Gost 8732 12ХМ low Alloy Steel seamless Pipes Manufacturer
As a trusted manufacturer and global supplier of GOST 8732 12ХМ Seamless Steel Pipes, we are offering high-quality alloy steel pipes for high-temperature and pressure applications in power plants, refineries, and chemical industries.
The 12ХМ steel grade (12CrMo) corresponds to ASTM A335 Grade P12 and DIN 13CrMo4-5, known for its excellent strength, heat resistance, and oxidation resistance under elevated temperature service.
12ХМ also known as 12KhM ,which is a low-alloy structural heat-resistant steel. It has high resistance to extreme temperatures. it is one of the best heat-resistant metals in terms of price/quality ratio.
12ХМ (12KhM) – Cr-Mo alloy (chromium-molybdenum) alloy steel known for excellent heat resistance and mechanical strength.
12KhM ( 12ХМ )Chemical composition according to GOST 5520
| C | Si | Mn | Ni | S | P | Cr | Mo |
| max 0.16 | 0.17 – 0.37 | 0.4 – 0.7 | max 0.3 | max 0.025 | max 0.025 | 0.8 – 1.1 | 0.4 – 0.55 |
Mechanical properties under Т=20oС for grade 12KhM ( 12ХМ )
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| – | mm | – | MPa | MPa | % | % | kJ / m2 | – |
| Sheet, GOST 5520-79 | 430-550 | 235-245 | 18-22 | 490-590 | ||||
| Pipe | Ø 273 x 28 | longitudinal | 455 | 284 | 31.5 | 66.5 | 1930 | Normalizing 910 – 930oC,Drawing 670 – 690oC,Cooling air, |
GOST 5520 is standard for Rolled carbon low-alloy and alloy steel sheets and plates for boilers and pressure vessels.
Gost 8732 12ХМ seamless Pipes Specfication
OD: 20 – 530mm
WT: 2.65 – 60mm
Length: 3000-12000mm
Applications: Steam pipelines, heat exchangers, refinery systems, and other critical pressure-bearing installations.
Heat Treatment
- Normalization: 940–970°C
- Tempering: 720–750°C
- Post-Weld Heat Treatment (PWHT): Recommended for high-pressure service
- Delivered condition: Normalized + Tempered
Equivalent steels for grade 12KhM ( 12ХМ )
| Grade | Chemical Composition WT % | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C: | Mn: | Si: | P: | S: | Cr: | Mo: | Ni: | V: | Ti: | Cu: | W: | Al: | N: | |
| 13CrMo4-5, 13CrMo4-4, 1.7335 | 0.08 – 0.18 | 0.4 – 1.0 | Max 0.35 | Max 0.025 | Max 0.01 | 0.70 – 1.15 | 0.4 – 0.6 | Max 0.30 | Max 0.012 | |||||
| 13CrMoSi5-5, 1.7336 | Max 0.17 | 0.40 – 0.65 | 0.50 – 0.80 | Max 0.015 | Max 0.005 | 1.00 – 1.50 | 0.45 – 0.65 | Max 0.3 | Max 0.3 | Max 0.012 | ||||
| 15CD4.05, 15CD4, 15 CD 4.05 | Max 0.18 | 0.4 – 0.8 | 0.15 – 0.35 | Max 0.035 | Max 0.035 | 0.8 – 1.2 | 0.4 – 0.6 | Max 0.3 | ||||||
| 15ChM, 15KhM, 15ХМ | 0.11 – 0.18 | 0.40 – 0.70 | 0.17 – 0.37 | Max 0.035 | Max 0.035 | 0.80 – 1.10 | 0.40 – 0.55 | Max 0.3 | Max 0.05 | Max 0.03 | Max 0.3 | Max 0.2 | Max 0.2 | |
| A182 Grade F11, UNS K11572 | 0.1 – 0.2 | 0.3 – 0.8 | 0.5 – 1.0 | Max 0.040 | Max 0.040 | 1.0 – 1.5 | 0.44 – 0.65 | |||||||
| A182 Grade F12, UNS K11562 | 0.05 – 0.15 | 0.3 – 0.61 | Max 0.5 | Max 0.045 | Max 0.045 | 0.8 – 1.25 | 0.44 – 0.65 | |||||||
| UNS K12062 | Max 0.20 | 0.3 – 0.8 | Max 0.6 | Max 0.045 | Max 0.045 | 0.80 – 1.25 | 0.44 – 0.65 | |||||||
Our GOST 5520 12ХМ low alloy steel seamless pipes are engineered to meet the demanding requirements of high-temperature and high-pressure environments. Manufactured in accordance with GOST 5520 standards, these pipes are ideal for use in power plants, petrochemical industries, boilers, and pressure vessels.
Order Example
Product: GOST 8732 Seamless Pipe
Material: 12ХМ (12CrMo)
Size: 114 × 8 mm × 6000 mm
Standard: GOST 8732-78
Heat Treatment: Normalized + Tempered
Quantity: 25 tons
Application: Boiler Steam Line
Certification: EN 10204 3.1
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