SPCC-SD Cold Rolled Steel Strip DC01 Cold Rolled Steel Strip
Spcc cold rolled steel strip is a general & steel, its chemical composition&mechanical properties equivalent to GB q195 steel& q215a steel.
Spcc steel chemical%:
Spcc steel Mechanical Properties
Yield Strength mpa
tensile strength mpa
Jis g3141 Spcc steel sheet/strip application:
Jis g3141 spcc steel sheet/steel strip, is a kind of cold rolled carbon steel sheet/steel strip.its main characteristics are low or very low carbon %,it contain fine grain and Ti,Nb alloy elements.it has a wide application in auto body,gear,transmission shaft,pinion steel,crankshaft.cold forging steel for standardized parts & components etc.
White&Bule Color Spring Steel Strip 65Mn Cold Rolled Steel Sheet HRC40
White color spring steel strip 65Mn
65Mn steel is a Chinese GB standard spring steel grade, Manganese (Mn) improves hardenability, so the strength, hardness, elasticity and hardenability are higher than that of 65# steel, but it has overheat sensitivity and temper brittleness. Water quenching tends to form cracks. The annealed state has good machinability, low cold deformation plasticity, and poor weldability.
65Mn high carbon steel is mainly used in the manufacture of various small-section flat springs, round springs, clockwork, etc. It can also be used to manufacture spring rings, valve springs, shock absorbers, clutch reeds and brake springs.
The table below lists 65Mn high carbon steel chemical composition based on heat analysis
|Chemical Composition, %|
|Standard||Grade||C||Si||Mn||P, ≤||S, ≤||Cr, ≤||Ni, ≤||Cu, ≤|
|Standard||Grade||Tensile Strength, MPa, ≥||Yield Strength, MPa, ≥||Elongation, %, ≥||Reduction in Area, %, ≥||Brinell Hardness, HBW, ≤|
Notes: Bars with a diameter and side length of not more than 80 mm and flat steels with a thickness of not more than 40 mm.
|Tensile strength||Conditions to yield strength||Elongation||Reduction of area|
|Hardness (Cold Drawn)|
|σb (MPa):≥980||σ0.2 (MPa):≥785||δ 5 (%):≥8||ψ (%):≥30||≤302HB;||≥HRC40|
|Standard||Grade||Quenching temperature, °C||Quenching medium||Tempering temperature, °C|
|GB/T 1222||65Mn||830 ± 20||Oil||540 ± 20|
Annealing process: Annealing temperature (860 ± 10) °C, heat preservation for 45-60min, furnace cooling to (750 ± 10) °C, heat preservation for 3-3.5h, and furnace cooling to 650-660 °C, then cooling out of the furnace or slow cooling in a heat preservation pit.
Annealing of 65Mn Spring Steel
At first Slowly heated to 730 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. Then 65Mn tool steel will get MAX 250 HB (Brinell hardness).
Hardening of 65Mn Spring Steel
At the beginning, 65Mn steels should be heated uniformly to 830-860°C (1526-1580°F) until completely heated through. After about 30 min per 25 mm of ruling section is to be provided and then the steels should be immediately quenched in oil. Tempering of 65Mn Spring Steel Tempering of 65Mn steels is performed at 540°C, Soak well at the selected temperature and soak for at least one hour per 25mm of total thickness. Hardness values at different temperatures after tempering.
Blue Color Spring steel strip 65Mn Hardness > HRC40
Spcc-sd,dc01 cold rolled steel strip 50# 65Mn cold rolled pring steel strip coil package
Each small coil will package by moisture proof paper or moisture proof bag, then package in wooden pallet.
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