15CrMo T15 P15 Steel Round Steel Bar for Component

Diameter 10-800mm as your request
Length 1-9m or As Customers’ Requirement
Heat treatment Normalized / Annealed / Quenched / tempered
Surface black,mill,polished,brush,etc
Usage Structural Steel Bar
Place of Origin Tianjin China
MOQ 5 ton
Supply Ability 5000 tons / month
Delivery time Within 30 Days
Payment Terms T/T , L/C

15CrMo Steel Bar

15crmo is an alloy structural steel, which is composed of carbon, silicon and other alloying elements. 15crmo steel belongs to heat-resistant steel, and it still has high strength, machinability and so on in the environment of 500-550 ℃. 15crmo steel has the advantages of high strength, high toughness, and good corrosion resistance. This type of steel can be used to make various important parts, such as gears, crankshafts, seamless pipes, etc.

15CrMo features

Low-alloy heat-resistant steel, stronger than 12CrMo steel, toughness slightly lower, at 500-550 ° C or less have a higher heat resistance and oxidation resistance, and good mechanical properties, machinability and cold strain plasticity good weldability fair. Mainly used for the production of various caliber seamless steel pipe and sheet.



15CrMo steel chemical composition

Grade 15CrMo steel chemical composition (mass fraction) ( % )
C Mn Si Cr Mo Ni Nb + Ta S P
15CrMo 0.12 ~ 0.18 0.40 ~ 0.70 0.17 ~ 0.37 0.80 ~ 1.10 0.40 ~ 0.55 ≤0.30 _ ≤0.035 ≤0.035


Compared with other materials, 15CrMoA alloy steel has the advantages of higher tensile strength, excellent toughness, good heat resistance and lower alloy cost. Compared with other materials, 15CrMoA alloy steel has the advantages of higher tensile strength, excellent toughness, good heat resistance and lower alloy cost. In addition, 15CrMoA alloy steel also has good welding performance and corrosion resistance, and is widely used in automotive, aerospace, chemical, electric power, oil and gas and other fields.

15CrMo round bar mechanical

tensile strengthσb (MPa):≥440(45)
yield strength σs (MPa):≥295(30)
extensibility δ5 (%):≥22
reduction of area ψ (%):≥60
ballistic work Akv (J):≥94
notched bar impact strength αkv (J/cm2):≥118(12)
rigidity :≤179HB
specimen size:specimen size of rough30mm


Ⅰ. Classified by process

Round steel is divided into three types: hot rolled, forged and cold drawn. The specifications of hot-rolled round steel are 5.5-250 mm. Among them: 5.5-25 mm small round steel is mostly supplied in bundles of straight strips, which are often used as steel bars, bolts and various mechanical parts; round steel larger than 25 mm is mainly used for manufacturing mechanical parts and tube blanks of seamless steel pipes wait.


Ⅱ. Classification by chemical composition

Carbon steel can be divided into low carbon steel, medium carbon steel and high carbon steel according to chemical composition (that is, carbon content).

(1) Mild steel

Also known as mild steel, the carbon content is from 0.10% to 0.30%. Low carbon steel is easy to accept various processing such as forging, welding and cutting, and is often used to make chains, rivets, bolts, shafts, etc.

(2) Medium carbon steel

Carbon steel with a carbon content of 0.25% to 0.60%. There are killed steel, semi-killed steel, boiling steel and other products. In addition to carbon, it can also contain a small amount of manganese (0.70% to 1.20%). According to product quality, it is divided into ordinary carbon structural steel and high-quality carbon structural steel. Good thermal processing and cutting performance, poor welding performance. The strength and hardness are higher than low carbon steel, but the plasticity and toughness are lower than low carbon steel. Hot-rolled and cold-drawn materials can be used directly without heat treatment, or after heat treatment. Medium carbon steel after quenching and tempering has good comprehensive mechanical properties. The highest hardness that can be achieved is about HRC55 (HB538), and σb is 600-1100MPa. Therefore, in various uses of medium strength level, medium carbon steel is the most widely used. In addition to being used as building materials, it is also widely used in the manufacture of various mechanical parts.

(3) High carbon steel

Often called tool steel, the carbon content is from 0.60% to 1.70%, and it can be hardened and tempered. Hammers, crowbars, etc. are made of steel with a carbon content of 0.75%; cutting tools such as drills, taps, reamers, etc. are made of steel with a carbon content of 0.90% to 1.00%.

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