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25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
Specifications
Brand Name :
DELTA
Model Number :
DIN 1.8159 (25CrMoV6-4) / 25Cr2MoVA
Certification :
ISO
Place of Origin :
China
MOQ :
1 Ton
Price :
600-850 USD/Ton
Payment Terms :
L/C, T/T, Western Union
Supply Ability :
20Ton per week
Delivery Time :
5 - 12 days based on the quantity
Packaging Details :
standard packing for export
Products Name :
Alloy Steel Round Bar
Diameter :
10 - 300mm
Length :
6m
Tech :
Hot rolled
Service :
Cutting
MOQ :
1 Ton
Loading Port :
Shanghai Port
Standard :
ASTM EN GB
Description

25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length

Products Specification

Products Name

25Cr2MoVA Alloy Steel Round Bar

Diameter

10 - 300 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, 31CrMoV9

Standard

ASTM GB EN DIN

Application

Structure and Industrial

Standard Size of our Steel Round Bar In Stock

10mm 12mm 15mm 16mm 18mm 20mm
25mm 30mm 35mm 38mm 40mm 42mm
45mm 48mm 50mm 55mm 60mm 65mm
70mm 75mm 80mm 85mm 90mm 95mm
105mm 110mm 115mm 120mm 130mm 140mm
150mm 160mm 170mm 180mm 190mm 200mm
210mm 220mm 230mm 240mm 250mm 260mm
270mm 280mm 290mm 300mm 310mm 320mm
25Cr2MoVA / DIN 1.8159 Alloy Steel Round Bar – Hot Rolled, Ø20–350mm, Standard 6m Length | High-Temperature Strength for Power & Petrochemical Applications

Product Overview

Our 25Cr2MoVA (equivalent to DIN 1.8159) alloy steel round bar is a premium-grade, chromium-molybdenum-vanadium low-alloy steel engineered for exceptional mechanical strength and long-term stability at elevated temperatures—up to 550°C (1022°F). Supplied in hot-rolled condition with diameters ranging from 20 mm to 350 mm and standard 6-meter lengths, this material is ideal for critical components in power generation, oil & gas, heavy machinery, and high-pressure systems.
While 25Cr2MoVA is the Chinese designation per GB/T 3077, its chemical and mechanical profile closely aligns with the European DIN 1.8159 (25CrMoV6-4) specification, making it a globally recognized solution for demanding engineering applications requiring superior creep resistance, fatigue strength, and hardenability.
All bars are produced under strict quality control, fully traceable by heat number, and available with EN 10204 3.1/3.2 mill test reports upon request.

Key Advantages

✅ High tensile & yield strength even after prolonged exposure to high temperatures
✅ Excellent anti-creep properties – maintains integrity under stress at 510–550°C
✅ Good hardenability due to synergistic Cr-Mo-V microalloying
✅ Suitable for nitriding – achieves surface hardness up to 600–700 HV for wear resistance
✅ Hot-rolled finish – cost-effective for large-diameter stock; ready for further machining or forging
✅ Standard 6m length – optimizes logistics and reduces handling costs
✅ Full compliance with GB/T 3077 and functional equivalence to DIN 1.8159

Typical Applications

  • Steam turbine bolts, nuts, and studs (main steam lines, casing fasteners)
  • High-pressure valve stems and spindles
  • Rotor shafts, sleeves, and couplings in thermal power plants
  • Critical fasteners in petrochemical reactors and refineries
  • Forging blanks for gears, axles, and structural components requiring post-heat treatment

Chemical Composition (GB/T 3077 & DIN 1.8159 Comparison)

Element 25Cr2MoVA (GB/T 3077) DIN 1.8159 (25CrMoV6-4)
Carbon (C) 0.22 – 0.29% 0.22 – 0.29%
Silicon (Si) 0.17 – 0.37% 0.10 – 0.35%
Manganese (Mn) 0.40 – 0.70% 0.40 – 0.70%
Chromium (Cr) 1.50 – 1.80% 1.50 – 1.80%
Molybdenum (Mo) 0.25 – 0.35% 0.25 – 0.35%
Vanadium (V) 0.15 – 0.30% 0.10 – 0.20%
Phosphorus (P) ≤ 0.035% ≤ 0.025%
Sulfur (S) ≤ 0.035% ≤ 0.025%
Note: Minor differences exist in V and residual element limits, but performance in service is functionally equivalent.

Mechanical Properties (After Recommended Q&T: 900°C Oil Quench + 640°C Temper)

Property Minimum Value
Tensile Strength (Rm) ≥ 930 MPa
Yield Strength (Rp0.2) ≥ 785 MPa
Elongation (A5) ≥ 14%
Reduction of Area (Z) ≥ 55%
Charpy Impact (20°C) ≥ 63 J
Hardness (HBW, Q&T) 269 – 321
Hardness (HBW, As-Hot-Rolled) ～200–240
As-supplied hot-rolled bars are typically delivered in normalized or controlled-cooling condition. Final quenching & tempering is performed by the end user based on application requirements.

Product Specifications

Parameter Details
Material Grade 25Cr2MoVA (GB/T 3077) / Equivalent to DIN 1.8159
Form Hot-rolled round bar
Diameter Range 20 mm – 350 mm
Standard Length 6 meters (±50 mm tolerance)
Custom Lengths Available upon request (min. order applies)
Surface Condition Black oxide scale (hot-rolled finish); optional shot blasting
Straightness ≤ 3 mm/m (typical for hot-rolled)
Heat Treatment As-rolled or normalized; Q&T available as value-added service
Certification Mill Test Report (MTR), EN 10204 3.1, chemical & mechanical data
Packaging Bundled with steel strapping, marked with grade, heat no., dimensions
Lead Time 10–30 days (depending on size and quantity)

Processing & Fabrication Guidance

  • Machining: Best performed after annealing or high-temp tempering (HB ≤ 240). Use rigid setups and sharp carbide tools.
  • Heat Treatment:
    • Normalizing: 880–910°C, air cool
    • Quenching: 880–910°C, oil quench
    • Tempering: 600–660°C, rapid air cooling through 550–450°C to avoid temper brittleness
  • Nitriding: Achieves case depth of 0.3–0.6 mm with surface hardness >600 HV—ideal for valve stems and wear parts.
  • Forging: Recommended temperature range: 1150–850°C; avoid forging below 800°C.

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25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length

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Product Detail
Brand Name :
DELTA
Model Number :
DIN 1.8159 (25CrMoV6-4) / 25Cr2MoVA
Certification :
ISO
Place of Origin :
China
MOQ :
1 Ton
Price :
600-850 USD/Ton
Contact Supplier
video
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length
25Cr2MoVA / DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m Length

JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

Verified Supplier
4 Years
jiangsu, wuxi
Business Type :
Manufacturer, Distributor/Wholesaler, Exporter
Main Products :
stainless steel roofing sheet, Stainless Steel Strip, Others stainless steel sheet
Total Annual :
>1000000
Employee Number :
>100
Certification Level :
Verified Supplier
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