Chrome Moly W.Nr. 12CrMo9-1 Alloy Steel Bars

Chrome Moly W.Nr. 12CrMo9-1 Alloy Steel Bars

Name: Chrome Moly W.Nr. 12CrMo9-1 Alloy Steel Bars
Brand: JAYANT IMPEX
Price: 295.0 INR
Availability: InStock

295.0 INR/Kilograms

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Product Details:

Application Heat exchangers, Boilers, Power plants, Oil and gas industries
Specific Use Pressure vessels, High temperature service
Grade 12CrMo9-1
Technique Hot Rolled / Forged
Processing Cold Drawn, Peeled, Centreless Ground
Diameter 6mm to 300mm or as required
Length As required / Custom cut lengths available
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Chrome Moly W.Nr. 12CrMo9-1 Alloy Steel Bars Price And Quantity

Price 295.0 INR/Kilograms
Minimum Order Quantity 1 Kilograms

Chrome Moly W.Nr. 12CrMo9-1 Alloy Steel Bars Product Specifications

Application Heat exchangers, Boilers, Power plants, Oil and gas industries
Specific Use Pressure vessels, High temperature service
Tolerance H9, H11, H13 or as per requirement
Material Chrome Moly W.Nr. 12CrMo9-1 Alloy Steel
Grade 12CrMo9-1
Processing Cold Drawn, Peeled, Centreless Ground
Standard EN 10028-2, DIN 17175, ASTM A335
Technique Hot Rolled / Forged
Finish Bright, Black, Polished
Type Round Bars
Length As required / Custom cut lengths available
Diameter 6mm to 300mm or as required

Elongation Minimum 20%
Delivery Condition Annealed / Normalized / Quenched & Tempered
Heat Treatment Supplied in normalized or tempered condition
Packaging Bundled or as per client requirement
Yield Strength Minimum 280 MPa
Hardness Max 229 HB
Surface Condition Smooth and free from surface defects
Tensile Strength 450 - 600 MPa
Impact Value Minimum 27 J at -20C
Test Certificate EN 10204 3.1 / 3.2 available

Product Description

W.Nr. 1.7380 (chemically designated as 10CrMo9-10 or 12CrMo9-10 depending on the specific standard revision) is a highly specialized, low-alloy chrome-moly steel.

Unlike conventional high-tensile or case-hardening bars, this grade is engineered fundamentally as a creep-resistant, heat-resistant pressure vessel steel. Packed with roughly 2.25% chromium and 1% molybdenum, it is built to survive prolonged, continuous stress in elevated temperature zones (up to 600C) where standard carbon and alloy steels would deform, oxidize, or suffer catastrophic creep rupture.

Global Equivalents

Because this alloy is critical for heavy industrial boilers and refinery infrastructures worldwide, it maps directly to highly recognized pressure vessel standards:

USA (ASTM / ASME): ASTM A387 Grade 22 / A182 F22 (Forgings/Bars)
Germany (DIN / WNr): 10CrMo9-10 (1.7380) / Old: 12CrMo9-10
Europe (EN): 11CrMo9-10 (1.7383)
France (AFNOR): 10CD9-10
UK (BS): 1503-622 / 622Gr31

Chemical Composition (Typical %)

The "2.25Cr-1Mo" chemistry profile is tightly controlled. The elevated chromium delivers robust resistance to high-temperature scale and oxidation, while the molybdenum provides structural creep resistance under extreme hot pressure.

Carbon (C)	Chromium (Cr)	Molybdenum (Mo)	Manganese (Mn)	Silicon (Si)	Phosphorus (P)	Sulfur (S)
0.08% 0.15%	2.00% 2.50%	0.90% 1.10%	0.40% 0.70%	0.15% 0.50%	0.020%	0.015%

Mechanical Properties (Normalized & Tempered, +NT)

Bars are typically delivered in a normalized and tempered state to stabilize the microstructure for elevated thermal applications.

Tensile Strength ( $R_m$ ): 520 670 MPa
Yield Strength ( $R_{e}$ ): 310 330 MPa
Elongation ( $A$ ): 18% (Excellent ductility to combat thermal expansion cycling)
Impact Energy (Charpy-V, 20C): 40 J
Hardness Range: Typically 160 210 HBW

Distinct Technical Advantages

Superior Creep Resistance: It resists the slow, progressive deformation (creep) that metals undergo when subjected to high stress at elevated temperatures over long service lives.
Hydrogen Attack Resistance: The high chromium content binds carbon effectively, making the alloy highly resistant to high-temperature hydrogen attack (HTHA) and structural embrittlement in chemical environments.
Good Hot Weldability: Because the carbon remains low, it can be welded reliably using matched fillers (like E9018-B3), though standard industrial procedures mandate preheating and post-weld heat treatment (PWHT) to relieve residual stress.

Common Industrial Applications

You will rarely see 1.7380 used for standard automotive gears or structural brackets; instead, these alloy bars and forgings are essential for high-heat, high-pressure processing fields:

Petrochemical & Refineries: High-temperature hydrocracker components, catalytic reformers, heat exchanger tube sheets, and processing flanges.
Power Plant Generation: Main steam pipelines, boiler header blocks, superheater supports, and valve bodies operating at supercritical temperatures.
Heavy Hardware: Specialized high-temperature structural bolts and threaded ties exposed to continuous heat inside industrial furnaces.

Superior Mechanical Properties

12CrMo9-1 alloy steel bars present excellent mechanical characteristics, including a maximum hardness of 229 HB, minimum yield strength of 280 MPa, tensile strength between 450 to 600 MPa, elongation of at least 20%, and an impact value not less than 27 Joules at -20C. These properties make the bars highly suitable for high-pressure and high-temperature applications.

Customizable for Diverse Applications

Available in diameters ranging from 6mm to 300mm and custom-cut lengths, these alloy steel bars are fabricated to suit diverse industrial uses. With finishes like bright, black, or polished, and tolerances like H9, H11, or H13, you receive precisely what your project needs, ensuring maximum performance in fabrication and operational environments.

FAQ's of Chrome Moly W.Nr. 12CrMo9-1 Alloy Steel Bars:

Q: How are Chrome Moly 12CrMo9-1 alloy steel bars typically processed to ensure quality?

A: These alloy steel bars are processed using methods like hot rolling, forging, cold drawing, peeling, and centreless grinding. They undergo strict heat treatments such as normalization or tempering to enhance their mechanical properties and are inspected for surface quality to ensure they are smooth and defect-free.

Q: What are the typical applications of 12CrMo9-1 alloy steel bars?

A: 12CrMo9-1 alloy steel bars are primarily used in high-temperature and pressure environments, such as heat exchangers, pressure vessels, boilers, power plants, and oil and gas facilities, thanks to their excellent strength and thermal resistance.

Q: When should I specify the surface finish and size tolerance for my order?

A: Surface finish (bright, black, or polished) and size tolerance (H9, H11, H13, or custom) should be specified at the ordering stage, as these details are critical for meeting specific application requirements and ensuring seamless fabrication and installation.

Q: Where are these alloy steel bars typically supplied from in India?

A: These bars are widely produced and supplied by dealers, exporters, fabricators, manufacturers, producers, retailers, and traders across India, ensuring reliable availability for both domestic and international projects.

Q: What certifications accompany the delivery of these alloy steel bars?

A: Each delivery can include EN 10204 3.1 or 3.2 test certificates, which provide assurance of chemical composition, mechanical properties, and compliance with international standards such as EN 10028-2, DIN 17175, and ASTM A335.

Q: How can these bars benefit my high-temperature project?

A: Their high yield and tensile strength, reliable elongation, and superior impact values under low temperatures make them particularly beneficial for projects exposed to elevated pressures and temperatures, contributing to operational safety, efficiency, and longevity.

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