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DTD 331
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Specifications DTD331 Aerospace, Round bar, flat bar, plate DTD331 technical data sheet DTD331 properties from Steelmaking, ESR melted, heat treatment

TECHNICAL DATA SHEET - DTD 331

MATERIAL CATEGORY: Aerospace Standard "DTD" series alloy structural steel

OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV

TYPE OF STEEL: Nr - Cr steel

CHEMICAL COMPOSITIONS (mass weight %)

Carbon, C (％): 0.25 ~ 0.40
Silicon, Si (％): ≤ 0.30
Manganese, Mn (％): ≤ 0.70
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.015
Chromium, Cr (％): 0.75 ~ 1.50

Nickel, Ni (%): 3.00 ~ 4.50
Molybdenum, Mo (％): 0.50 ~ 0.85

Vanadium, V (%): 0.15 ~ 0.40

Tungsten, W (%): 0.85 ~ 1.10

MECHANICAL PROPERTIES UNDER ROOM TEMP.

Tensile strength, σb ≥ MPa: 980
Yield strength, σs ≥ MPa: 785
Elongation, δ5 ≥ (%): 12.0

Impact strength, AKv ≥ J: -
Hardness HBS: -

PRODUCT PROFILE & DIMENSIONS
Rod / round bar / disc (diameter): 5.5mm to 950mm
Square bar / flat bar: 8mm to 600mm
Length: random length or based on the customer's special requirement.

Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts, other different shapes based on OEM.

TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers, Email: sales@ccsteels.com

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