40CrNiMoA Alloy Steel Round Bar Custom Cutting Any Length Hot Rolled and Forged Round Bars

Products Specification

40CrNiMoA Steel

40CrNiMoA steel is a Chinese alloy steel, has high strength, toughness and good hardenability, and has anti-overheating stability, but has high white point sensitivity, temper brittleness and poor weldability. Preheating is required before welding, and stress relief treatment is required after welding.

Properties and Applications of 40CrNiMoA Alloy Steel

40CrNiMoA steel is used after quenching and tempering, and is used to manufacture important parts requiring good plasticity, high strength and large size. For example, heavy-duty shafts in heavy-duty machines, steam turbine shafts with diameters greater than 250 mm, blades, transmissions, fasteners, crankshafts, gears, etc., can also be used for rotor shafts and blades operating at temperatures exceeding 400 °C.

40CrNiMo, 40CrNiMoA Steel Chemical Composition

40CrNiMoA Alloy Steel Mechanical Properties

• Yield strength: ≥ 835 MPa
• Tensile strength: ≥ 980 MPa
• Elongation: ≥12%
• Rate of reduction in area: ≥55%
• Impact absorbing energy: ≥ 78 J
• Material Brinell Hardness: ≤ 269 (Annealed or high temperature tempered steel rod)
• Sample size: 25mm

Heat treatment specification

• First quenching heating temperature: 850 °C (Quenchant– oil)
• Tempering heating temperature: 600 °C (Quenchant– water, oil)

Equal Grade of 40CrNiMoA Alloy

• Germany: 34CrNiMo6
• United States: 4340
• Japan: SNCM439 (SNCM8)
• United Kingdom: 817M40
• Italy: 40NiCrMo7

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 pipe best-selling consumer market. Without our products among consumers enjoy a higher status, the company with a number of retailers and agents to establish a long-term stable cooperative relationship. Our distribution of stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe variety complete, reasonable price. The strength of the company, heavy credit, abide by the contract, ensure product quality, with a variety of management characteristics and the principle of small profits, to win the trust of our customers.