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30CrNiMo8 Alloy Steel Round Bar Hot Rolled with Diameter 10-320mm for Structural Applications

Minimum Order Quantity	500 kg
Price	US $7.15-8.78 / kg

Product Details

Diameter	10 - 320mm	Length	6m Or Custom
Technique	Hot Rolled	Surface Treatment	Black
Carbon Content	0.26-0.34%	Chromium Content	1.80-2.20%
Manganese Content	0.50-0.80%	Molybdenum Content	0.30-0.50%
Nickel Content	1.80-2.20%	Phosphorus Content	0.025% Max
Sulfur Content	0.035% Max	Silicon Content	0.40% Max
Tensile Strength	800-1450 N/mm2	Yield Strength	590-1050 N/mm2
Elongation	9-12%
Highlight	30CrNiMo8 Alloy Steel Round Bar , Hot Rolled Alloy Steel Rod , Diameter 10-320mm Steel Round Bar

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Product Description

EN 30CrNiMo8 Alloy Steel Round Bar

High-quality alloy steel round bars available in diameters from 10mm to 320mm, designed for structural and industrial applications requiring superior strength and durability.

Product Specifications

Diameter Range	10 - 320mm
Standard Length	6 meters (custom cutting available)
Manufacturing Type	Hot Rolled
Available Brands	BAOSTEEL, DELTA, DONGBEI, HUAXI, SHAGANG
Minimum Order Quantity	1 Ton
Loading Port	Shanghai Port
Packing	Secured with steel wire rope
Delivery Time	5-7 days for stock materials
Standards	ASTM, GB, EN, DIN
Application	Structure and Industrial

Available Standard Diameters

10, 12, 15, 18, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 120, 130, 140, 150, 160, 180, 200, 210, 220, 230, 250, 270, 300mm

Material Overview

30CrNiMo8 alloy steel is engineered for wrought product formation, offering exceptional structural integrity for heavy-duty components. This medium-hardenability steel provides high elasticity and strength, with maximum softened hardness of 248 HRB. It demonstrates excellent resistance to impacts and loads, though welding requires preheating preparation.

Chemical Composition

Element	Content (%)
Carbon (C)	0.26-0.34
Chromium (Cr)	1.80-2.20
Manganese (Mn)	0.50-0.80
Molybdenum (Mo)	0.30-0.50
Nickel (Ni)	1.80-2.20
Phosphorus (P)	0.025 max
Sulfur (S)	0.035 max
Silicon (Si)	0.40 max

Mechanical Properties

Dimensions <16mm: Tensile strength 1250-1450 N/mm², Yield strength >1050 N/mm², Elongation >9%, Necking >40%
Dimensions 16-40mm: Tensile strength 1250-1450 N/mm², Yield strength >1050 N/mm², Elongation >9%, Necking >40%
Dimensions 40-100mm: Tensile strength 1100-1300 N/mm², Yield strength >900 N/mm², Elongation >10%, Necking >45%, Impact strength >35 J
Dimensions 100-160mm: Tensile strength 1000-1200 N/mm², Yield strength >800 N/mm², Elongation >11%, Necking >50%, Impact strength >45 J
Dimensions 160-330mm: Tensile strength >850 N/mm², Yield strength >630 N/mm², Elongation >12%, Impact strength >45 J
Dimensions >330mm: Tensile strength >800 N/mm², Yield strength >590 N/mm², Elongation >12%, Impact strength >40 J

Heat Treatment Processes

Softening annealing: 640-680°C
Normalizing annealing: 840-860°C
Hardening with oil cooling: 815-845°C
Tempering with air cooling: 550-650°C

Forging Parameters

Forming temperature: 1560-1920°F (850-1050°C)
Normalizing temperature: 1560-1600°F (850-870°C)
Hardening temperature: 1000-1250°F (540-680°C) followed by oil quench

Applications

30CrNiMo8 alloy steel is primarily used in automotive and mechanical engineering components that require optimum toughness and strength under severe dynamic stress conditions.

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