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 | 860 | 725 | 18 | 50 | 321 HB or 35 HRC |
| over M64 to M100 | 760 | 655 | 17 | 45 | 321 HB or 35 HRC |
| over M100 to M180 | 690 | 586 | 16 | 45 | 321 HB or 35 HRC |
Minimum Tempering Temperature: 650℃
