What type of steel pipe is referred to as 40CrNiMo pipe:

40CrNiMo steel pipe features high strength and toughness, excellent hardenability and resistance to overheating, but is highly sensitive to white spots and has temper brittleness. Its weldability is poor, requiring preheating at high temperatures before welding and stress relief after welding. It should be used after tempering.

(2) What is the application of 40CrNiMo steel pipe?

Primarily used for high-strength components such as aircraft engine shafts, shafts, gears, and fasteners, etc.

Typically, critical parts with high strength and good plasticity are processed, as well as special performance required parts after nitriding, such as shafts, gears, fasteners, and the like.

(3) What are the chemical compositions of 40CrNiMo steel pipes?

Carbon C 0.37~0.44

Silicon Si 0.17~0.37

Manganese Mn 0.50～0.80

Sulfur (S) permitted residual content ≤ 0.025

Phosphorus P: Allowable residue content ≤ 0.025

Chromium Cr 0.60～0.90

Nickel Ni 1.25～1.65

Copper Cu: Allowable residual content ≤ 0.25

Molybdenum Mo 0.15~0.25

(4) What are the mechanical properties of 40CrNiMo steel pipe?

Tensile Strength σb (MPa): ≥980 (100)

Yield Strength σs (MPa): ≥835 (85)

Tensile elongation δ5 (%): ≥12

Section reduction ratio ψ (%): ≥55

Impact Energy Aku (J): ≥78

Impact toughness value αkv (J/cm2): ≥98(10)

Sample Size: Sample blank size is 25mm

Heat Treatment: Quenching at 850 degrees; Cooling medium: oil; Tempering temperature at 600 degrees; Cooling medium: water, oil.

(5) Heat treatment temperature for 40CrNiMo steel pipe:

Quench at 850°C, oil cooled; temper at 600°C, water and oil cooled

(6) Delivery Status of 40CrNiMo Steel Pipe:

Delivered in heat treated (normalizing, annealing, or high-temperature tempering) or non-heat treated condition. Steel supplied in annealing or high-temperature tempering condition with Brinell hardness GBW ≤ 269.

Sales Hotline:18265509689 (WeChat same number)Liaocheng Yiding Metal Materials Co., Ltd. has earned the trust of numerous steel customers over eleven years with its solid reputation, robust capabilities, superior products, competitive prices, and people-oriented services.

We specialize in and sell seamless tubes with outer diameters ranging from 10mm to 856mm and wall thicknesses from 1mm to 80mm. We can also hot expand tubes to diameters of 219mm to 1020mm and wall thicknesses up to 6mm to 60mm, as per customer specifications.

Products are applied in various industrial fields such as engineering, coal mining, textiles, electricity, boilers, machinery, and more!

Our company also regularly sells materials:

Alloy steel pipes: 40CRNIMO, 30crmo, Q345B, Q345C, Q345D, Q345E, 20G, 40Cr, 20Gr, 16Mn-45Mn, 27SiMn, 12CrMo(T12), 12Cr1MoV, 10CrMo910, T91, 15CrMo, 35CrMo, 40CrMo, etc.

Carbon Steel Pipe: 10#, 15#, 25#, 30#, 35#, 50#, 55#, 60#

Bearings Steel Tubes: GCR15 Steel Tube, GCR15SIMN Steel Tube

Mold Steel Tubes: CR12MOV steel tube, H13 steel tube, CR12 steel tube

High-Strength Steel Pipe: Q420 steel pipe, Q390 steel pipe, Q460 steel pipe, Q550 steel pipe

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   Sales Phone: 18265509689 (same as WeChat), Landline: 0635-7070151, Fax: 0635-7070152