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

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

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

MOQ： 1 Ton
Price： 600-850 USD/Ton
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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
Brand Name	DELTA
Model Number	DIN 1.8159 (25CrMoV6-4) / 25Cr2MoVA
Certification	ISO
Place of Origin	China

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Product Details
Company Details

Product Specification


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
Brand Name	DELTA	Model Number	DIN 1.8159 (25CrMoV6-4) / 25Cr2MoVA
Certification	ISO	Place of Origin	China
High Light	25Cr2MoVA alloy steel round bar ，DIN1.8159 hot rolled steel bar ，6m length alloy steel bar

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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Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...

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