430 stainless steel grinding rod features:

Precipitation hardening steel with added copper. For the manufacture of shafts, steam turbine components. Precipitation hardening martensitic stainless steel composed of copper, niobium/columbium, low carbon content, better corrosion resistance and weldability than general martensitic stainless steel, similar to 18-8 type stainless steel, simple heat treatment process, cutting Good performance, but difficult to meet cryogenic processing. Metallographic structure: The structure is characterized by precipitation hardening.

chemical composition

Carbon C: ≤0.07

Silicon Si: ≤1.00

Manganese Mn: ≤1.00

Sulfur S: ≤0.030

Phosphorus P: ≤0.035

Chromium Cr: 15.50～17.50

Nickel Ni: 3.00～5.00

Copper Cu: 3.00～5.00

Niobium Nb: 0.15～0.45

Mechanical properties

Tensile strength σb (MPa): aging at 480℃, ≥1310; aging at 550℃, ≥1060; aging at 580℃, ≥1000; aging at 620℃, ≥930

Conditional yield strength σ0.2 (MPa): aging at 480℃, ≥1180; aging at 550℃, ≥1000; aging at 580℃, ≥865; aging at 620℃, ≥725

Elongation δ5 (%): aging at 480℃, ≥10; aging at 550℃, ≥12; aging at 580℃, ≥13; aging at 620℃, ≥16

Area shrinkage ψ (%): aging at 480℃, ≥40; aging at 550℃, ≥45; aging at 580℃, ≥45; aging at 620℃, ≥50

Hardness: solid solution, ≤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 specification:

1) Rapid cooling of solid solution at 1020-1060°C;

2) Aging at 480℃, after solution treatment, air cooling at 470～490℃;

3) Aging at 550℃, after solution treatment, air cooling at 540～560℃;

4) Aging at 580℃, after solution treatment, air cooling at 570～590℃;

5) Aging at 620℃, after solution treatment, air cooling at 610～630℃.

Metallographic structure: The structure is characterized by precipitation hardening.

630 stainless steel grinding rod application field

Offshore platforms, helidecks, other platforms, food industry, pulp and paper industry, aerospace (turbine blades), mechanical components, etc.