Sus630 Grinding Rod

Delivery Status
Delivered in heat-treated condition unless specified otherwise in the contract; if not specified, goods will be delivered in non-heat-treated condition.
SUS630 alloy is a precipitation-hardened, water quenched, martensitic stainless steel, characterized by high strength, hardness, and corrosion resistance. After heat treatment, the product boasts excellent mechanical properties, achieving a tensile strength of up to 1100-1300 MPa (160-190 ksi). This grade is not suitable for temperatures above 300°C (570°F) or at low temperatures. It exhibits good corrosion resistance against atmospheric conditions and diluted acids or salts, with its corrosion resistance comparable to that of 304 and 430 grades.

Mechanical Properties
Tensile strength σb (MPa): Aging at 480℃ ≥ 1310; at 550℃ ≥ 1060; at 580℃ ≥ 1000; at 620℃ ≥ 930
Condition yield strength σ0.2 (MPa): Aging at 480℃ ≥1180; at 550℃ ≥1000; at 580℃ ≥865; at 620℃ ≥725
δ5 elongation (%): Aging at 480℃ ≥10; aging at 550℃ ≥12; aging at 580℃ ≥13; aging at 620℃ ≥16
Section shrinkage rate ψ (%): Ageing at 480℃ ≥ 40; ageing at 550℃ ≥ 45; ageing at 580℃ ≥ 45; ageing at 620℃ ≥ 50
Hardness: Solution treated ≤363HB and ≤38HRC; aged at 480℃ ≥375HB and ≥40HRC; aged at 550℃ ≥331HB and ≥35HRC; aged at 580℃ ≥302HB and ≥31HRC; aged at 620℃ ≥277HB and ≥28HRC

Heat Treatment Process
Heat Treatment Specifications:
1) Solution treated at 1020-1060°C, quenched rapidly;
2) 480°C aging treatment, followed by air cooling at 470-490°C after solution heat treatment.
3) 550°C aging treatment, followed by air cooling at 540-560°C after solution heat treatment.
4) 580°C aging treatment; after solution heat treatment, air cool at 570-590°C.
5) 620°C aging treatment, followed by air cooling at 610-630°C after solution heat treatment. Microstructure: characterized by precipitation hardening.

Delivery Status
Shipment is generally made in the heat-treated condition, with the specific type of heat treatment specified in the contract; if not specified, shipment will be made in the non-heat-treated condition.

Application Fields
Offshore Platforms, Helicopter Decks, Other Platforms, Food Industry, Pulp and Paper Industry, Aerospace (turbine blades), Mechanical Components, Nuclear Waste Containers.

Corresponding brand number and ingredient description

Heat treatment methods for SUS630 stainless steel bars
Due to the expected change in the physical properties of the metal, stainless steel is heated and cooled. In this regard, we should note that heat treatment can improve the microstructure of stainless steel. The heat treatment process has been used to treat the toughness, hardness, and wear resistance of stainless steel.
Furthermore, for a company focusing on a key aspect, when it comes to heat treatment, we actually include operations such as hardening, tempering, and a series of processes like annealing and surface hardening.
On stainless steel rods, the fact to note is that the metal should be uniformly heated to the appropriate temperature during the hardening process, followed by the actual quick immersion in water or oil quenching, or it can also be frozen or cooled in an air-cooled area, thereby achieving the desired hardness of the metal.