65Mn GB /T 4358-1995 Carbon spring steel wire

65Mn GB /T 4358-1995 Carbon spring steel wire is a kind of metal material with excellent properties, which is widely used in many fields.

Mechanical property

After proper heat treatment, 65Mn has high strength and toughness, as well as good elasticity. The tensile strength can reach more than 735MPa, the yield strength is more than 430MPa, the elongation is between 14% and 21.5%, and the section shrinkage is not less than 10%.Wear resistance and corrosion resistance: Due to the addition of manganese, the wear resistance of the material is improved, which is suitable for the production of parts that need to withstand friction for a long time. At the same time, compared with ordinary carbon steel, 65Mn also has better corrosion resistance.

Material designation	65Mn
China ISC	U21652
Correspondence standard	GB /T 4358-1995 Carbon spring steel wire for significant use
Classify	Carbon steel
Performance	Flexible and easy machinability hardenability
Label	Spring steel wire
Explain	The steel is a very widely used spring steel grade, high strength, good hardenability and comprehensive mechanical properties, small decarbonization tendency, good cutting performance, and low price. However, it has overheating sensitivity and tempering brittleness, and it is easy to appear quenching crack. Poor corrosion resistance. For slightly larger ordinary springs, such as 5~10mm leaf springs and wire diameter 1~15mm coil springs, can also be used as spring rings, valve springs, spring, shock absorbers and clutch reeds, as well as cold coil springs made of drawing steel wire 65Mn is widely used in the fastener industry, can produce all kinds of spring washers, elastic cylindrical pins and some elastic rings, etc., a small amount of nuts. No bolts, screws and conventional washers. Recommended selection: All kinds of spring washers, pins and clasp, etc., working in a non-corrosive environment, strength 40~54HRC, recommended selection. ①scope This standard specifies the classification, size, shape, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of carbon spring steel wire for important uses. This standard is suitable for the manufacture of springs with high stress, valve springs and other important applications without heat treatment or only low temperature tempering. ② Classification and code: - According to the use of steel wire divided into three groups: group E, group F, group G ③ Size, shape and weight: - Size: Wire diameter range: Group E, Group F: 0.08~6mm; Group G: 1~6mm - Wire diameter shall comply with GB 342 Table 1. - The allowable deviation of wire diameter shall be in accordance with Table 3 of GB 342. ④ Mechanical properties: the tensile strength of the steel wire should comply with the provisions of Table 3 of this standard

65Mn Chemical element content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum value	0.62	0.17	0.7	-	-	-	-	-
Maximum value	0.69	0.37	1	0.025	0.02	0.1	0.15	0.2

Application field

65Mn carbon spring steel wire is widely used in many fields due to its excellent performance, including but not limited to:

Spring manufacturing: Used to make a variety of small size flat spring, round spring, cushion spring, spring spring, as well as spring ring, valve spring, clutch spring, brake spring, etc.

Cold processing products: manufacture cold rolled strip steel, cold drawn steel wire, coil spring, etc.

Mechanical equipment: Used as spring components in mechanical equipment and precision instruments.

Other industries: Also used in Simmons bed, automobile and various cushions, machinery manufacturing, stationery power tools, sports equipment, electrical equipment and other industries.

Examples of machined fastener products

65Mn (GB 1222/4358/3525; Some products processed by YB 5058
Name	Model	Performance level	Specifications
Conical lock washers for assemblies	GB 9074.28-1988	40~50HRC	5~8
Spring washers for assemblies	GB 9074.26-1988	42~50HRC	2.5~12
Tapered serrated lock washer	GB 956.2-1987	40~50HRC	3~5
Elastic retainer for shaft	GB 894.1-1986	47~54HRC	3~85
Wire retaining ring for shaft	GB 895.2-1986	-	4~35
Hole with wire ring	GB 895.1-1986	-	7~65
Elastic retainer for hole	GB 893.1/.2	47~54HRC/44~51HRC	3~200
Standard spring washer	GB 93-1987	42~50HRC	2~27
Corrugated elastic washer	GB 955-1987	40~50HRC	3~12
Saddle shaped elastic washer	GB 860-1987	-	2~8
Retaining nut	GB 805-1988	30~40HRC	6~48

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