Alloy Steel 12Cr1MoV Round Bar
➡️ EN 1.7715 | 14MoV6-3 | ASTM A335 Grade P11
➡️ ASTM, EN, JIS & International Standards
➡️ Supply Conditions
➡️ Multiple Diameters & Supply Lengths
➡️ Global Export & International Delivery
Country of Origin:
Europe, Japan, USA
Material Type:
Alloy Steel
UNS Number:
-
Wr. No.:
1.7715
MTC Available:
EN 10204 3.1
Product Description for Alloy Steel 12Cr1MoV Round Bar
Alloy Steel 12Cr1MoV Round Bar is a low-carbon chromium-molybdenum-vanadium heat-resistant steel to the Chinese standard GB/T 3077. It contains about 0.08–0.15% carbon, 0.90–1.20% chromium, 0.25–0.35% molybdenum and 0.15–0.30% vanadium.
The grade is a pearlitic creep-resistant steel. Chromium, molybdenum and vanadium together give good creep strength and resistance to oxidation at elevated temperatures, usually up to about 540–580°C in steam service. The low carbon content gives good weldability and toughness.
The same steel type is widely used for boiler tubes and headers under the name 12Cr1MoVG in GB/T 5310. Round bars are used for forgings, flanges, fittings and machined parts in the same systems.
Bars are supplied hot rolled or forged, usually normalised and tempered. Forged 12Cr1MoV bars are often rough turned to remove scale.
Common applications include superheater and reheater parts, steam pipe fittings, flanges, valve parts, headers, fasteners and forgings for power plant boilers and petrochemical heaters. The nearest European grade is 14MoV6-3 (1.7715), which has lower chromium and higher molybdenum, so it is not a direct equivalent. It is one of the standard creep-resistant steels in Chinese power plant practice, used for parts at metal temperatures of about 540–580°C. Low carbon gives good weldability and toughness, while vanadium carbides give long-term structural stability. Many orders add elevated-temperature tensile tests. For bolts and studs, the steel must hold its clamp load for long periods, so relaxation data should be checked. Fittings welded to 12Cr1MoVG boiler tubes are usually ordered in this grade, so tube and fitting respond alike to post-weld heat treatment.
Common Applications of Alloy Steel 12Cr1MoV Round Bar
➡️ Machined shafts, spindles, valve stems, pump sleeves and pins for food, beverage, dairy and pharmaceutical equipment, where the passive chromium oxide film resists both product acids and caustic clean-in-place chemicals.
➡️ Fasteners, studs, bolts, threaded rod and anchor components produced from bar stock, chosen for corrosion resistance combined with the ductility needed for cold heading and thread rolling.
➡️ Chemical, water treatment and general process plant parts such as agitator shafts, flange blanks, nozzles and support components handling water, steam and mildly corrosive media free of significant chlorides.
➡️ Architectural and structural hardware including handrail stanchions, balustrade fittings, tension rods and bollards, where a bright ground or polished bar finish provides both appearance and low maintenance.
International Equivalent Grade for 12Cr1MoV Round Bar
Standard
Country / Region
Grade
ASTM / ASME
USA
ASTM A335 Grade P11
EN
Europe
EN 1.7715 (13CrMoV4-2)
GB
China
12Cr1MoV / A31132
KS
South Korea
KS D3756 / KS D3569
JIS
Japan
JIS G4053 / JIS G4109
GOST
Russia
12Kh1MF (12Х1МФ)
Technical Specification for Alloy Steel 12Cr1MoV Round Bar
Specification
Value
Unit
Material
Alloy steel
-
Grade
12Cr1MoV
-
Standard
GB/T 3077
-
Product Form
Round bar (hot rolled, forged or bright)
-
Diameter (supply range)
10–500
mm
Length (random)
3–6
m
Manufacturing Process
Hot rolled or forged, optional peeling, turning, cold drawing or grinding
-
Production Route
EAF or BOF + ladle refining + vacuum degassing
-
Surface Finish
Black, shot blasted, peeled, turned, cold drawn or ground
-
Heat Treatment / Delivery Condition
Normalised and tempered
-
Tolerance Standard
GB/T 702 (hot rolled bars) or GB/T 908 (forged bars), or as agreed
-
Carbon Equivalent CEV (IIW, calculated from mid-range analysis)
≈ 0.52
-
Density
7.85
g/cm³
Thermal Conductivity at 20°C
42
W/m·K
Coefficient of Thermal Expansion 20–100°C
11.5
µm/m·K
Specific Heat at 20°C
460
J/kg·K
Modulus of Elasticity at 20°C
210
GPa
Magnetic Properties
Ferromagnetic
-
Testing / Inspection
Chemical analysis, hardness, tensile and impact where specified, UT (EN 10308 / SEP 1921 / ASTM A388), grain size, Jominy on request
-
Certification
EN 10204 3.1 mill test certificate (3.2 on request)
-
Technical Specifications
Get the key technical specifications for Alloy Steel 12Cr1MoV Round Bar
Alloy Steel 12Cr1MoV Round Bar is ordered to GB/T 3077, with bar tolerances in GB/T 702 or GB/T 908. For boiler tube systems, the tube version is 12Cr1MoVG to GB/T 5310.
The standard mechanical properties are measured on a 30 mm test blank after normalising at about 970°C with air cooling and tempering at about 750°C with air cooling. This normalised and tempered condition gives the best creep resistance.
The low carbon equivalent gives good weldability, although preheat and post-weld heat treatment are normally used for pressure parts.
Physical data for 12Cr1MoV are reference values for creep-resistant low-alloy steel. For pressure service, additional tests such as elevated temperature tensile tests, UT and third-party inspection are often ordered.
The bar grade 12Cr1MoV in GB/T 3077 and the boiler tube grade 12Cr1MoVG in GB/T 5310 share almost the same chemistry, but they are covered by different standards with different tests. Fittings and forgings that are welded to 12Cr1MoVG tubes are often ordered with extra requirements taken from the tube standard, such as tighter residual element limits and high-temperature yield strength. There is no direct EN or ASTM equivalent. The nearest European grade is 14MoV6-3 (1.7715), which has lower chromium. For export, keep the GB/T designation on the certificate and agree any additional tests before production.
Chemical Composition for Alloy Steel 12Cr1MoV Round Bar
Element
Symbol
Min
Max
Unit
Carbon
C
0.08
0.15
%
Silicon
Si
0.17
0.37
%
Manganese
Mn
0.40
0.70
%
Phosphorus
P
-
0.030
%
Sulfur
S
-
0.030
%
Chromium
Cr
0.90
1.20
%
Molybdenum
Mo
0.25
0.35
%
Vanadium
V
0.15
0.30
%
Chemical Composition
View the chemical composition and applicable material limits for 12Cr1MoV Round Bar
The table shows the GB/T 3077 limits for 12Cr1MoV in the high-quality grade.
Carbon is kept at 0.08–0.15% for good weldability and toughness. Chromium at 0.90–1.20% improves oxidation resistance and structural stability at temperature.
Molybdenum at 0.25–0.35% strengthens the ferrite and raises creep strength. Vanadium at 0.15–0.30% forms fine, stable carbides that resist coarsening at service temperature, which gives long-term creep resistance.
Silicon and manganese in 12Cr1MoV serve as deoxidisers. Phosphorus and sulfur are kept low to protect toughness and weld quality. Vanadium carbides are the key to long-term creep strength. At service temperatures of about 540–580°C, ordinary iron and chromium carbides slowly coarsen, and the steel loses strength over thousands of hours. Vanadium carbides are much more stable, so they keep holding the structure together for a long time. Molybdenum at 0.25–0.35% dissolves in the ferrite and slows down creep. Chromium at 0.90–1.20% improves resistance to steam oxidation and helps keep carbides stable. Manganese at 0.40–0.70% and silicon at 0.17–0.37% deoxidise the steel. Low carbon also means the steel is less likely to crack in the heat-affected zone after welding. Residual copper and nickel should be kept low for creep service.
Mechanical Properties for Alloy Steel 12Cr1MoV Round Bar
Mechanical Property
Value
Unit
Tensile Strength Rm (GB/T 3077, 30 mm blank, N+T)
≥ 490
MPa
Yield Strength ReL (GB/T 3077, N+T)
≥ 245
MPa
Elongation A (GB/T 3077, N+T)
≥ 22
%
Reduction of Area Z (GB/T 3077, N+T)
≥ 50
%
Impact Energy KU2 (GB/T 3077, N+T)
≥ 71
J
Hardness (annealed or high-temperature tempered)
≤ 179
HBW
Mechanical Properties
Check the key mechanical properties and performance requirements of 12Cr1MoV Round Bar
The values shown are GB/T 3077 minimum requirements for 12Cr1MoV on a 30 mm test blank after normalising at about 970°C and tempering at about 750°C. The 71 J impact value for 12Cr1MoV is a KU2 U-notch result.
The grade has moderate room-temperature strength and high toughness. Its main value is creep strength at elevated temperature, which should be taken from creep data rather than room-temperature tests.
In the delivery condition, hardness is limited to 179 HBW. For pressure parts, buyers should also specify elevated temperature properties where needed. GB/T 3077 requires 12Cr1MoV to reach tensile strength of at least 490 MPa, lower yield strength of at least 245 MPa, elongation of at least 22%, reduction of area of at least 50% and U-notch impact energy of at least 71 J on the 30 mm test blank. These room-temperature values are much lower than for quenched and tempered steels, because the grade is designed for creep resistance, not maximum strength. For pressure design, use the allowable stresses in the relevant Chinese boiler or pressure vessel code, which are based on creep rupture data at the service temperature. Hardness checks after welding and post-weld heat treatment help confirm that weld zones are not too hard.
Dimension / Sizes for Alloy Steel 12Cr1MoV Round Bar
Dimension / Size
Value
Unit
Available Diameter Range (supply capability)
10–500 (forged sizes on request)
mm
Standard Length (random)
3–6
m
Custom / Cut-to-Length
Available on request
-
Diameter Tolerance
GB/T 702 (hot rolled) or GB/T 908 (forged), or as agreed
-
Length Tolerance
Per ordered standard or as agreed (commonly +50 / -0 mm for cut lengths)
-
Straightness Tolerance
Per GB/T 702 / GB/T 908 or as agreed
-
End Condition
Saw cut square, chamfered or as ordered
-
Surface Finish
Black (as rolled or forged), shot blasted, peeled, rough turned, cold drawn, centreless ground
-
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for 12Cr1MoV Round Bar
Pricing for Alloy Steel 12Cr1MoV Round Bar
Round Bar Prices are generally quoted per kilograms or meters tonnes and can fluctuate with the global raw material and market prices. The final price will depend on a variety of factors, including the grade size, diameter, length, surface finish, the quantity and whether the bars are cut to length or in standard lengths.
For smaller quantities, we can also quote per metre or per piece basis once the required dimensions have been confirmed. Container-loads or orders that are larger in size are typically priced per tonne, based upon the specifications required and the supply conditions.
Please provide your desired dimensions, grades, length number, and end for a current quote including the lead time applicable and details for certification.
Pricing
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Why Choose Us
Euro Steel Bars is an international distributor, stockist and exporter of stainless round steel bars that cover carbon, stainless alloy, special grades. We stock a variety of sizes and grades. We guarantee every order with mill test certificates as well as full quality-assurance documentation. Our name speaks to our roots: European-sourced materials that is backed by the certificates and rigor that buyers from Asia as well as the Gulf and Africa are looking for.
Each bar we deliver is accompanied by EN 10204 3.1 mill test certificates as well as complete documentation of quality, so what you receive corresponds to what’s written in the documents. We carry a selection of sizes and grades ready for transport, and cut length upon the request of customers, which results in quicker lead times, whether you’re ordering just a one-off spec or a complete project tonnage.
We operate an actual wholesale business that is that is supported with an internationally-operated supply chain therefore we are able to serve fabricators sourcing one grade the same way in the same way as an EPC contractor who is placing a large order. Our clients include manufacturers, fabricators EPC construction companies, engineers oil and gas projects as well as construction companies. we design our inventory as well as documentation to show what buyers need to bring projects forward.
Our customers trust us across Qatar, Oman, Bahrain, Kuwait, Jordan, Malaysia, Singapore, Thailand, Taiwan, Turkey, Italy and South Africa. If you’re looking to source an Gulf energy project, or a construction project within Southeast Asia, you get the same quality of certified material, the exact documentation, and the exact delivery procedure.
Frequently Asked Questions
Should I choose 12Cr1MoV or 15CrMo?
What temperature can 12Cr1MoV be used at?
What is the difference between 12Cr1MoV and 12Cr1MoVG?
Does 12Cr1MoV have an international equivalent?
How is 12Cr1MoV heat treated, welded and machined?
What are the limits of 12Cr1MoV?
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