T/CFA 02010124.1-2018 Wind power ball ductile iron parts ordering technical specification

Scope

Scope: This standard specifies the material grades and mechanical properties, dimensional and weight tolerances, appearance quality, inspection, packaging, storage, transportation, and random documents of nodular cast iron parts for wind power applications. This standard applies to nodular cast iron parts for wind power applications, which are hand-molded or mechanically molded using resin sand, such as hubs, bases, main shafts, bearing seats, gear brackets, gearbox housings, etc., for design, production, and acceptance. Main technical content: The requirements for casting material grades shall be selected according to the purchaser's order requirements from the material grades specified in this standard: - QT400-18AL: Suitable for ambient temperatures of -20°C to +50°C - QT400-18AL-1: Suitable for ambient temperatures of -30°C to +50°C - QT400-18AL-2: Suitable for ambient temperatures of -40°C to +50°C - QT350-22AL: Suitable for ambient temperatures of -40°C to +50°C - QT700-2A: Suitable for ambient temperatures of -20°C to +50°C The chemical composition is shown in Table 1 and is not used as a basis for acceptance. The data is for reference only. If the purchaser has special requirements for the casting, the chemical composition of the material shall be determined by negotiation between the supplier and the purchaser. Table 1: Chemical Composition Requirements Material C% Si% Mn% P% S% Re% Mg% QT400-18AL 3.6–3.9 1.8–2.4 ≤ 0.30 ≤ 0.04 ≤ 0.020 ≤ 0.020 0.03–0.06 QT400-18AL-1 3.6–3.9 1.8–2.3 ≤ 0.25 ≤ 0.04 ≤ 0.020 ≤ 0.020 0.03–0.06 QT400-18AL-2 3.6–3.9 1.8–2.2 ≤ 0.20 ≤ 0.04 ≤ 0.020 ≤ 0.020 0.03–0.06 QT350-22AL 3.6–3.9 1.7–2.1 ≤ 0.20 ≤ 0.04 ≤ 0.020 ≤ 0.020 0.03–0.06 QT700-2A 3.6–3.8 2.0–2.4 0.30–0.60 ≤ 0.04 ≤ 0.020 ≤ 0.020 0.03–0.06 Table 3: Tensile Properties and Hardness of Single Casting Specimens Material Tensile Strength Rm (MPa) (min) Yield Strength Rp0.2 (

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