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ASTM B193 B16 Alloy Round Bar Diameter 20 - 350mm for Bolt Structure Custom Cutting in Length
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xProduct Details
| Products Name | Alloy Steel Round Bar | Diameter | 10 - 450mm |
|---|---|---|---|
| Length | 6m | Tech | Hot Rolled |
| Service | Cutting | MOQ | 1 Ton |
| Loading Port | Shanghai Port | Standard | ASTM EN GB |
Product Description
ASTM B193 B16 Alloy Round Bar Diameter 20 - 350mm for Bolt Structure Custom Cutting in Length
Products Specification
|
Products Name |
B16 Alloy Steel Round Bar |
|
Diameter |
10 - 350 mm |
|
Length |
6m or custom cutting any length as request |
|
Type |
Hot Rolled |
|
Brand |
BAOSTEEL DELTA DONGBEI HUAXI SHAGANG.etc |
|
MOQ |
1 Ton |
|
Loading Port |
Shanghai Port |
|
Packing |
packing by steel wire rope |
|
Deliver time |
5 - 7 days for stock materials |
|
Other Grade |
Q195,Q235,10#,20#,35#,45#,Q215,Q345,12Cr1Mov,15CrMo ,20Cr,40Cr,20CrMo,35CrMo,42CrMo,40CrNiMo,GCr15,65Mn,50Mn, 50Cr,3Cr2W8V,20CrMnTi,25Cr2MoVA,5CrMnMo ,38CrMoAl, 30CrMnSiA,B16,31CrMoV9 |
|
Standard |
ASTM GB EN DIN |
|
Application |
Structure and Industrial |
ASTM A193 B16 Alloy Round Bar Diameter 20 – 350mm for Bolt Structure – Custom Cutting in Length
Product Overview
ASTM A193 Grade B16 alloy round bar is a high-performance chromium-molybdenum-vanadium (Cr-Mo-V) steel specifically engineered for demanding high-temperature and high-pressure applications. Widely used in the power generation, petrochemical, and oil & gas industries, this material offers exceptional tensile strength, creep resistance, and structural integrity under extreme thermal and mechanical stress.
Our ASTM A193 B16 alloy round bars are manufactured to meet or exceed the requirements of ASTM A193/A193M standards (latest revision: ASTM A193/A193M-2017). Available in diameters ranging from 20 mm to 350 mm, these bars are ideal for producing critical bolting components such as studs, bolts, threaded rods, and fasteners used in turbines, pressure vessels, flanges, and valves.
All products undergo rigorous quality control, including full chemical analysis, mechanical testing, and non-destructive inspection. We offer custom cutting to length based on your engineering drawings or specifications, ensuring seamless integration into your manufacturing or maintenance workflow.
Key Features & Benefits
- ✅ High-Temperature Strength: Maintains mechanical properties up to 540°C (1000°F)
- ✅ Excellent Creep & Rupture Resistance: Ideal for long-term service in elevated temperature environments
- ✅ Quenched & Tempered (Q&T): Heat-treated to achieve optimal hardness and toughness
- ✅ Precise Dimensional Tolerances: Ground or peeled surface finish available upon request
- ✅ Custom Length Cutting: Minimizes waste and reduces machining time
- ✅ Traceable Mill Test Reports (MTRs): Full compliance with ASTM, ASME, and NACE standards
Chemical Composition (ASTM A193 Grade B16)
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.36 – 0.47 |
| Manganese (Mn) | 0.45 – 0.70 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Silicon (Si) | 0.15 – 0.35 |
| Chromium (Cr) | 0.80 – 1.15 |
| Molybdenum (Mo) | 0.50 – 0.65 |
| Vanadium (V) | 0.25 – 0.35 |
| Aluminum (Al) | ≤ 0.015 |
Note: Exact composition may vary slightly based on heat treatment and mill practices but remains within ASTM-specified limits.
Mechanical Properties
| Property | Requirement |
|---|---|
| Tensile Strength | ≥ 862 MPa (125 ksi) |
| Yield Strength (0.2% Offset) | ≥ 725 MPa (105 ksi) |
| Elongation (in 4D) | ≥ 32% |
| Reduction of Area | ≥ 35% |
| Hardness | ≤ 35 HRC (≈ 321 HB max) |
Properties are typical values after quenching and tempering at ≥ 649°C (1200°F). Actual values depend on bar diameter and heat lot.
Heat Treatment Process
All ASTM A193 B16 round bars are supplied in the quenched and tempered (Q&T) condition:
- Austenitizing: Heated to ～870–925°C (1600–1700°F)
- Quenching: Rapidly cooled in oil or water
- Tempering: Reheated to minimum 649°C (1200°F) and held for sufficient time to achieve desired mechanical properties
This process ensures a uniform microstructure with balanced strength and ductility—critical for safety-critical bolting applications.
Product Specifications
| Parameter | Details |
|---|---|
| Standard | ASTM A193 / A193M (Grade B16) |
| Equivalent Grades | UNS K11547, DIN 1.7734, Chinese 40CrMoV |
| Diameter Range | 20 mm – 350 mm (0.79" – 13.78") |
| Length Options | Standard: 3m, 6m; Custom cut-to-length available (min. 500 mm) |
| Surface Finish | Black hot-rolled, peeled, turned, or ground (upon request) |
| Tolerance | Per ASTM A484 or ISO 286 (h9/h11 as standard) |
| Certification | EN 10204 3.1 / 3.2, Mill Test Report (MTR), Chemical & Mechanical Reports |
| Packaging | Bundled with steel straps, waterproof wrapping, wooden crates for export |
Common Applications
ASTM A193 B16 alloy round bars are primarily used to manufacture high-strength bolting components in severe service conditions:
- Steam turbine bolts & studs (high-pressure sections)
- Flange fasteners in refineries and chemical plants
- Pressure vessel closures and manway bolts
- Superheater headers and boiler connections
- Power plant piping systems (main steam lines)
- Offshore & onshore oil & gas wellhead assemblies
Due to its superior performance over standard carbon steel or even B7 bolts in temperatures above 400°C, B16 is the preferred choice for long-term reliability in critical infrastructure.
Why Choose Our ASTM A193 B16 Round Bars?
- Strict Quality Control: Every batch is tested per ASTM E8 (tensile), E18 (hardness), and E45 (inclusion rating).
- Global Compliance: Materials meet ASME BPVC Section II, NACE MR0175/ISO 15156 (for sour service when required).
- Customization: We cut to your exact length—whether 1,250 mm for turbine studs or 4,800 mm for anchor bolts.
- Fast Lead Time: Stock available in major diameters (20–150 mm); larger sizes (151–350 mm) produced within 4–6 weeks.
- Technical Support: Our metallurgical team provides guidance on heat treatment, threading, and installation best practices.
Ordering Information
To place an order or request a quote, please provide the following details:
- Required diameter (e.g., 50 mm, 120 mm, 250 mm)
- Total length or cut lengths (e.g., “cut to 2,000 mm ±2 mm”)
- Quantity (in metric tons or pieces)
- Surface finish preference
- Certification requirements (e.g., 3.1, PMI test, UT inspection)
- Destination port (for FOB/CIF pricing)
We support small trial orders as well as large-volume contracts for OEMs and EPC contractors worldwide.
FAQs
Q: Is ASTM A193 B16 magnetic?
A: Yes—it’s a ferritic alloy steel and exhibits magnetic properties.
A: Yes—it’s a ferritic alloy steel and exhibits magnetic properties.
Q: Can B16 be welded?
A: Welding is possible but requires preheating (～200–300°C) and post-weld heat treatment (PWHT) to avoid cracking. Consult a welding procedure specification (WPS).
A: Welding is possible but requires preheating (～200–300°C) and post-weld heat treatment (PWHT) to avoid cracking. Consult a welding procedure specification (WPS).
Q: What’s the difference between B7 and B16 bolts?
A: B7 (4140-based) is suitable up to ～400°C, while B16 (with added vanadium) offers better creep resistance above 450°C and is used in more severe thermal cycles.
A: B7 (4140-based) is suitable up to ～400°C, while B16 (with added vanadium) offers better creep resistance above 450°C and is used in more severe thermal cycles.
Q: Do you supply matching nuts?
A: Yes—we recommend ASTM A194 Grade 16 heavy hex nuts and ASTM F436 hardened washers for full system compatibility.
A: Yes—we recommend ASTM A194 Grade 16 heavy hex nuts and ASTM F436 hardened washers for full system compatibility.
Conclusion
For engineers and procurement professionals seeking reliable, high-temperature bolting solutions, ASTM A193 Grade B16 alloy round bar (20–350 mm diameter) represents the gold standard in performance and durability. With custom cutting services, full traceability, and global shipping capabilities, we ensure your project stays on schedule without compromising safety or quality.
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