12Cr2Mo1R is a low-alloy heat-resistant steel plate widely used in the manufacturing of pressure vessels, storage tanks, and other equipment in industries such as petroleum, chemical, and power. Below are the detailed specifications and dimensions of 12Cr2Mo1R steel:

I. Chemical Composition

The chemical composition of 12Cr2Mo1R must comply with the requirements of GB/T 3077-2015, as detailed below:

Carbon (C): 0.08%-0.15%; Silicon (Si): 0.17%-0.37%; Manganese (Mn): 0.40%-0.70%; Phosphorus (P): ≤0.025%; Sulfur (S): ≤0.010%; Chromium (Cr): 1.90%-2.20%; Molybdenum (Mo): 0.25%-0.35%; Nickel (Ni): ≤0.30%; Copper (Cu): ≤0.25%.

II. Mechanical Properties

The mechanical properties of 12Cr2Mo1R must comply with the requirements of GB/T 1591-2018, as detailed below:

Tensile Strength (): ≥510; Yield Strength (): ≥345; Elongation After Fracture (%): ≥18; Impact Absorbed Energy (J): ≥47; Hardness Value (HB): ≤207.

III. Surface Quality

The surface quality of 12Cr2Mo1R must meet the following requirements:

1. The surface must be free from defects such as cracks, folds, slag inclusions, and bubbles;
2. The depth of surface defects such as rust and pitting must not exceed half of the thickness tolerance of the steel plate;
3. Sheared edges must be smooth and free from defects such as burrs and rough edges.

IV. Delivery Condition

12Cr2Mo1R should be delivered in a hot-rolled or normalized condition. Without mutual agreement between Party A and Party B, the delivery condition must not be altered arbitrarily.

V. Other Requirements

1. The dimensions, shape, and allowable deviations of the steel plates must comply with the relevant standard requirements;
2. The surface quality of the steel plates must meet the relevant regulations;
3. The steel plates should be delivered in a hot-rolled or normalized condition;
4. The steel plates should be delivered in bundles, with each bundle consisting of plates of the same thickness and width. Suitable materials should be used to separate the plates during bundling, and the bundle number and quantity should be clearly marked. The bundled plates should remain flat, and the bundling materials should not cause any damage to the plates.