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SUS630 Stainless steel

SUS630 is martensitic precipitate hardened stainless steel. With high strength, high hardness, good welding performance and corrosion resistance. At present, it has been widely used in valve, shaft and chemical fiber industry and high strength parts with certain corrosion resistance requirements.

SUS630 stainless steel

Precipitate hardened section steel with added copper. Used for manufacturing shaft and steam turbine parts.

Composed of copper, niobium/columbium precipitates hardened martensitic stainless steel, low carbon content, corrosion resistance and weldability than general Martensitic stainless steel, similar to 18-8 type stainless steel, heat treatment process is simple, good machinability, but it is difficult to meet the deep and cold processing.

SUS630 stainless steel [metallographic structure] microstructure characteristics of precipitation hardening type.

SUS630 stainless steel [Purpose] used for manufacturing high corrosion resistance, high strength parts, such as bearings, steam turbine parts.

SUS630 stainless steel

Carbon C: ≤0.07 Silicon Si: ≤1.00 Manganese Mn: ≤1.00 sulfur S: ≤0.030

P: ≤0.035 Chromium Cr: 15.50 ~ 17.50 Nickel Ni: 3.00 ~ 5.00

Cu: 3.00 ~ 5.00 Niobium Nb: 0.15 ~ 0.45

SUS630 Stainless steel [Delivery status]

Generally, the goods are delivered in the condition of heat treatment, and the type of heat treatment is indicated in the contract. If it is not indicated, the goods will be delivered without heat treatment.

SUS630 alloy is precipitated, quenched, martensitic stainless steel, and this grade has properties such as high strength, hardness and corrosion resistance. After heat treatment, the mechanical properties of the product are more perfect, and the compressive strength can reach up to 1100-1300 mpa (160-190 kSi). This grade is not intended for use above 300℃ (570F) or very low temperatures. It has good corrosion resistance to atmospheric and diluted acids or salts, as is the case with 304 and 430.

SUS630 stainless steel [mechanical properties]

Tensile strength σ B (MPa) : aged at 480℃,≥1310; 550 ℃ ageing, p 1060; 580 ℃ ageing, p 1000; 620 ℃ ageing, p. 930

Condition yield strength σ0.2 (MPa) : aged at 480℃,≥1180; 550 ℃ ageing, p 1000; 580 ℃ ageing, p 865; 620 ℃ ageing, p. 725

Elongation δ5 (%) : aged at 480℃,≥10; 550 ℃ ageing, 12 or higher; 580 ℃ ageing, 13 or higher; 620 ℃ ageing, 16 or higher

ψ (%) : aging at 480℃,≥40; 550 ℃ ageing, 45 or higher; 580 ℃ ageing, 45 or higher; 620 ℃ ageing, 50 or more

Hardness: solution,≤363HB and ≤38HRC; Aged at 480℃,≥375HB and ≥40HRC; Aged at 550℃,≥331HB and ≥35HRC; Aged at 580℃,≥302HB and ≥31HRC; Aging at 620℃,≥277HB and ≥28HRC

SUS630 stainless steel [heat treatment process]

Heat treatment specification:

1) Fast cooling at 1020 ~ 1060℃ for solution;

2) Aged at 480℃, air cooled at 470 ~ 490℃ after solution treatment;

3) Aged at 550℃, air cooled at 540-560 ℃ after solution treatment;

4) Aged at 580℃, air cooled at 570 ~ 590℃ after solution treatment;

5) Aging at 620℃, after solution treatment, air cooling at 610 ~ 630℃. Metallographic structure: the structure features are precipitate hardening type.

SUS630 Stainless steel [Delivery status]

Generally, the goods are delivered in the condition of heat treatment, and the type of heat treatment is indicated in the contract. If it is not indicated, the goods will be delivered without heat treatment.

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