Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
21CrMoV5-7 vs ASTM A193 Grade B16 (EN 10269 Cross-Reference)
21CrMoV5-7 (Werkstoff 1.7709) and ASTM A193 Grade B16 are the European and US designations for the same workhorse Cr-Mo-V quenched-and-tempered bolting steel family. The two grades are close cousins with overlapping chemistry, similar Q+T cycles, and a similar service envelope at 540 to 550 deg C continuous metal temperature. Most procurement specifications that allow one allow the other.
Request a Quote on Dual-Certified 21CrMoV5-7 / ASTM A193 B16 Bolting
At a Glance
| 21CrMoV5-7 | ASTM A193 Grade B16 | |
|---|---|---|
| Controlling standard | EN 10269 | ASTM A193 / ASME SA-193 |
| Werkstoff / UNS | 1.7709 | K14072 |
| Chemistry family | Cr-Mo-V Q+T | Cr-Mo-V Q+T |
| Service envelope (continuous) | up to 550 deg C | up to 540 deg C |
| Tensile (RT) | 700 to 850 MPa | 860 MPa minimum |
| 0.2 percent proof (RT) | >=550 MPa | >=725 MPa |
| Inspection cert | EN 10204 type 3.1 / 3.2 | per ASME witness or third-party inspection |
Chemistry Comparison
| Element | 21CrMoV5-7 (EN 10269) | ASTM A193 B16 |
|---|---|---|
| Carbon (C) | 0.17 to 0.25 | 0.36 to 0.47 |
| Manganese (Mn) | 0.40 to 0.80 | 0.45 to 0.70 |
| Chromium (Cr) | 1.20 to 1.50 | 0.80 to 1.15 |
| Molybdenum (Mo) | 0.55 to 0.80 | 0.50 to 0.65 |
| Vanadium (V) | 0.20 to 0.35 | 0.25 to 0.35 |
| Sulphur (S) max | 0.030 | 0.040 |
| Phosphorus (P) max | 0.030 | 0.035 |
Mechanical Comparison
| Property | 21CrMoV5-7 | ASTM A193 B16 |
|---|---|---|
| Tensile (Rm) | 700 to 850 MPa | 860 MPa minimum |
| 0.2 percent proof (RT) | >=550 MPa | >=725 MPa |
| Elongation A5 | >=16 percent | >=18 percent |
| Reduction of area | >=50 percent | >=50 percent |
| Charpy V impact (20 deg C) | >=63 J | >=20 ft-lbf (27 J) at 21 deg C |
| Hardness max | 250 HBW | 321 HBW |
When to Specify Which
Specify 21CrMoV5-7 when the procurement specification is European (EN, DIN, BS), when VdTUV Wb 350 pressure-vessel approval is required, or when the turbine OEM is Siemens, Alstom, BHEL or Mitsubishi Power on a European-derived design. Specify ASTM A193 Grade B16 when the procurement specification is ASME B31.3 piping, ASME BPVC Section VIII pressure vessels, API refinery flange standards, or when the OEM is GE, Westinghouse or another US-derived design. For cross-procurement projects, TorqBolt ships dual-certified material from the same heat lot.
Form Availability
Both grades are supplied in round bar from OD 16 to 300 mm and in the full bolting form-factor range: stud bolts, hex bolts, heavy hex bolts, tap studs, body-bound studs, nuts, washers, threaded rod and forgings.
Frequently Asked Questions
Q. Is 21CrMoV5-7 the same as ASTM A193 Grade B16?
Close but not exact. Both are Cr-Mo-V Q+T low-alloy bolting steels with overlapping chemistry and a similar service envelope around 540 to 550 deg C. Most procurement specs that allow one allow the other.
Q. What is the chemistry overlap between 21CrMoV5-7 and ASTM A193 B16?
Both target Cr 1.0 to 1.5 percent, Mo 0.5 to 0.7 percent and V 0.20 to 0.35 percent. EN 10269 sets a tighter Cr range (1.20 to 1.50) than B16 (0.80 to 1.15).
Q. Which is preferred for European versus US procurement?
European: 21CrMoV5-7 to EN 10269 (PED, VdTUV Wb 350, Siemens / Alstom / BHEL turbine bolts). US: ASTM A193 Grade B16 (ASME B31.3, ASME BPVC Section VIII, API refinery flanges, GE / Westinghouse turbines).
Q. Do you supply B16 material to the 21CrMoV5-7 chemistry window?
Yes. Both grades ship from the same heat lots with dual-certification on call-out (EN 10269 21CrMoV5-7 plus ASTM A193 Grade B16).
Related Cross-References
More cross-references: vs ASTM A193 B7 (plain Cr-Mo, no V) · vs ASTM A193 B8 (austenitic) · vs 21CrMoV5-11 (heavier-section variant) · vs 24CrMoV5-5 · vs Durehete 1055. Back to the 21CrMoV5-7 Alloy Hub.
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