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8101 Stainless Steel Combination Wrench

Optional Materials:
1. Austenitic stainless steel: grade 304
This material is non-magnetic or weakly magnetic, featuring high tenacity and ductility, corrosion resistance and thermostability. But its strength cannot be strengthened by phase transformation.
Application: 304 is mainly applied in household goods, medical appliance, ship accessories, auto parts, building materials, chemical and food industries.

Physical property
Tensile strength: σb(MPa)≥520
Offset yield strength:σ0.2(MPa)≥205
Elongation:δ5(%)≥40
Contraction percentage of area: z(%)=60
Density (20℃, g/cm3): 7.93
Hardness: HRC15-25
Melting point (℃): 1398~1454
Specific heat (0~100℃, KJ·kg-1K-1): 0.50
Heat conductivity (W·m-1·K-1): (100℃) 16.3, (500℃) 21.5
Linear expansion coefficient (10-6·K-1): (0~100℃) 17.2; (0~500℃) 18.4
Resistivity (20℃, 10-6Ω·m): 0.73
Magnetism: ≤5nT within 10cm in the magnetic field

2. Martensitic stainless steel (stainless steel for cutting tools): representative grade: 420
The mechanical property of martensitic stainless steel can be adjusted through heat treatment. Popularly speaking, it is a kind of hardenable stainless steel. Its hardness becomes higher after quenching. And different tempering temperatures result in different combinations of strength and tenacity. This stainless steel is used in conditions requiring no high corrosion resistance and the fields in which cutting tools and machine elements have high requirements on strength.

Physical property
Tensile strength: σb(MPa)≥365
Offset yield strength:σ0.2(MPa)≥440
Elongation:δ5(%)≥20
Contraction percentage of area: z(%)=50
Density (20℃, g/cm3): 7.75
Hardness: HRC35-45
Melting point (℃): 1427
Specific heat (25℃, J·kg-1K-1): 460
Heat conductivity (W·m-1·K-1): 24.9
Linear expansion coefficient (mm/℃): (at20-100℃)