Alloy Steel 35CrMoV Round Bar
➡️ UNS K14072 | EN 1.7711 | 40CrMoV4-6 | ASTM A193 B16
➡️ 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:
K14072
Wr. No.:
1.7711
MTC Available:
EN 10204 3.1
Product Description for Alloy Steel 35CrMoV Round Bar
Alloy Steel 35CrMoV Round Bar is a chromium-molybdenum-vanadium alloy structural steel to the Chinese standard GB/T 3077. It contains about 0.30–0.38% carbon, 1.00–1.30% chromium, 0.20–0.30% molybdenum and 0.10–0.20% vanadium.
Vanadium forms fine carbides that refine grain size and raise strength and resistance to softening at temperature. Combined with chromium and molybdenum, this gives high strength and good toughness after quenching and tempering, and useful strength at moderately high temperatures.
The grade is used for heavily loaded parts in machinery, power generation and pressure equipment. It has good hardenability for medium sections and good resistance to temper embrittlement.
Bars are supplied hot rolled or forged, in annealed or quenched and tempered condition. 35CrMoV bars are usually peeled or turned before machining.
Common applications include high-strength shafts, turbine rotor parts, gears, high-pressure vessel parts, bolts and studs for elevated temperature, and other heavy-duty components. No direct equivalent has been identified in ASTM, EN or JIS standards, so buyers outside China should order to GB/T 3077 or agree the chemistry and properties with the mill. The vanadium addition sets 35CrMoV apart from 35CrMo. It refines the grain and resists softening, so the steel suits highly stressed parts that run warm, such as compressor shafts and blower rotors. Service temperatures up to about 500°C are commonly quoted, with the real limit set by creep data. Drawings for equipment built to Chinese standards call it by name. Bars above about 100 mm are normally forged, and buyers should agree test positions for large shafts, because the core will not match the 25 mm test-blank values.
Common Applications of Alloy Steel 35CrMoV 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 35CrMoV Round Bar
Standard
Country / Region
Grade
UNS
USA
UNS K14072
ASTM / ASME
USA
ASTM A193 Grade B16
EN
Europe
EN 1.7711 (40CrMoV4-6 / 40CrMoV47)
GB/T 3077
China
35CrMoV / 35CrMoVA
JIS
Japan
JIS SNB16
KS
South Korea
KS SNB16
IS
India
40CrMoVH
BS
United Kingdom
40CrMoV4-6 / BS 1506-671
Technical Specification for Alloy Steel 35CrMoV Round Bar
Specification
Value
Unit
Material
Alloy steel
-
Grade
35CrMoV
-
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
Annealed or quenched and tempered as ordered
-
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)
≈ 0.74
-
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 35CrMoV Round Bar
Alloy Steel 35CrMoV Round Bar is ordered to GB/T 3077. Rolled 35CrMoV bars follow GB/T 702 tolerances, and forged bars follow GB/T 908.
The standard mechanical properties are measured on a 25 mm test blank after quenching at about 900°C in oil and tempering at about 630°C. Large 35CrMoV shafts will test lower than the 25 mm blank.
Bars are usually supplied annealed for machining, with a maximum hardness set by the standard, or quenched and tempered.
Because 35CrMoV has a high carbon equivalent, welds need preheat and post-weld heat treatment. Physical data for 35CrMoV are reference values. Ultrasonic testing and third-party inspection of 35CrMoV bars are available.
35CrMoV has no direct equivalent in EN, ASTM or JIS standards. The nearest grades in use are Cr-Mo-V steels such as 21CrMoV5-7 for bolting and some rotor forging grades, but their chemistry and properties differ. For export orders, state GB/T 3077 and the quality level, and include the Chinese grade number on the certificate. Heat treatment on the 25 mm test blank uses a high quenching temperature of about 900°C, which is needed to dissolve the vanadium carbides. For large forged shafts, add ultrasonic testing, grain size and impact tests at agreed positions, because properties in thick sections will be lower than the test-blank values.
Chemical Composition for Alloy Steel 35CrMoV Round Bar
Element
Symbol
Min
Max
Unit
Carbon
C
0.30
0.38
%
Silicon
Si
0.17
0.37
%
Manganese
Mn
0.40
0.70
%
Phosphorus
P
-
0.030
%
Sulfur
S
-
0.030
%
Chromium
Cr
1.00
1.30
%
Molybdenum
Mo
0.20
0.30
%
Vanadium
V
0.10
0.20
%
Chemical Composition
View the chemical composition and applicable material limits for 35CrMoV Round Bar
The table shows the GB/T 3077 limits for 35CrMoV in the high-quality grade. Tighter phosphorus and sulfur limits apply to A and E grades if ordered.
Carbon at 0.30–0.38% gives high strength after hardening. Chromium at 1.00–1.30% raises hardenability and resistance to softening.
Molybdenum at 0.20–0.30% improves hardenability, creep strength and resistance to temper embrittlement. Vanadium at 0.10–0.20% forms fine, stable carbides that refine grain size and increase strength and tempering resistance.
Silicon in 35CrMoV deoxidises the melt. Phosphorus and sulfur are kept low to protect toughness. Vanadium at 0.10–0.20% is the key element. It forms fine vanadium carbides and carbonitrides that pin grain boundaries during heating, so the steel keeps a fine grain even at the high austenitising temperature of about 900°C. These carbides also resist coarsening during tempering at about 630°C, which is why strength stays high after tempering and at service temperatures. Chromium at 1.00–1.30% is a little higher than in 35CrMo and adds hardenability and resistance to oxidation. Molybdenum at 0.20–0.30% is also higher than in 35CrMo, which improves creep strength. Manganese at 0.40–0.70% is kept moderate. Together, these elements give a steel that holds strength better than Cr-Mo grades without vanadium.
Mechanical Properties for Alloy Steel 35CrMoV Round Bar
Mechanical Property
Value
Unit
Tensile Strength Rm (GB/T 3077, 25 mm blank, Q&T)
≥ 1080
MPa
Yield Strength ReL (GB/T 3077, Q&T)
≥ 930
MPa
Elongation A (GB/T 3077, Q&T)
≥ 10
%
Reduction of Area Z (GB/T 3077, Q&T)
≥ 50
%
Impact Energy KU2 (GB/T 3077, Q&T)
≥ 71
J
Hardness (annealed or high-temperature tempered)
≤ 241
HBW
Mechanical Properties
Check the key mechanical properties and performance requirements of 35CrMoV Round Bar
The values shown are GB/T 3077 minimum requirements for 35CrMoV on a 25 mm test blank after quenching at about 900°C in oil and tempering at about 630°C. The 35CrMoV impact value uses the GB/T U-notch (KU2) specimen.
The steel reaches very high strength with good toughness. Vanadium keeps strength high after tempering and helps at moderately high service temperatures.
In the annealed condition, hardness is limited to 241 HBW for machining. Properties in large sections are lower, so the required values should be agreed for the actual size. GB/T 3077 requires 35CrMoV to reach tensile strength of at least 1080 MPa, lower yield strength of at least 930 MPa, elongation of at least 10%, reduction of area of at least 50% and U-notch impact energy of at least 71 J on the 25 mm test blank. These are among the highest strength values in the Cr-Mo steel group. For shafts at elevated temperature, room-temperature strength is only a starting point. Designers should use creep and stress-relaxation data at the service temperature. Hardness checks along large shafts help confirm even heat treatment.
Temper embrittlement can occur in slow cooling from tempering.
Dimension / Sizes for Alloy Steel 35CrMoV Round Bar
Dimension / Size
Value
Unit
Available Diameter Range (supply capability)
10–600 (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 35CrMoV Round Bar
Pricing for Alloy Steel 35CrMoV 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
Get current Alloy Steel 35CrMoV Round Bar pricing based on size, quantity, grade, finish, and delivery requirements.
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 35CrMoV or 35CrMo?
What is the difference between 35CrMoV and 35CrMo?
Does 35CrMoV have an international equivalent?
Why does 35CrMoV need a high quenching temperature?
How is 35CrMoV heat treated, welded and machined?
What are the limits of 35CrMoV?
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