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Spring steel JIS G4801 SUP10 Flat/round/square Bar

126

The hardness is less than or equal to 321HB;: hot rolling, cold drawing + heat treatment, less than 321HB
Heat treatment and metallographic structure:
Heat treatment specification: quenching 850 DEG C + + 20 DEG C, oil cold; tempering at 500 DEG C + + 50 C (special needs, + + 30 C).
Delivery status: hot rolled steel in the heat treatment or non heat treatment delivery, cold drawn steel in the heat treatment delivery.

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Spring steel JIS G4801 SUP10 main features and application

Spring steel JIS G4801 SUP10 is a kind of pre-hardened material well suited for fabrication requiring shaping by blanking, bending, drawing, extrusion and swaging. Spring steel JIS G4801 SUP10 allows for closer dimensional tolerances and improved finish and available in several grades. Grade selection is important when considering higher levels of wear resistance.
JIS G4801 SUP10 spring steels are used in the manufacture of various sizes and particularly important springs like the spiral spring, engine valve springs,large cross-section and elastic parts which work under condition of 400 degrees.

Equivalent table of spring steel JIS G4801 SUP10 under different standard

GB/T 1222 ASTM JIS G4801 ISO 683-14 BS 970 Part 2 NF A35-571 TOCT 14595 DIN 17221
50CrVA A29M
6150
A322
G61500
SUP10 51CrV4 735A51
735H51
50CrV4 50TØA 50CrV4

Spring steel JIS G4801 SUP10 chemical composition data:(% in mass)

C Si Mn Cr p S Ni Cu Mo V
0.46-0.54 0.17-0.37 0.50-0.80 0.80-1.10 ≤0.030 ≤0.030 ≤0.35 ≤0.25 0.25-0.35 0.10-0.20

Spring steel JIS G4801 SUP10 mechanical property and delivery condition.

Product Type Delivery Condition Mechanical property Delivery Hardness
HB
Rm
Mpa
Rel
Mpa
A11
%
Z
%
Sample
Hot rolled round bar/square bar Hot rolled
1270

1130

10

40
Q+T 321
Forged round bar/square bar Hot rolled
Hot rolled strips Hot rolled
Cold drawing round bar Hot processing
1270

1130

10

40
Hot rolled thin plate Hot rolled
950
12
Cold rolled steel strips Y+T+QT 785-1180
≥835
Y
T
T=tempering;Q=quenching;QT=globurizing;Y=chilling

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