8112 Wrench

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The code No.8112 stainless steel single box wrench is used to tighten or loosen bolts and nuts. It is made of stainless steel processed by drop forging.

304QF stainless steel tools technical parameters:
Chemical composition: %

C	Si	Mn	Cr	Ni	S	P	N
≤0.08	≤0.85	≤1.8	18.0-20	8.0-10.5	≤0.03	≤0.045	≤0.2

Physical property

Tensile strength: σb(MPa)≥520
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 (cutting tools stainless steel): representative grade: 420
The mechanical property of martensitic stainless steel is adjustable by heat treatment. Generally speaking, it is a type of hardenable stainless steel. It is hardened after quenching. Different tempering temperatures give different combinations of hardness and toughness. This stainless steel is widely used in such industries where the requirements of corrosion resistance is not very high, plus the cutting tools and machine elements have high requirements on strength.

420 stainless steel tools parameters:
Chemical composition: %

C	Si	Mn	Cr	Ni	S	P
0.16-0.25	≤1.00	≤1.00	12.0-14.0	≤0.75	≤0.03	≤0.04

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℃)

Parameters:

Number	S (mm)	L (mm)	Weight (g)
8112-14	14	270	145
8112-17	17	310	200
8112-19	19	330	250
8112-22	22	350	320
8112-24	24	370	400
8112-27	27	400	500
8112-30	30	430	730
8112-32	32	430	700
8112-36	36	460	900
8112-41	41	490	1090
8112-46	46	520	1560