

Si: 0.15-0.35

Cr: 0.80-1.15

Mo: 0.50-0.65

V: 0.25-0.35

Al: ≤0.015 (Total of soluble and insoluble)

Mechanical Requirements —Metric Products

Diameter, [mm]

Tensile Strength,

min,MPa

Yield Strength,

min, 0.2 % offset, MPa

Elongation

in 4D, min, %

Reduction of Area,

min, %

Hardness,

max

M64 and under

8607251850321 HB or 35 HRC
over M64 to M1007606551745

321 HB or 35 HRC

over M100 to M1806905861645

321 HB or 35 HRC

Minimum Tempering Temperature: 650℃