Alloy Steel EN26 Round Bar
➡️ EN26 | EN 1.6745 | 40NiMoCr10-5 | 826M40
➡️ 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.:
1.6745
MTC Available:
EN 10204 3.1
Product Description for Alloy Steel EN26 Round Bar
Alloy Steel EN26 Round Bar is a high-nickel chromium-molybdenum high-tensile steel known in the British system as EN26 and in BS 970 as 826M40. It contains about 0.36–0.44% carbon, 2.30–2.80% nickel, 0.50–0.80% chromium and 0.45–0.65% molybdenum.
EN26 has the same alloy base as EN25 but higher carbon. This allows higher strength levels after hardening while still giving good toughness thanks to the high nickel content. The steel has very high hardenability and can reach high conditions in large sections.
EN26 is supplied hardened and tempered to BS 970 conditions, usually from V up to Y for highly stressed parts. It can also be surface hardened by nitriding.
EN26 bars are made hot rolled or forged, then peeled or turned, annealed or hardened and tempered.
Common applications include heavy-duty gears, shafts, crankshafts, high-strength bolts, aircraft parts and other components that need very high strength in large sections. No direct EN or ASTM equivalent has been identified, so buyers usually order to BS 970 826M40 or an agreed specification. EN26 is the higher-carbon partner of EN25. Where EN25 is chosen for maximum toughness, EN26 is chosen when the part also needs higher strength in a large section, for example heavy gears, crankshafts and high-strength bolts for mining and defence equipment. Like EN25, it is a special-order grade in most markets and is usually supplied as forged or hot rolled bar from specialist mills. Large bars are usually forged and ultrasonically tested, and buyers should agree the test positions, condition letter and certificate standard before production starts.
Common Applications of Alloy Steel EN26 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 EN26 Round Bar
Standard
Country / Region
Grade
SAE / AISI / ASTM
USA
AISI 4340 / ASTM A29 Grade 4340
EN
United Kingdom
EN 1.6745 (40NiMoCr10-4 / 40NiMoCr10-5)
JIS
Japan
JIS SNCM439
BS
United Kingdom
826M40
GB/T
China
40CrNi2MoA
KS
South Korea
KS SNCM439
AS
Australia
AS 1444 Grade X9940
AFNOR
France
40NCD10
UNI
Italy
40NiCrMo8-4 / 40NiMoCr10-4
Technical Specification for Alloy Steel EN26 Round Bar
Specification
Value
Unit
Material
Alloy steel
-
Grade
EN26 / 826M40
-
Standard
BS 970-3 (826M40)
-
Product Form
Round bar (hot rolled, forged or bright)
-
Diameter (supply range)
10–800 (forged)
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 hardened and tempered (conditions V to Y)
-
Tolerance Standard
EN 10060 (hot rolled), EN 10278 (bright, h9-h11), or as agreed
-
Carbon Equivalent CEV (IIW, calculated from mid-range analysis)
≈ 0.91
-
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 EN26 Round Bar
EN26 Round Bar is ordered to BS 970 as 826M40 in a named condition. As BS 970 is withdrawn and there is no direct EN grade, orders usually quote BS 970 limits as an agreed specification.
Hardening is normally done from about 820–850°C with oil quenching, followed by tempering to reach the required condition.
The very high hardenability allows high conditions in larger ruling sections than EN24.
EN26 has a very high carbon equivalent, so welding is avoided where possible. Forged EN26 bars are nearly always ultrasonically tested.
Because BS 970 is withdrawn, EN26 is usually ordered to BS 970 826M40 as an agreed specification. There is no direct modern EN grade. When a customer needs a standard grade, alternatives such as 34CrNiMo6 or 30CrNiMo8 may be offered, but their chemistry differs, so designer approval is needed. For conditions X and Y, parts are usually rough machined, hardened and tempered, then finish ground, to keep dimensions accurate and avoid machining very hard material. Ultrasonic testing and impact tests at stated positions are common requirements for large bars and forgings.
Hardness checks at both ends of each bar help confirm uniform response.
Chemical Composition for Alloy Steel EN26 Round Bar
Element
Symbol
Min
Max
Unit
Carbon
C
0.36
0.44
%
Silicon
Si
0.10
0.35
%
Manganese
Mn
0.45
0.70
%
Phosphorus
P
-
0.035
%
Sulfur
S
-
0.040
%
Chromium
Cr
0.50
0.80
%
Molybdenum
Mo
0.45
0.65
%
Nickel
Ni
2.30
2.80
%
Chemical Composition
View the chemical composition and applicable material limits for EN26 Round Bar
The table shows BS 970 limits for 826M40 (EN26).
Carbon at 0.36–0.44% gives higher strength than EN25 after hardening. Nickel at 2.30–2.80% keeps toughness high at these strength levels and adds hardenability.
Molybdenum at 0.45–0.65% strongly raises hardenability and reduces temper embrittlement. Chromium at 0.50–0.80% adds hardenability.
In EN26, manganese and silicon serve as deoxidisers. The only real difference from EN25 is carbon. At 0.36–0.44%, EN26 can reach higher hardness and strength after quenching, while the same 2.30–2.80% nickel keeps toughness good at these higher levels. Molybdenum at 0.45–0.65% makes the steel very deep hardening, so large sections harden well even in oil, and it also protects against temper embrittlement. Chromium at 0.50–0.80% adds some hardenability. Manganese at 0.45–0.70% adds a little hardenability to EN26. The higher carbon makes EN26 more prone to quench cracking than EN25, so part design and quenching should avoid sharp corners.
EN26 buyers often set tighter phosphorus and sulfur limits than BS 970. Because EN26 is used at high strength, low sulfur and good cleanliness improve fatigue life, and many buyers order vacuum-degassed steel for critical parts. Residual copper and tin should also be low.
Mechanical Properties for Alloy Steel EN26 Round Bar
Mechanical Property
Value
Unit
Tensile Strength (condition V)
1000–1150
MPa
Hardness (condition V)
293–352
HB
Tensile Strength (condition W)
1075–1225
MPa
Hardness (condition W)
311–375
HB
Tensile Strength (condition X)
1150–1300
MPa
Hardness (condition X)
341–401
HB
Tensile Strength (condition Y)
1225–1375
MPa
Hardness (condition Y)
363–429
HB
Mechanical Properties
Check the key mechanical properties and performance requirements of EN26 Round Bar
The values shown are BS 970 tensile and hardness ranges for EN26 in conditions V to Y. Each EN26 condition has a ruling section limit, with other properties set by condition and size.
EN26 reaches high strength in large sections while keeping useful toughness.
The EN26 certificate should list the condition letter, test position and full results. EN26 is usually heat treated to conditions V to Y, with tensile strength from 1000 MPa to 1375 MPa. Each condition has a limiting ruling section, and the deep hardenability of EN26 allows these conditions in larger sections than EN24. Yield strength, elongation and impact values also apply, and toughness falls as strength rises. For heavily loaded gears and shafts, fatigue strength is often the design limit, so surface finish, residual stress and nitriding should be considered. Ask the mill for full test results at the actual section.
Condition V gives 1000–1150 MPa and about 293–352 HB, while condition Y gives 1225–1375 MPa and about 363–429 HB. Impact tests at the service temperature are worth ordering for parts in cold service. Shot peening helps fatigue life.
Dimension / Sizes for Alloy Steel EN26 Round Bar
Dimension / Size
Value
Unit
Available Diameter Range (supply capability)
10–800 (forged, larger on request)
mm
Standard Length (random)
3–6
m
Custom / Cut-to-Length
Available on request
-
Diameter Tolerance
EN 10060 (hot rolled), EN 10278 (bright, h9-h11), or as agreed
-
Length Tolerance
Per ordered standard or as agreed (commonly +50 / -0 mm for cut lengths)
-
Straightness Tolerance
Per EN 10060 / EN 10278 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 EN26 Round Bar
Pricing for Alloy Steel EN26 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 EN26 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 EN26 or EN24?
What is the difference between EN26 and EN25?
Can EN26 reach high strength in large sections?
Is EN26 easy to find in stock?
How is EN26 heat treated, welded and machined?
What are the limits of EN26?
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