75Cr1 steel (DIN 1.2003) is a high-carbon, low-alloy steel, equivalent to AISI 1075 + Cr, British C75, and often associated with CK75, used for springs, blades, and tools, offering better hardenability than plain C75 due to its small chromium addition (around 0.3-0.4%) for improved hardness and wear resistance.
75Cr1 Steel Delivery Conditions :
| شروط التسليم | الأحجام | سطح | حافة |
| 1. المدرفلة على البارد | 1. السُمك: 0.09-8 مم | مشرق/مصقول/أزرق/أصفر | شق |
| 2. المدرفلة على البارد + الصلب بالهيدروجين | 2. العرض: 6-450 ملم | دائري | |
| 3. المدرفلة على البارد + المقسى + المقسى | القطر الداخلي للملف: 300-800 مم | مربع |
75Cr1 steel is a high carbon steel with a carbon content between 0.74% and 0.80%. The addition of chromium facilitates the heat treatment process and allows higher hardness to be achieved than the standard C75 Carbon Steel. 75Cr1 carbon steel is a variation on En10132 C75.

| GRADES COMPARISON FOR SPRING STEEL | ||||||||
| CHINA GB/T | USA أستم | JAPAN جيس | GERMANY الدين | FRANCE NF | BIRTAIN BS | ايزو | KOREA KS | TAIWAN CNS |
| 45 | 1045 | S45C | CK45 | XC45 | C45 | |||
| 50 | 1050 | S50C | CK50 | XC50 | 080 م50 | C50 | ||
| 60 | 1060 | S60C | CK60 | XC60 | 060A62 | C60 | ||
| 67 | 1067 | S67C | CK67 | XS67 | S67 | |||
| 70 | 1070 | S70C | CK70 | XS70 | S70 | |||
| 75 | 1075 | S75C | CK75 | XC75 | C75 | |||
| T10 | W1-9 | SK4 | ||||||
| T9 | W1-8 | SK5 | ||||||
| SK85 | — | SK85 | ||||||
| 40 مليون | 1043 | SWRH42B | 40Mn4 | 40 م5 | 080A40 | س، سم | ||
| 42 مليون | ||||||||
| 65 مليون | 1566 | S60C-CSP | CK67 | 080A67 | C60E4 | |||
| 55 سي2من | 9255 | SUP 6 SUP7 | 55 سي7 | 55 سي7 | 251 ح60 | 55سيكر7 | ||
| 60 سي2من | 9260 | SUP 6 SUP7 | 65 سي7 | 65 سي7 | 251 ح60 | 61سيكر7 | سوب3 | سوب6 |
| 62 سي2من | ||||||||
| 75Cr1 | 75Cr1 | 75Cr1 | 75Cr1 | |||||
| 51CrV4 | 5160 | SUP9A | 51CrV4 | 51CrV4 | SPS5A | SUP9A | ||
| 30CrMo | G41300 | سوب13 | 35CrMo4 | SPS9 | سوب13 | |||
| 50CrVA | 6150 | سوب10 | 51CrV4 | 51CrV4 | 735A51 | 51CrV4 | SPS6 | سوب10 |
| D6A | ||||||||
| X32 | X32CrMoV4-1 | |||||||
3، التركيب الكيميائي:
| Grade (EN) | درجة (ASTM) | Chemical Composition(%) | |||||||||
| ج | سي | من | ص | س | سجل تجاري | ني | النحاس | الخامس | شهر | ||
| C45S | 1045 | 0.42~0.50 | 0.17~0.37 | 0.50~0.80 | .035.035 | .035.035 | .250.25 | ≤0.3 | .250.25 | ||
| C50S | 1050 | 0.47~0.55 | 0.17~0.37 | 0.50~0.80 | .035.035 | .035.035 | .250.25 | ≤0.3 | .250.25 | ||
| C55S | 1055 | 0.52~0.60 | 0.17~0.37 | 0.50~0.80 | .035.035 | .035.035 | .250.25 | ≤0.3 | .250.25 | ||
| C60S | 1060 | 0.57~0.65 | 0.17~0.37 | 0.50~0.80 | .035.035 | .035.035 | .250.25 | ≤0.3 | .250.25 | ||
| C67S | 1067 | 0.62~0.70 | 0.17~0.37 | 0.50~0.80 | .035.035 | .035.035 | .250.25 | ≤0.3 | .250.25 | ||
| C70S | 1070 | 0.67~0.75 | 0.17~0.37 | 0.50~0.80 | .035.035 | .035.035 | .250.25 | ≤0.3 | .250.25 | ||
| C75S | 1075 | 0.72~0.80 | 0.17~0.37 | 0.50~0.80 | .035.035 | .035.035 | .250.25 | ≤0.3 | .250.25 | ||
| C100 | 1095 | 0.95~1.04 | .30.35 | .40.40 | .035.035 | ≤0.03 | .250.25 | ≤0.2 | ≤0.3 | ||
| 65 مليون | 65 مليون | 0.62~0.70 | 0.17~0.37 | 0.90~1.20 | .035.035 | .035.035 | .250.25 | ≤0.3 | .250.25 | ||
| SK85/SK5 | SK85/SK5 | 0.80 ~ 0.90 | .30.35 | .50.50 | ≤0.03 | ≤0.03 | ≤0.2 | .250.25 | ≤0.3 | ||
| SK4 | SK95 | 0.95~1.04 | .30.35 | .40.40 | .035.035 | ≤0.03 | .250.25 | ≤0.2 | ≤0.3 | ||
| 51CrV4 | 51CrV4 | 0.47~0.55 | 0.17~0.37 | 0.80~1.10 | .035.035 | .035.035 | 0.90~1.20 | ≤0.3 | ≤0.3 | 0.10~0.20 | |
| 75Cr1 | 75Cr1 | 0.7~0.8 | 0.25~0.5 | 0.50~0.70 | .035.035 | .035.035 | 0.30~0.40 | ||||
| 55 سي2من | 55 سي2من | 0.52~0.60 | 1.50~2.00 | 0.60~0.90 | .035.035 | .035.035 | .30.35 | .30.35 | .250.25 | ||
| 60si2Mn | 60si2Mn | 0.56~0.64 | 1.50~2.00 | 0.60~0.90 | .035.035 | .035.035 | .30.35 | .30.35 | .250.25 | ||
| D6A | D6A | 0.42~0.55 | 0.10~0.30 | 0.60~0.90 | .00.025 | .00.015 | 0.90~1.20 | 0.40~0.70 | 0.05~0.25 | 0.85~1.10 | |
4, 75Cr1 Steel Tolerances:
| THICKNESS TOLERNACES | |||||||
| Nominal Thickness (mm) | W < 125 | 125 <= W | |||||
| أ | ب | ج | أ | ب | ج | ||
| 0,15~0,25 | TS EN | ±0,015 | ±0,012 | ±0,008 | ±0,020 | ±0,015 | ±0,010 |
| توب ميتال STEEL | ±0,008 | ±0,010 | |||||
| 0,25~0,40 | TS EN | ±0,020 | ±0,015 | ±0,010 | ±0,025 | ±0,020 | ±0,012 |
| Top Metal STEEL | ±0,010 | ±0,012 | |||||
| 0,40~0,60 | TS EN | ±0,025 | ±0,020 | ±0,012 | ±0,030 | ±0,025 | ±0,015 |
| Top Metal STEEL | ±0,015 | ±0,015 | |||||
| 0,60~1,00 | TS EN | ±0,030 | ±0,025 | ±0,015 | ±0,035 | ±0,030 | ±0,020 |
| Top Metal STEEL | ±0,015 | ±0,020 | |||||
| 1,00~1,50 | TS EN | ±0,035 | ±0,030 | ±0,020 | ±0,040 | ±0,035 | ±0,025 |
| Top Metal STEEL | ±0,020 | ± 0,025 | |||||
| 1,50~2,50 | TS EN | ±0,040 | ±0,035 | ±0,025 | ±0,050 | ±0,040 | ±0,030 |
| TOP Metal STEEL | ±0,025 | ±0,030 | |||||
| 2,50~4,00 | TS EN | ±0,050 | ±0,040 | ±0,030 | ±0,060 | ±0,050 | ±0,035 |
| Top Metal STEEL | ±0,030 | ±0,035 | |||||
| Please contact us if you have any special requirements. | |||||||
| WIDTH TOLERANCES FOR SLIT EDGE (GK) | |||||||
| Width Tolerances TS EN 10140 | Production Width (mm) | ||||||
| Nominal Thickness (mm) | W < 125 | 125 <= W <= 250 | 250 < W | ||||
| أ | ب | أ | ب | أ | ب | ||
| 0,2 ~ 0,6 | TS EN | ± 0,15 | ± 0,10 | ± 0,20 | ± 0,13 | ± 0,25 | ± 0,18 |
| TOP Metal STEEL | ± 0,10 | ± 0,13 | ± 0,18 | ||||
| 0,6 ~ 1,5 | TS EN | ± 0,20 | ± 0,13 | ± 0,25 | ± 0,18 | ± 0,30 | ± 0,20 |
| Top Metal STEEL | ± 0,13 | ± 0,18 | ± 0,20 | ||||
| 1,5 ~ 2,5 | TS EN | ± 0,25 | ± 0,18 | ± 0,30 | ± 0,20 | ± 0,35 | ± 0,25 |
| TOP Metal STEEL | ± 0,18 | ± 0,20 | ± 0,25 | ||||
| 2,5 ~ 4,0 | TS EN | ± 0,30 | ± 0,20 | ± 0,35 | ± 0,25 | ± 0,40 | ± 0,30 |
| توب ميتال STEEL | ± 0,20 | ± 0,25 | ± 0,30 | ||||
