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Mavi Çelik Makina Metal San.Ve Tic.Ltd.Şti.
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Adres: 1200. CADDE (ESKİ 29) 120-122

Tel 1: 0 (312) 394 04-70 () -71

Faks:

Email 1: haydar@mavicelik.com.tr

Email 2: info@mavicelik.com.tr

Web: http://www.mavicelik.com.tr/

Spring Steels

The desired properties in steels to be used as spring material can be described as sufficient load strength, good flexibility, unlimited safety against breakage. These properties can only be possible with proper steel selection and heat treatment. It is essential that the material does not lose its ductility by increasing the load strength.

One of the important issues to be considered in the production of flexible parts is the inconvenience of welding the parts. Additionally; Events such as surface notch effect, internal cracks that may arise from heat treatment, decarburation that occurs on the surface and which disrupts the homogeneous hardness of the material can be specified as the reasons that increase the breaking effect. In addition, processes such as sensitivity of surface roughness, thermochemical hardening (nitrification), sandblasting can be said to reduce the risk of breakage.

If the steel material is formed at room temperature, high bending stresses occur, which reduces the flexibility of the manufactured part. For this reason, annealing of shaped parts at low temperatures is appropriate.

SPRING STEELS AND COMPOSITIONS
material no. RELIGION SAE / AISI NS NS mn Pmax Smax cr B.C Nmax
1.0900 38 C 6 – 0.35-0.42 1.40-1.60 0.50-0.80 0.050 0.050 – – 0.007
1.0902 46 C 7 – 0.42-0.50 1.50-1.80 0.50-0.80 0.050 0.050 – – 0.007
1.0903 51 C 7 – 0.47-0.55 1.50-1.80 0.50-0.80 0.045 0.045 – – 0.007
1.0904 55 C 7 9255 0.52-0.60 1.50-1.80 0.70-1.00 0.045 0.045 – – –
1.0906 65 C 7 – 0.60-0.68 1.50-1.80 0.70-1.00 0.050 0.050 – – 0.007
1.0908 60 SiMn 5 – 0.55-0.65 1.00-1.30 0.90-1.10 0.050 0.050 – – 0.007
1.0961 60 SiCr 7 9262 0.55-0.65 1.50-1.80 0.70-1.00 0.045 0.045 0.20-0.40 – 0.007
1.0970 38 C 7 – 0.35-0.42 0.15-035 0.50-0.80 0.045 0.045 – – 0.007
1.1231 Ck 67 1070 0.65-0.72 0.15-0.35 0.60-0.90 0.035 0.035 – – –
1.1248 Ck 75 1075 0.70-0.80 0.15-0.35 0.60-0.80 0.035 0.035 – – –
1.1269 Ck 85 1086 0.80-0.90 1.50-1.80 0.45-0.65 0.035 0.035 – – –
1.1274 Ck 101 1095 0.95-1.05 0.15-0.35 0.40-0.60 0.035 0.035 – – –
1.5028 65 C 7 – 0.60-0.70 1.50-1.80 0.70-1.00 0.035 0.035 – – –
1.5029 71 Si 7 – 0.68-0.75 1.50-1.80 0.60-0.80 0.035 0.035 – – –
1.5225 51 MnV 7 – 0.48-0.55 0.15-0.35 1.60-1.90 0.035 0.035 – – –
1.7103 67 SiCr 5 – 0.62-0.72 1.20-1.40 0.40-0.60 0.035 0.035 0.40-0.60 – –
1.7138 52 MnCrB 3 50B50 0.48-0.55 0.15-0.35 0.75-1.00 0.035 0.035 0.40-0.60 B 0.0005
1.7176 55 Cr 3 5155 0.52-0.59 0.15-0.40 0.70-1.00 0.035 0.035 0.60-0.90 – –
1.7701 51 CrMoV 7 – 0.48-0.56 0.15-0.40 0.70-1.00 0.035 0.035 0.90-1.20 0.15-0.25 –
1.8159 50 CrV 4 6150 0.47-0.55 0.00-0.40 0.70-1.00 0.035 0.035 0.90-1.20 – –
1.8161 58 CrV 4 – 0.55-0.62 0.15-0.40 0.70-1.00 0.035 0.035 0.90-1.20 – –

MECHANICAL PROPERTIES FOR SPRING STEELS
material no. RELIGION SAE / AISI FLOW LIMIT TENSILE STRENGTH Elongation at Break
( N/mm2 ) ( N/mm2 ) ( % )
1.0900 38 C 6 – 1030 1180-1370 6
1.0902 46 C 7 – 1080 1275-1470 6
1.0903 51 C 7 – 1130 1320-1570 6
1.0904 55 C 7 9255 1080 1275-1470 6
1.0906 65 C 7 – 1080 1275-1470 6
1.0908 60 SiMn 5 – 1030 1320-1520 6
1.0961 60 SiCr 7 9262 1130 1320-1570 6
1.0970 38 C 7 – 1030 1180-1370 6
1.7103 67 SiCr 5 – 1320 1470-1670 6
1.7176 55 Cr 3 5155 1180 1370-1620 6
1.7701 51 CrMoV 7 – 1180 1370-1670 6
1.8159 50 CrV 4 6150 1180 1370-1620 6
1.8161 58 CrV 4 – 1320 1470-1670 6

HEAT TREATMENT OF SPRING STEELS
material no. RELIGION SAE / AISI Forging Temperature ( °C ) Hot Forming Temperature( °C ) Normal Annealing Temperature ( °C ) Soft Annealing Temperature ( °C ) Hardening with Instant Cooling Tempering Temperature
( °C ) That oil
1.0900 38 C 6 – 1050-850 900-800 850-880 640-680 830-860 * – 350-550
1.0902 46 C 7 – 1100-850 900-830 850-880 640-680 830-860 * – 430-500
1.0903 51 C 7 – 1050-850 900-820 850-880 640-680 830-860 * – 350-550
1.0904 55 C 7 9255 1050-850 900-830 850-880 640-680 830-860 + * 430-500
1.0906 65 C 7 – 1050-851 900-830 850-880 640-680 830-860 – * 430-500
1.0908 60 SiMn 5 – 1100-851 900-830 850-880 640-680 830-860 – * 400-550
1.0961 60 SiCr 7 9262 1050-850 900-830 850-880 640-680 830-860 – * 350-550
1.0970 38 C 7 – 1050-850 900-830 850-880 640-680 830-860 * – 350-550
1.1231 Ck 67 1070 – – – 650-690 815-845 – * 300-500
1.1248 Ck 75 1075 – – – 650-690 810-840 – * 300-500
1.1269 Ck 85 1086 – – – 650-690 800-830 – * 300-500
1.1274 Ck 101 1095 1050-850 880-800 800-830 640-680 830-860 – * 430-500
1.5028 65 C 7 – 1050-853 900-830 830-860 640-680 830-860 – * 470-540
1.5029 71 Si 7 – 1100-853 900-820 850-880 640-680 830-860 – * 430-500
1.5225 51 MnV 7 – 1050-850 880-800 830-860 640-680 830-860 – * 430-500
1.7103 67 SiCr 5 – 1050-850 900-820 850-880 640-680 830-860 – * 430-500
1.7138 52 MnCrB 3 50B50 1050-854 900-800 850-880 640-680 830-860 – * 350-550
1.7176 55 Cr 3 5155 1100-854 900-800 850-880 640-680 830-860 – * 350-550
1.7701 51 CrMoV 7 – 1050-850 920-830 850-880 640-680 830-860 – * 350-550
1.8159 50 CrV 4 6150 1050-850 920-820 850-880 640-680 830-860 – * 350-550
1.8161 58 CrV 4 – 1050-855 920-830 850-880 640-680 830-860 – * 350-550
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