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12CrMo steel round bar
ZHONG RUN
PRODUCT INTRODUCTION
12CrMo round bar is a chromium-molybdenum-based alloy carbon steel primarily used in high-temperature and high-pressure environments. It is typically manufactured in accordance with GB/T 3077 or relevant pressure vessel standards. Thanks to its stable microstructure and alloy content, it delivers excellent heat resistance, oxidation resistance, and long-term strength retention.
This steel grade is widely used in the fabrication of parts for steam pipes, superheaters, headers, and other structural components in thermal and chemical plants.
12CrMo is a pearlitic heat-strength steel with good cold strain plasticity and machinability, and weldability is acceptable. It is used to manufacture main pipes with steam parameters up to 510°C, superheated pipes with pipe wall temperatures up to 540°C, etc. It can also be used to make various elastic components working at high temperatures.
Excellent mechanical strength at elevated temperatures
Good weldability and machining performance
High creep resistance and oxidation resistance
Stable performance after long-term operation
Suitable for both forging and heat treatment
PRODUCT DESCRIPTION
12CrMo steel bar Steel Chemical Composition
Element | Composition (%) |
Carbon (C) | 0.10～0.15 |
Silicon (Si) | ≤0.30 |
Manganese (Mn) | 0.60-0.90 |
Sulfur(S) | ≤0.025 |
Chromium (Cr) | 0.40-0.70 |
Molybdenum (Mo) | 0.15～0.25 |
Copper(Cu) | ≤0.25 |
Nickel(Ni) | ≤0.025 |
Chemical Composition
| Element | Content (%) |
|---|---|
| C | 0.08 – 0.15 |
| Si | 0.17 – 0.37 |
| Mn | 0.40 – 0.70 |
| Cr | 0.90 – 1.20 |
| Mo | 0.15 – 0.25 |
| P / S | ≤ 0.035 |
Mechanical Properties (Heat Treated):
Tensile Strength: 450 – 600 MPa
Yield Strength: ≥ 275 MPa
Elongation: ≥ 20%
Hardness (HB): ≤ 179 (annealed condition)
PRODUCT SHOW
APPLICATION
12CrMo carbon steel round bars are widely used in industries requiring high-temperature structural components, especially those exposed to thermal cycling and internal pressure:
Boiler components – headers, steam drums
Petrochemical industry – reformer tubes, manifolds
Thermal power plants – heat exchangers, turbine parts
High-pressure piping systems
Oil & gas – refinery tubes and fittings
Mechanical engineering – shafts, discs, flanges
This grade is particularly suitable for parts that must retain long-term strength and dimensional stability under high stress.
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