3J21 precision alloy

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3J21 (Executive standards GB / T 15018-1994 and Yb / T 5253-1993)

Chemical composition of 3J21:

3J21的物理性能:

密度	8.4 g/cm3
熔点	1372-1405℃

3J21 solid solution state, mechanical properties of the alloy at room temperature:

Alloy state

Tensile strength < br clear = "all" / > σ B (MPA)

Elongation < br clear = "all" / > a5%

hardness

3J21

≥700

≥35

≤250

3J21 delivery state, mechanical properties of the alloy at room temperature:

Product variety	Delivery status	Thickness or diameter	Performance group	Tensile strength < br clear = "all" / > σ B (MPA)	Elongation < br clear = "all" / > a5%
belt	cold rolling	0.20～2.5	A	1175~1470	≥5
belt	cold rolling	0.20～2.5	B	1470~1765	≥3
silk	Cold drawing	0.20～5.0	A	1275~1570	≥8
silk	Cold drawing	0.20～5.0	B	1570~1865	≥6

This alloy has the following properties:

3J21 is an elastic alloy containing 40% cobalt. Its three characteristics are nonmagnetic, corrosion-resistant and high elasticity

Metallographic structure of 3J21:

3J21 Alloy is austenitic

The application fields of 3J21 include:

1. Suitable for making non-magnetic, corrosion-resistant and high elastic components

2. Wire tensioning, spinning, etc. in precision instruments

Products of our company:

Cold and hot plate forging bar of wire and strip